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Tytuł:
Internal Friction of Phase Transformations Observed Around Room Temperature in Ga-In-Sn Eutectic Alloys
Tarcie wewnętrzne przemian fazowych obserwowanych przy temperaturze pokojowej w eutektycznym stopie Ga-In-Sn
Autorzy:
Jin, M.
Li, Q.
Ying, R.
Lu, X.
Jin, X.
Ding, X.
Powiązania:
https://bibliotekanauki.pl/articles/352781.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Ga-In-Sn alloy
internal friction
liquid-liquid transition
stop Ga-In-Sn
tarcie wewnętrzne
wstępne krzepnięcie
Opis:
The phase transformation phenomena in eutectic Ga-In-Sn alloys around room temperature are studied by thermal analysis, internal friction, and in-situ XRD methods. The results show that in addition to the solidification transformation, a novel the so-called ‘pre-solidification’ phase transition, demonstrating first-order feature, is observed prior to the crystallization during cooling. The internal friction increases when the ‘pre-solidification’ effect occurs. The shear modulus increases until crystallization. An internal friction peak is attributed to the melting process observed during heating. The mechanism of the ‘pre-solidification’ transformation in Ga-In-Sn eutectic alloy is discussed.
Zjawiska przemian fazowych w eutektycznych stopach Ga-In-Sn, około temperatury pokojowej, badane są metodami analizy termicznej, tarcia wewnętrznego i XRD in-situ. Wyniki pokazują, że w dodatku do przemiany krzepnięcia, nowa przemiana tzw. „wstępne krzepnięcie”, o charakterze przemiany pierwszego rzędu, obserwowana jest przed krystalizacją podczas chłodzenia. Tarcie wewnętrzne zwiększa się, gdy występuje „wstępnie krzepnięcie”. Moduł sprężystości poprzecznej zwiększa się aż do krystalizacji. Wewnętrzny pik tarcia przypisany jest do topienia obserwowanego podczas ogrzewania. Omówiono mechanizm przemiany „wstępnego krzepnięcia” w eutektycznym stopie Ga-In-Sn.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 3A; 2097-2100
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Whisker-Like Formations in Sn-3.0Ag-Pb Alloys
Autorzy:
Koncz-Horváth, D.
Gergely, G.
Gacsi, Z.
Powiązania:
https://bibliotekanauki.pl/articles/351400.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Sn-Ag alloy
soldering
whisker formation
microstructure analysis
Opis:
In this study, different types of whisker-like formations of Sn-3.0Ag based alloy were presented. In the experimental process the amount of Pb element was changed between 1000 and 2000 ppm, and the furnace atmosphere and cooling rate were also modified. The novelty of this work was that whisker-like formations in macro scale size were experienced after an exothermic reaction. The whiskers of larger sizes than general provided opportunities to investigate the microstructure and the concentration nearby the whiskers. In addition, the whisker-like formations from Sn-Ag based bulk material did not only consist of pure tin but tin and silver phases. The whisker-like growth appeared in several forms including hillock, spire and nodule shaped formations in accordance with parameters. It was observed that the compound phases were clustered in many cases mainly at hillocks.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2B; 1027-1031
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructure and Hardness of Cu-22Sn-xC Alloys Fabricated by Powder Metallurgy
Autorzy:
Kim, Gwanghun
Park, Jungbin
Lee, Seok-Jae
Kim, Hee-Soo
Powiązania:
https://bibliotekanauki.pl/articles/2203705.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Cu-Sn alloy
nanocrystalline
carbon solubility
mechanical alloying
Opis:
Cu-Sn alloys have been known as bronze since ancient times and widely used as electrode materials, ornaments, tableware and musical instruments. Cu-22Sn alloy fabrication by hot forging process is a Korean traditional forged high-tin bronze. The tin content is 22 percent, which is more than twice that of bronze ware traditionally used in China and the West. Copper and tin have a carbon solubility of several ppm at room temperature, making Cu-Sn-C alloys difficult to manufacture by conventional casting methods. Research on the production of carbon-added copper alloys has used a manufacturing method that is different from the conventional casting method. In this study, Cu-22Sn-xC alloy was fabricated by mechanical alloying and spark plasma sintering. The carbon solubility was confirmed in Cu-Sn alloy through mechanical alloying. The lattice parameter increased from A0 to C2, and then decreased from C4. The microstructural characteristics of sintered alloys were determined using X-ray diffraction and microscopic analysis. As a result of comparing the hardness of Cu-22Sn alloys manufactured by conventional rolling, casting, and forging and Cu-22Sn-xC alloy by sintered powder metallugy, B0 sintered alloy was the highest at about 110.9 HRB.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 1; 71--75
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement and Comparison of Reliability Performance of Photovoltaic Power Optimizers for Energy Production
Autorzy:
Catelani, M.
Ciani, L.
Graditi, G.
Adinolfi, G.
Powiązania:
https://bibliotekanauki.pl/articles/220657.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
photovoltaic
DMPPT converter
reliability
MIL-HDBK-217F
Siemens SN29500
Opis:
Photovoltaic (PV) power optimizers are introduced in PV systems to improve their energetic productivity in presence of mismatching phenomena and not uniform operating conditions. Commercially available converters are characterized by different DC-DC topologies. A promising one is the boost topology with its different versions. It is characterized by its circuital simplicity, few devices and high efficiency values - necessary features for a Distributed Maximum Power Point Tracking (DMPPT) converter. PV power optimizer designs represent a challenging task since they operate in continuously changing operating conditions which strongly influence electronic component properties and thus the performance of complete converters. An aspect to carefully analyze in such applications is the thermal factor. In this paper, a necessity to have a suitable temperature monitoring system to avoid dangerous conditions is underlined In addition, another important requirement for a PV power optimizer is its reliability, since it can suggest a useful information on its diagnostic aspects, maintenance and investments. In fact, a reliable device requires less maintenance services, also improving the economic aspect. The evaluation of the electronic system reliability can be carried out using different reliability prediction models. In this paper, reliability indices, such as the Mean Time Between Failure (MTBF) or the Failure Rate of a Diode Rectification (DR) boost, are calculated using the evaluation of the Military Handbook 217F and Siemens SN29500 prediction models. With the reliability prediction results it has been possible to identify the most critical components of a DMPPT converter and a measurement setup has been developed in order to monitor the component stress level on the temperature, power, voltage, current, and energy in the DMPPT design phase avoiding the occurrence of a failure that might decrease the service life of the equipment.
Źródło:
Metrology and Measurement Systems; 2015, 22, 1; 139-152
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Impact of Nickel Additions on Tin Bronzes
Autorzy:
Kozana, J.
Garbacz-Klempka, A.
Piękoś, M.
Czekaj, J.
Perek-Nowak, M.
Powiązania:
https://bibliotekanauki.pl/articles/382525.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wear resistant alloys
tin bronze
microstructure
alloy additives
Cu–Sn–Ni alloy
stopy odporne na zużycie
brąz cynowy
mikrostruktura
dodatki stopowe
stop Cu-Sn-Ni
Opis:
High prices of tin and its limited resources, as well as several valuable properties characterising Cu-Sn alloys, cause searching for materials of similar or better properties at lower production costs. The influence of various nickel additions to CuSn10 casting bronze and to CuSn8 bronze of a decreased tin content was tested. Investigations comprised melting processes and casting of tin bronzes containing various nickel additions (up to 5%). The applied variable conditions of solidification and cooling of castings (metal and ceramic moulds) allowed to assess these alloys sensitivity in forming macro and microstructures. In order to determine the direction of changes in the analysed Cu-Sn-Ni alloys, the metallographic and strength tests were performed. In addition, the solidification character was analysed on the basis of the thermal analysis tests. The obtained results indicated the influence of nickel in the solidification and cooling ways of the analysed alloys (significantly increased temperatures of the solidification beginning along with increased nickel fractions in Cu-Sn alloys) as well as in the microstructure pattern (clearly visible grain size changes). The hardness and tensile strength values were also changed. It was found, that decreasing of the tin content in the analysed bronzes to which approximately 3% of nickel was added, was possible, while maintaining the same ultimate tensile strength (UTS) and hardness (HB) and improved plasticity (A5).
Źródło:
Archives of Foundry Engineering; 2018, 18, 1; 53-60
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sintering Behavior and Mechanical Property of Cu-Sn Alloy with Ag Addition Produced by Pulsed Electric Current Sintering
Autorzy:
Lee, Se Hwan
Ahn, Byungmin
Powiązania:
https://bibliotekanauki.pl/articles/2174574.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
powder metallurgy
Cu-Sn alloy
pulsed electric current sintering
grinding tool
Opis:
This work mainly focuses on the sintering behavior of the Cu-Sn alloy with the addition of Ag up to 4 wt% after pulsed electric current sintering (PECS) process for ultra-fast sintering. The microstructural evolution was characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and density measurements. The mechanical properties were evaluated via measurements of transverse rupture strength (TRS) and Rockwell hardness. The mechanism during the sintering process has been discussed thoroughly, and the effect on porosity with the addition of the Ag is also correlated. The results showed that the growth of porosity progressed with the amount of Ag up to 2 wt%, and further addition of Ag leads reduction in porosity. The effect on mechanical properties were improved slowly as the amount of Ag increased.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 4; 1475--1479
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Aluminum on the Microstructure and Hardness of Mg-5Si-7Sn Alloy
Autorzy:
Rzychoń, T.
Dybowski, B.
Powiązania:
https://bibliotekanauki.pl/articles/351398.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cast magnesium alloys
Mg-Si alloys
Mg-Sn alloys
microstructure
precipitation hardening
Opis:
Magnesium alloys due the low density and good mechanical properties are mainly used in the automotive and aerospace industry. In recent years, magnesium alloys are extensively developed for use in high temperatures (above 120°C). Among these alloys, magnesium alloys containing tin and silicon have large possibilities of application due to the formation of thermally stable intermetallic Mg2Sn and Mg2Si. In this paper the influence of aluminum and heat treatment on the on the microstructure and hardness of Mg-7Sn-5Si alloy is reported. It was found that the microstructure of Mg-7Sn-5Si alloy consist of α-Mg solid solution, Mg2Sn and Mg2Si compounds. Addition of 2 wt% of Al to Mg-7Sn-5Si alloy causes the formation of Al2Sn phase. Moreover, Al dissolves in the α-Mg solid solution. The solution heat-treatment of tested alloys at 500°C for 24 h causes the dissolve the Mg2Sn phase in the α-Mg matrix and spheroidization of Mg2Si compound. The Mg2Si primary crystals are stable at solution temperature. After ageing treatment the precipitation process of equilibrium Mg2Sn phase was found in both alloys. The addition of aluminum has a positive effect on the hardness of Mg-7Sn-5Si alloy. In case of Mg-5Si-7Sn-2Al alloy the highest hardness was obtained for sample aged for 148 h at 250°C (88 HV2), while in case of Al-free alloy the highest hardness is 70 HV for material aged for 148 h at 250°C.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 1; 425-432
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Controlled Porosity on the Mechanical Properties of Ti-Zr-Sn-Mo Biomedical Alloys
Autorzy:
Kim, Yeon-Wook
Erlangga, Bagus D.
Do, Dalhyun
Lee, Seong-Min
Powiązania:
https://bibliotekanauki.pl/articles/352474.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Ti-Zr-Sn-Mo alloy
porous scaffolds
biomedical materials
shape memory alloys
Opis:
In this study, a simple and effective way to fabricate highly porous scaffolds with controlled porosity and pore size is demonstrated. Ti-7Zr-6Sn-3Mo shape memory alloy fibers were prepared through a melt overflow process. The scaffolds with porosity of 65-85% and large pores of 100-700 μm in size were fabricated by sintering the as-solidified fibers. Microstructures and transformation behaviors of the porous scaffolds were investigated by means of SEM, DSC and XRD. The scaffolds were composed of β phase at room temperature. Superelasticity with the superelastic recovery strain of 7.4% was achieved by β↔α”phase transformation. An effect of porosity on mechanical properties of porous scaffolds was investigated by using compressive test. As the porosity increased from 65% to 85%, elastic modulus and compressive strength decreased from 0.95 to 0.06 GPa and from 27 to 2 MPa, respectively.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 4; 1341-1344
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Evolution of Microstructure and Magneto-structural Properties of Heat Treated Ni-Mn-Sn-In Heusler Alloys Sintered by Vacuum Hot Pressing
Autorzy:
Maziarz, W.
Wójcik, A.
Chulist, R.
Szczerba, M. J.
Kowalczyk, M.
Czaja, P.
Cesari, E.
Dutkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/947530.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Ni-Mn-Sn metamagnetic shape memory alloys
sintering process
heat treatment
electron microscopy
Opis:
In this work, vacuum hot pressed Ni-Mn-Sn-In Heusler alloys with different concentration of In (0, 2 and 4 at.%), were investigated. The magneto-structural behaviour and microstructure dependencies on chemical composition and on heat treatment were examined. It was found that the martensite start transformation temperature increases with growing In content and to a lesser extent with increasing temperature of heat treatment. The high energy X-ray synchrotron radiation results, demonstrated that both chemical composition as well as temperature of heat treatment slightly modified the crystal structures of the studied alloys. Microstructural investigation performed by transmission electron microscopy confirmed chemical composition and crystal structure changes in the alloys.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 2; 727-732
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New Wear Resistant Iron-Base Matrix Materials For The Fabrication Of Sintered Diamond Tools
Nowe, odporne na zużycie ścierne materiały na bazie żelaza przeznaczone do produkcji spieków narzędziowych metaliczno-diamentowych
Autorzy:
Konstanty, J.
Romański, A.
Baczek, E.
Tyrala, D.
Powiązania:
https://bibliotekanauki.pl/articles/355118.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ball milling
sintered diamond tools
matrix powder
Fe-Ni-Cu-Sn-C
Fe-Mn-Cu-Sn-C
hot pressing
mielenie kulowe
spieki narzędziowe metaliczno-diamentowe
materiały spiekowe
prasowanie na gorąco
Opis:
The possibility of the use of inexpensive iron-base powders in the production of sintered diamond tools is again explored. Ball-milled Fe-Ni-Cu-Sn-C and Fe-Mn-Cu-Sn-C powders were consolidated to a virtually pore-free condition by hot pressing at 900°C. The resultant materials are characterised by a combination of high Knoop hardness, 260-440 and yield strength, 780-1350 MPa, and resistance to abrasion. These properties can be significantly modified by changing the milling time.
W artykule zamieszczono wyniki badań nad możliwością zastosowania tanich proszków na bazie żelaza do produkcji spiekanych narzędzi metaliczno-diamentowych. Mielone proszki Fe-Ni-Cu-Sn-C i Fe-Mn-Cu-Sn-C poddano prasowaniu na gorąco w temperaturze 900°C. Otrzymane spieki posiadają gęstość zbliżoną do teoretycznej, wysoką twardość (260-400 HK0.5), granicę plastyczności (780-1350 MPa) oraz dużą odporność na zużycie ścierne. Wymienione własności są w dużym stopniu uzależnione od czasu mielenia proszków wyjściowych.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 2A; 633-637
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimised magnetron sputtering method for the deposition of indium tin oxide layers
Autorzy:
Musztyfaga-Staszuk, Małgorzata
Pudiš, Dušan
Socha, Robert
Gawlińska-Nęcek, Katarzyna
Panek, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2090684.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
In2O3
Sn2O
ITO
magnetron sputtering method
metoda rozpylania magnetronowego
Opis:
The article presents the method of magnetron sputtering for the deposition of conductive emitter coatings in semiconductor structures. The layers were applied to a silicon substrate. For optical investigations, borosilicate glasses were used. The obtained layers were subjected to both optical and electrical characterisation, as well as structural investigations. The layers on silicon substrates were tested with the four-point probe to find the dependence of resistivity on the layer thickness. The analysis of the elemental composition of the layer was conducted using a scanning electron microscope equipped with an EDS system. The morphology of the layers was examined with the atomic force microscope (AFM) of the scanning electron microscope (SEM) and the structures with the use of X-ray diffraction (XRD). The thickness of the manufactured layers was estimated by ellipsometry. The composition was controlled by selecting the target and the conditions of the application, i.e. the composition of the plasma atmosphere and the power of the magnetrons. Based on the obtained results, this article aims to investigate the influence of the manufacturing method and the selected process parameter on the optical properties of thin films, which should be characterised by the highest possible value of the transmission coefficient (>85–90%) and high electrical conductivity.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 6; e139005, 1--6
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transient Liquid Phase Behavior of Sn-Coated Cu Particles and Chip Bonding using Paste Containing the Particles
Autorzy:
Hwang, J. H.
Lee, J.-H.
Powiązania:
https://bibliotekanauki.pl/articles/353042.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Sn-coated Cu
immersion plating
chip bonding
intermetallic compounds (IMC)
transient liquid phase (TLP)
sintering
Opis:
Sn-coated Cu particles were prepared as a filler material for transient liquid phase (TLP) bonding. The thickness of Sn coating was controlled by controlling the number of plating cycles. The Sn-coated Cu particles best suited for TLP bonding were fabricated by Sn plating thrice, and the particles showed a pronounced endothermic peak at 232°C. The heating of the particles for just 10 s at 250°C destroyed the initial core-shell structure and encouraged the formation of Cu-Sn intermetallic compounds. Further, die bonding was also successfully performed at 250°C under a slight bonding pressure of around 0.1 MPa using a paste containing the particles. The bonding time of 30 s facilitated the bonding of Sn-coated Cu particles to the Au surface and also increased the probability of network formation between particles.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2B; 1143-1148
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Temperature Field, Heat and Fluid Flow of Two-Phase Zone Continuous Casting Cu–Sn Alloy Wire
Autorzy:
Luo, J.
Liu, X.
Wang, X.
Powiązania:
https://bibliotekanauki.pl/articles/380230.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
continuous casting
two-phase zone continuous casting
alloy Cu-Sn
numerical simulation
temperature field
heat flow
fluid flow
odlewanie ciągłe
strefa odlewania dwufazowego
stop Cu-Sn
symulacja numeryczna
pole temperatury
przepływ ciepła
przepływ płynu
Opis:
Cu–4.7 wt. % Sn alloy wire with Ø10 mm was prepared by two-phase zone continuous casting technology, and the temperature field, heat and fluid flow were investigated by the numerical simulated method. As the melting temperature, mold temperature, continuous casting speed and cooling water temperature is 1200°C, 1040°C, 20 mm/min and 18°C, respectively, the alloy temperature in the mold is in the range of 720°C–1081°C, and the solid/liquid interface is in the mold. In the center of the mold, the heat flow direction is vertically downward. At the upper wall of the mold, the heat flow direction is obliquely downward and deflects toward the mold, and at the lower wall of the mold, the heat flow deflects toward the alloy. There is a complex circular flow in the mold. Liquid alloy flows downward along the wall of the mold and flows upward in the center.
Źródło:
Archives of Foundry Engineering; 2016, 16, 1; 33-40
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects Of Nickel On The Microstructure And The Mechanical Properties Of Sn-0.7Cu Lead-Free Solders
Wpływ niklu na mikrostrukturę i właściwości mechaniczne bezołowiowych stopów lutowniczych Sn-0.7Cu
Autorzy:
Gyenes, A.
Simon, A.
Lanszki, P.
Gacsi, Z.
Powiązania:
https://bibliotekanauki.pl/articles/353640.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Sn-0.7Cu
lead-free solder
Ni addition
microstructre
mechanical properties
bezołowiowy stop lutowniczy
nikiel
mikrostruktura
właściwości mechaniczne
Opis:
This paper investigates the effects of small amount nickel addition (0, 200, 400, 800, 1800 ppm) on the microstructure and the mechanical properties of Sn-0.7Cu lead-free solder alloys. It is known that even ppm level Ni additions have significant effects on the microstructure of Sn-Cu solder alloys. Ni suppresses the growth of β-Sn dendrites in favour of eutectic formation. As the nickel content increases, the microstructure undergoes a morphological evolution from hypoeutectic through fully eutectic to hypereutectic. Along with these transformations, the mechanical properties of the alloy also significantly change. Based on the experimental results presented in this paper, the Sn-0.7Cu solder achieves maximum strength at the addition level of 800 ppm Ni, when the microstructure becomes fully eutectic.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 2B; 1449-1454
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics of Sn-Zn Cast Alloys with the Addition of Ag and Cu
Charakterystyka odlanych stopów Sn-Zn z dodatkiem Ag i Cu
Autorzy:
Gancarz, T.
Pstruś, J.
Powiązania:
https://bibliotekanauki.pl/articles/353770.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Sn-Zn-Ag-Cu
CTE
electrical resistivity
lead-free solders
XRD
microstructure of cast alloys
rezystancja
bezołowiowe lutowanie
mikrostruktura stopów odlewniczych
Opis:
The aim of this work was to study the effects of Ag and Cu on the thermal properties and microstructure of Sn-Zn-Ag-Cu cast alloys. Solders based on eutectic Sn-Zn containing 0.5 to 1.0 at.% of Ag and Cu were developed for wave soldering. DSC measurements were performed to determine the melting temperatures of the alloys. TMA and electrical resistivity measurements were performed between -50 and 150°C and between 30 and 150°C, respectively. Small precipitates of Cu5Zn8, CuZn4, and AgZn3 were observed in the microstructures, and their presence was confirmed by XRD measurements. The inclusion of Ag and Cu improved the electrical resistivity and increased the melting temperature, as well as the CTE, of the alloys. However, tests performed to measure the mechanical properties of the alloys demonstratedthat the addition of Ag and Cu caused the mechanical properties to decrease.
Celem pracy było zbadanie wpływu dodatku Ag i Cu na właściwości termiczne i mikrostrukturę stopów Sn-Zn-Ag-Cu. Stopy lutownicze na bazie eutektyki Sn-Zn zawierające od 0,5 do 1,0 % at. Ag oraz Cu zostały opracowane do lutowania falowego. Pomiary DSC wykonywano w celu określenia temperatury topnienia stopów. Badania współczynnika rozszerzalności liniowej przeprowadzono w temperaturach -50 i 150 °C, a oporu elektrycznego od 30 do 150 °C. W mikrostrukturze zaobserwowano drobne wydzielenia Cu5Zn8, CuZn4 i AgZn3, a ich obecność potwierdzono pomiarami XRD. Dodatek Ag i Cu do eutektyki SnZn obniża rezystywność elektryczną, a podnosi temperaturę topnienia oraz współczynnik rozszerzalności liniowej stopów. Przeprowadzone badania mechaniczne odlanych stopów wykazały, że dodanie Ag oraz Cu spowodowało obniżenie właściwości mechanicznych.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 3A; 1603-1607
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 16

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