Temat: abrasive particles - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A new chemical mechanical slurry for polishing yttrium aluminium garnet material with magnesium oxide, sodium metasilicate pentahydrate and zirconium dioxide abrasive particles
Autorzy:: Duc, Le Anh
Hieu, Pham Minh
Quang, Nguyen Minh
Powiązania:: https://bibliotekanauki.pl/articles/24084631.pdf
Data publikacji:: 2023
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: chemical-mechanical polishing
yttrium aluminum garnet
magnesium oxide
abrasive particles
Opis:: This work provided a new chemical-mechanical polishing mixture with MgO, sodium metasilicate pentahydrate, ZrO2 abrasive particles, and deionized water. With chemical-mechanical slurry (CMS) proposed for polishing yttrium aluminum oxide (Y3Al5O12) the surface reaction layer formed with significantly reduced hardness compared to other Y3Al5O12 materials, these products combine with MgO to form montmorillonites (3MgO–Al2O3–3SiO2–3Y2O3–5Al2O3). With this formation, the surface layer of Y3Al5O12 material becomes soft and is easily removed by ZrO2 abrasive particles under the influence of mechanical polishing, resulting in superfine surfaces generated from the proposed CMS model. The experimental results show that the surface quality with CMS proposed gives the surface quality with Ra = 0.471 nm along with the material removal rate 31 (nm/min). Surface quality is improved by 71% along with a superior material removal rate (increased by 287%) compared to silica slurry. The results show excellent polishing ability from CMS proposed for polishing Y3Al5O12 materials.
Źródło:: Journal of Machine Engineering; 2023, 23, 2; 174--185
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Wpływ cząstek stałych na tendencję oleju napędowego do blokowania filtrów
The impact of abrasive particles on the diesel fuel filter blocking tendency
Autorzy:: Żółty, Magdalena
Dybich, Kornel
Powiązania:: https://bibliotekanauki.pl/articles/1834237.pdf
Data publikacji:: 2020
Wydawca:: Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:: cząstki stałe
twarde cząstki
klasa czystości
olej napędowy
abrasive particles
hard particles
cleanliness code
diesel fuel
Opis:: This article presents the results of the work, the purpose of which was to conduct extensive research on the content of diesel fuel impurities together with determining the purity class and the tendency to block filters in various temperature conditions. 86 diesel fuel samples of various manufacturers were obtained at gas stations. They were taken from distributors, since the latter constitute the last link in the distribution chain, from which the fuel directly goes to the end user, who may suffer problems related to the failure of the injection system. The scope of tests covered the parameters included in the PN-EN 590 specification, with particular emphasis on the total content of impurities, as well as additional tests, i.e. cleanliness class (parameter included in the World Fuels Card), in the range of particles 4, 6 and 14 µm, tendency to block filters at temperature at room temperature and at –1°C and, for selected samples, of elemental content. Samples were taken from October 2018 to July 2019. They covered both transitional periods as well as summer and winter periods. Currently, TF (Task Force) operating within the WG 24 Working Group on diesel fuels is conducting research aimed at developing the position of CEN on problems related to the presence of solid particles in diesel fuel and determining the purity class limit as well as method for determining the number of particles in order to introduce it into the EN 590 specification. Correlations between the number of particles and parameters such as the tendency to block filters at room temperature and at reduced temperatures (3 or –1°C), total impurities content, water content or the presence of such elements like Fe, Cu and Si are also analyzed. The analysis of the obtained test results allowed to conclude that the problem of particulate fuel pollution concerns a large group of diesel fuels available on the domestic market. Among other things, it can be mentioned that these fuels are contaminated with metal particles that get into the fuel as a result of wear of friction surfaces and together with impurities coming from outside the system.
Źródło:: Nafta-Gaz; 2020, 76, 3; 205-214
0867-8871
Pojawia się w:: Nafta-Gaz
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: The Influence of Graphite Addition on the Abrasive Wear of AlMg10 Alloy Matrix Composites Reinforced with SiC Particles
Autorzy:: Łągiewka, M.
Konopka, Z.
Powiązania:: https://bibliotekanauki.pl/articles/382261.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: composites
abrasive wear
hard SiC particles
hardness of composite materials
kompozyty
zużycie ścierne
twarde cząstki SiC
twardość materiałów kompozytowych
Opis:: The presented work deals with the influence of the addition of soft graphite particles on the abrasive wear of composite reinforced with hard SiC particles. The discussed hybrid composites were produced by stirring the liquid alloy and simultaneous adding the mixture of particles. The adequately prepared suspension was gravity cast into a metal die. Both the composite castings obtained in this way and the comparative castings produced of the pure matrix alloy were examined for the abrasive wear behaviour. Photomacrographs of the sliding surfaces of the examined composites were taken, and also the hardness measurements were carried out. It was found that even a small addition of C_gr particles influences positively the tribological properties of the examined composite materials, protecting the abraded surface from the destructive action of silicon carbide particles. The work presents also the results of hardness measurements which confirm that the composite material hardness increases with an increase in the volume fraction of hard reinforcing particles.
Źródło:: Archives of Foundry Engineering; 2014, 14, 3; 51-54
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Properties of aluminium-ceramic phase composites produced from P/M compacts in hot forging and extrusion processes
Własności kompozytów aluminium-faza ceramiczna kształtowanych z wyprasek w procesach kucia i wyciskania na gorąco
Autorzy:: Wojtaszek, M.
Powiązania:: https://bibliotekanauki.pl/articles/263994.pdf
Data publikacji:: 2007
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: metalurgia proszków
proszek aluminium
kompozyty
włókna ceramiczne
cząstki ceramiczne
kucie na gorąco
wyciskanie na gorąco
własności fizyczne
własności mechaniczne
zużycie ścierne
powder metallurgy
aluminium powder
composites
ceramic particles
ceramic fibres
hot forging
hot extrusion
physical properties
mechanical properties
abrasive wear
Opis:: The results of investigations of properties of aluminium-based composites produced by means of powder metallurgy and plastic working processes are presented in the paper. Atomized aluminium po-wder was used as a metallic matrix. As a reinforcement ceramic particles and fibres were used, and their volume fraction was maintained constant at 5%. The initial material to be formed was prepared by mixing of ingredients and compaction of the obtained mixture. Aluminium powder compacts and com-posite mixtures were subjected to consolidation and deformation in closed-die hot forging and hot extrusion processes, applying the extrusion ratio X = 4.11. These processes were realized in isothermal conditions, at the temperature of 500°C. The effect of a type of reinforcing phase as well as method of deformation on selected physical, mechanical and functional properties of obtained materials was ana-lysed. It was found that the proposed method results in obtaining highly compacted products, showing mechanical and functional properties which allow to use them in structural components. The product properties can be controlled by means of selection of a type of reinforcing phase as well as method of deformation.
W pracy zestawiono wyniki badań własności materiałów kompozytowych na osnowie aluminium, kształtowanych z zastosowaniem procesów metalurgii proszków i przeróbki plastycznej. W roli osnowy użyto rozpylany proszek aluminium. Do jej umocnienia zastosowano zbrojenie ceramiczne; cząstki oraz włókna, stosując stały ich udział objętościowy w osnowie, który wynosił 5%. Materiał wyjściowy do kształtowania przygotowano poprzez zmieszanie składników oraz ich sprasowanie na zimno. Wypraski proszku aluminium i sprasowane mieszaniny kompozytowe zagęszczano oraz kształtowano w procesach kucia na gorąco w matrycach zamkniętych oraz wyciskania na gorąco z współczynnikiem X = 4,11. Procesy te realizowano w warunkach izotermicznych, przy temperaturze 500°C. Analizowano wpływ rodzaju fazy umacniającej oraz sposobu kształtowania na wybrane własności fizyczne, mechaniczne i użytkowe otrzymanych tworzyw. Stwierdzono, że proponowana metoda prowadzi do otrzymania produktów wysoko zagęszczonych, o własnościach mechanicznych oraz użytkowych umożliwiających ich stosowanie na elementy konstrukcyjne. Właściwościami wyrobów można sterować poprzez dobór rodzaju fazy umacniającej oraz sposób ich kształtowania.
Źródło:: Metallurgy and Foundry Engineering; 2007, 33, 1; 63-72
1230-2325
2300-8377
Pojawia się w:: Metallurgy and Foundry Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "abrasive particles" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język