Temat: carbonitride - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Combustion Synthesis of Titanium Carbonitrides
Autorzy:: Dyjak, S.
Wasilewska, M.
Cudziło, S.
Powiązania:: https://bibliotekanauki.pl/articles/358421.pdf
Data publikacji:: 2015
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: combustion synthesis
titanium carbonitride
ceramics
refractory materials
Opis:: Titanium carbonitride (TiC0.5N0.5) micron powders were synthesized in reactions of titanium with zinc dicyanide: Zn(CN)2 + 4Ti → 4TiC0.5N0.5 + Zn. The reactions are sufficiently exothermic to propagate in the reactant mixture to form a self-sustaining, high-temperature synthesis (SHS). The final product was separated and the only byproduct (zinc) was removed by dissolution in dilute hydrochloric acid. The use of zinc dicyanide as the source of carbon and nitrogen causes the titanium carbonitride to contain only these elements in an atomic ratio of one. The reaction temperature can be easily reduced by the addition of zinc powder to the green mixture. Synthesis in the presence of zinc yields TiC0.5N0.5 powders consisting of round-shaped and unagglomerated particles.
Źródło:: Central European Journal of Energetic Materials; 2015, 12, 2; 249-259
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Thermodynamic Analysis of Precipitation Process of Complex Carbonitride TixV1-xCyN1-y in HSLA-Type Steel
Autorzy:: Wojtacha, Anna
Opiela, Marek
Powiązania:: https://bibliotekanauki.pl/articles/2201794.pdf
Data publikacji:: 2022
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: carbonitride
thermodynamic model
HSLA-type steel
microstructure
Opis:: The paper presents a detailed analysis of the MX-type interstitial phase precipitation process and a thermodynamic analysis of the TixV1-xCyN1-y carbonitride precipitation in austenite. The subject of research analysis was the newly developed HSLA-type steel containing 0.175% C, 1.02% Si, 1.87% Mn, 0.0064% N, 0.22% Mo, and microadditions 0.022% V and 0.031% Ti. Analysis of the process of precipitation of MX interstitial phases under thermodynamic equilibrium conditions proved that the first phase that precipitates in the austenite of the tested steel is TiN-type nitride. The onset temperature of this phase was 1450°C. Subsequently, carbides of the TiC-type, VN-type nitrides and VC-type carbides, for which the precipitation onset temperatures were 1180°C, 870°C and 775°C will be released, respectively. The analysis of the precipitation process of the complex carbonitride in austenite under thermodynamic equilibrium conditions was based on the Hillert and Staffansson model, developed by Adrian, with the use of the CarbNit computer program. The beginning of carbonitride precipitation with the stoichiometric composition Ti0.985V0.015C0.073N0.927 occurred at the temperature of 1394°C. At 850°C practically all of the Ti is bound in the carbonitride of the stoichiometric composition Ti0.883V0.117C0.378N0.622. At the same temperature, a significant part of microaddition V will be dissolved in austenite, which means that vanadium will have a lesser effect on the formation of a fine-grained austenite structure, but more strongly on the precipitation hardening of steel by the dispersion VN and V particles (C,N) released during the cooling of the products.
Źródło:: Advances in Science and Technology. Research Journal; 2022, 16, 4; 64--73
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Electro-deposition parameters of boron carbonitride (bcn) from borax pentahydrate (NA2B4O7•5H2O)
Autorzy:: Tufan, B.
Batar, T.
Powiązania:: https://bibliotekanauki.pl/articles/109855.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: electro-deposition
boron carbonitride
borax pentahydrate
low temperature
Opis:: The primary objective of this research is the fabrication of boron end products from boron derivatives by electro-deposition as powder or coating. The production of boron carbonitride is achieved by electro-deposition at low temperatures without carbon dioxide emission, regardless of sintering and thermal treatment. The extensive usage of boron is aimed and should be accomplished by application of electro-deposition method for boron carbonitride fabrication.
Źródło:: Physicochemical Problems of Mineral Processing; 2016, 52, 1; 136-146
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Possibilities of applying Ti (C, N) coatings on prosthetic elements : research with the use of human endothelial cells
Autorzy:: Banaszek, K.
Wiktorowska-Owczarek, A.
Kowalczyk, E.
Klimek, L.
Powiązania:: https://bibliotekanauki.pl/articles/306892.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: materiały stomatologiczne
stopy stomatologiczne
węglikoazotki tytanu
powłoka
cellviability
microvascular endothelial cells
Ni-Cr
dental alloys
titanium carbonitride
Ti(C, N)
coating
Opis:: Purpose: The aim of our study was to examine the effect of prosthetic alloys with Ti (C, N) coatings on viability and pro life ration of human cells employing an MTT assay with the use of human microvascular endothelial cells derived from the skin – HMEC-1 (Human Microvascular Endothelial Cells-1). Methods: Cylindrical shape samples made of Ni-Cralloy were divided into S1-S5 groups and coated with Ti (C, N) layers with different content of C and N. S0 group – control group without layer. The alloys (S0-S5) were stored in an experimental medium (MCDB131 with antibiotics) for 30 days and then HMEC-1 cells were incubated in the alloy extract for 24 and 96 hours. Next, cell viability was determined using MTT method. Results: In the case of samples incubated for both 24 and 96 hours there are statistically significant differences (with p-value <0.05) between the uncoated samples (S0 group) and all the other Ti (C, N) coated samples. Higher absorbance values were observed in all coated groups than in the control S0 group, where cell growth was statistically significantly lower. Conclusions: During incubation of endothelial cells with coated samples the number of cells was significantly bigger than the number with uncoated alloys. The best viability of cells was obtained from the S = 3 (with 51.94% at. Ti, 28.22% at. C and 19.84% at. N) group of samples. Ti (C, N) coatings may be applied as protective components on prosthetic elements made of base metal alloys.
Źródło:: Acta of Bioengineering and Biomechanics; 2016, 18, 1; 129-136
1509-409X
2450-6303
Pojawia się w:: Acta of Bioengineering and Biomechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Model of phase transformation for niobium microalloyed steels
Model przemiany fazowej dla stali z mikrododatkiem niobu
Autorzy:: Niżnik, B.
Pietrzyk, M.
Powiązania:: https://bibliotekanauki.pl/articles/351591.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: mikrostopowe stale niobu
model przemian fazowych
obróbka cieplno-mechaniczna
modelowanie wielozakresowe
niobium microalloyed steels
model of phase transformation
carbonitride precipitation process
thermomechanical treatment
multiscale modelling
Opis:: The paper presents the results of physical and numerical modeling of the kinetics of phase transformation, taking into account the precipitation of niobium carbonitride. Strain induced precipitation is a phenomenon, which controls the evolution of the microstructure in these steels during thermo-mechanical treatment. For the numerical simulation of precipitation Dutta-Sellars model was used, which describes the precipitation kinetics of Nb (C, N) at dislocations in the deformed and non-deformed austenite. The size of precipitates after continuous cooling of steel was calculated using the additivity rule. Numerical model combines a solution of the finite element method with model of phase transitions. Physical modeling included dilatometric study and rolling of rods made of niobium microalloyed steel. Microstructure studies were also carried out. Developed model allowed the assessment of the influence of precipitation on the progress of phase transition. Verification of model prediction by comparison with the experiments carried out in conditions close to semi-industrial is described in the paper, as well.
W pracy przedstawiono wyniki modelowania fizycznego oraz model numeryczny opisujący kinetykę przemiany fazowej z uwzględnieniem procesu wydzieleniowego węglikoazotku niobu. Proces ten silnie wpływa na zmiany zachodzące w mikrostrukturze tych stali w trakcie obróbki cieplno - plastycznej. Do symulacji numerycznej procesu wydzieleniowego wykorzystano model Dutty-Sellarsa opisujący kinetykę procesu wydzieleniowego Nb(C, N) na dyslokacjach w austenicie odkształconym i nieodkształconym. Wielkość wydzieleń w warunkach ciągłego chłodzenia stali obliczona została z wykorzystaniem reguły addytywności. Model numeryczny łączy rozwiązanie metodą elementów skończonych z modelem przemian fazowych. Modelowanie fizyczne obejmowało badania dylatometryczne oraz walcowanie prętów ze stali z mikrododatkiem niobu uzupełnione badaniami mikrostruktury. Opracowany model pozwolił na ocenę wpływu procesu wydzieleniowego na postęp przemiany fazowej. Wyniki modelowania zweryfikowano doświadczalnie w warunkach zbliżonych do półprzemysłowych.
Źródło:: Archives of Metallurgy and Materials; 2011, 56, 3; 731-742
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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