کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1603473 | 1515979 | 2013 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sintering of NbC0.95 - CryCz composite materials
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A study on the preparation technique of composites in the NbC0.95 - CryCz system is presented. It was found that, in comparison to samples of pure niobium carbide, chromium carbide additives lead to a decrease of the temperature at which shrinkage of the powder compacts starts. At temperatures lower than the temperature of the beginning of shrinkage, solid solutions of Cr and Nb carbides form. Microstructural observations indicate that a liquid phase appears at temperatures higher than the melting point of chromium carbide. It penetrates the niobium carbide matrix grain boundaries. This liquid phase improves densification of the systems and accelerates grain growth. In order to obtain fine-grained materials very high heating rate is necessary. Fully densified composites were received when the rate of temperature increase was equal to 30 °C/min.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 41, November 2013, Pages 614-621
Journal: International Journal of Refractory Metals and Hard Materials - Volume 41, November 2013, Pages 614-621
نویسندگان
P. Rutkowski,