کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8948530 | 1645669 | 2018 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Phase stability and microstructural formations in the niobium carbides
ترجمه فارسی عنوان
پایداری فاز و تشکیلات میکرو سازنده در کاربید نایوبیم
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
The phase stability and microstructural formations for a series of hot isostatically pressed (HIP) NbCx compositions was investigated. Based on the composition, single-phase B1 (Fm3¯m) NbC or (P3¯1m) βâNb2C equiaxed grains were observed as well as β-Nb2C lath precipitation within NbC. Particular discussion is given to the complexities of X-ray and electron diffraction for proper identification for the various poly-types of Nb2C that have been computationally predicted. The phase transformation pathways for these microstructures was revealed by a NbC-Nb diffusion couple from the HIP powders. The migration of vacancies towards the NbC side resulted in a refinement of the NbC grains whereas carbon's migration into the Nb formed an uniform and distinct reaction front with a mixture of β-Nb2C and Nb grains. This latter microstructure suggests carbon's reaction through the matrix grain is as significant in the conversion process as is the precipitation of β-Nb2C at the grain boundaries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 15, December 2018, Pages 4850-4866
Journal: Journal of the European Ceramic Society - Volume 38, Issue 15, December 2018, Pages 4850-4866
نویسندگان
Chase J. Smith, Christopher R. Weinberger, Gregory B. Thompson,