کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1447870 988658 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of boron on the microstructure and thermal stability of directionally solidified NiAl–Mo eutectic
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Effects of boron on the microstructure and thermal stability of directionally solidified NiAl–Mo eutectic
چکیده انگلیسی

Microalloying with 0.01 at.% B decreases the range of growth speeds over which a well-aligned fibrous eutectic microstructure can be obtained in directionally solidified NiAl–Mo. Compared to the undoped alloy, the size/spacing of the Mo fibers is larger, and the fiber density smaller, in the B-doped alloy. Annealing at 1400 °C coarsens the fibers by a mechanism involving fault migration and annihilation driven by diffusion along the fiber–matrix interface. The coarsening kinetics, given by the decrease in Mo fiber density with time, is exponential, and microalloying with B decreases the coarsening rate.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 58, Issue 2, January 2010, Pages 421–428
نویسندگان
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