کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1601836 1005218 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of Ir or Ta Alloying Addition on Interdiffusion of L12–Ni3Al
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Effects of Ir or Ta Alloying Addition on Interdiffusion of L12–Ni3Al
چکیده انگلیسی

Ternary interdiffusion in L12–Ni3Al with ternary alloying additions of Ir and Ta was investigated at 1473 K using solid-to-solid diffusion couples. Average ternary interdiffusion coefficients were determined from an integration of interdiffusion fluxes calculated directly from experimental concentration profiles. The magnitude of D˜¯NiNi and D˜¯AlAl coefficients was determined to be much larger than that of D˜¯IrIr and D˜¯TaTa coefficients. Ir substituting in Ni-site influenced the interdiffusion of Ni significantly, and D˜¯NiIrAl coefficients were determined to be large and positive. On the other hand, Ta substituting for Al influenced the interdiffusion of Al significantly, and D˜¯AlTaNi coefficients were determined to be large and positive. An excellent agreement was found with ternary interdiffusion coefficients determined by Boltzmann–Matano analysis. Profiles of concentrations and interdiffusion fluxes were also examined to estimate binary interdiffusion coefficients in Ni3Al, and tracer diffusion coefficients of Ir (14.7 × 10−16 ± 1.4 × 10−16 m2/s) and Ta (2.6 × 10−16 ± 2.4 × 10−16 m2/s) in Ni3Al.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Intermetallics - Volume 16, Issue 9, September 2008, Pages 1095–1103
نویسندگان
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