کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1603236 1515977 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Elevated temperature ablation resistance of HfC particle-reinforced tungsten composites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Elevated temperature ablation resistance of HfC particle-reinforced tungsten composites
چکیده انگلیسی
The effects of adding HfC particles on the ablation resistance of HfC-W composites were investigated. An oxy-acetylene torch was used to ablate the samples at high temperature. Ablation resistance improved with an increasing volume fraction of HfC particles, with a value of 15.7 × 10− 3 g/cm2·s at 30 vol.%. The mass ablation rates of the composites were much lower than those of monolithic tungsten. The improvement in ablation resistance was attributed to thermochemical oxidation of the W and HfC particles, forming an HfO2 layer on the surface. The outstanding elevated temperature ablation resistance of HfC-W was attributed to the low thermal conductivity, high oxidation resistance, and high melting point of the HfC reinforcement.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 43, March 2014, Pages 89-93
نویسندگان
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