کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7989975 1515958 2016 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The study on low temperature sintering of nano-tungsten powders
ترجمه فارسی عنوان
مطالعه روی پختن پودر نانو تنگستن با دمای پایین
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی
Ultrafine grain tungsten is a promising candidate for plasma facing component applications in future fusion reactors. The conventional press-and-sinter powder metallurgy method is a preferred route for producing ultrafine grain tungsten from nanosize tungsten powders. However, controlling grain growth, while simultaneously attempting to achieve maximum densification, has been a challenge for making UGF tungsten by sintering. In this study, the effect of processing parameters on the densification and grain growth of nano-W powders was investigated. Near-fully densified tungsten was obtained at sintering temperatures between 1100 and 1300 °C, and both Ar and H2 sintering atmospheres were investigated. The Ar sintering atmosphere was determined to more favorably promote densification and minimize grain growth. The nanosized tungsten powder compacts were subjected to reduction in H2 as a part of the sintering cycle. The reduction temperature was found to have significant effects on the sintering of nano-W powder, primarily as a result of grain coarsening, which was seen at temperatures as low as 700 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 61, December 2016, Pages 273-278
نویسندگان
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