کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7989525 | 1515943 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure and phase evolution of ceramic layers on Ta-2.5W alloy
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
A Ta-N ceramic layer on the surface of a Ta-2.5W alloy was synthesized by ion nitrocarburizing to improve its surface mechanical properties. Two processing parameters, temperature and holding time, were respectively investigated of the effects on the phase evolution of the ceramic layer. At 800â¯Â°C, only a single diffusion layer consisting of α-Ta (solution of nitrogen) was present. When temperature was raised to 900â¯Â°C and 1000â¯Â°C, a compound layer, mainly composed of θ-TaN phase, was formed to replace the upper part of the diffusion layer, resulting in the dramatic improvement of surface hardness. The thickness of compound layer increased with holding time and approached 20â¯Î¼m for the sample processed at 1000â¯Â°C for 3â¯h, corresponding to the optimal microhardness properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 75, September 2018, Pages 25-29
Journal: International Journal of Refractory Metals and Hard Materials - Volume 75, September 2018, Pages 25-29
نویسندگان
Li He, Xinhong Xiong, Qiaoxin Zhang, Chao Zhu, Jialin Chen, Yongjie Lei,