Preparation and thermal shock characterization of yttrium doped tungsten-potassium alloy
Preparation and thermal shock characterization of yttrium doped tungsten-potassium alloy
复制标题
掺钇钨钾合金的制备及热震性能
DOI：
10.1016/j.jallcom.2016.05.010
复制
发表时间：
2016-11-25
影响因子：
6.2
通讯作者：
Tang, Jun
中科院分区：
文献类型：
--
作者：
He, Bo;Huang, Bo;Tang, Jun
采用放电等离子烧结（SPS）技术，以细晶钇掺杂钨钾（W-K）粉末为原料，制备了新型钨基W-K-Y合金。对烧结样品的相对密度、显微组织、硬度和抗热震性能进行了表征。随着Y掺杂量的增加，晶粒尺寸减小，硬度增加。在0.37GW/m2热负荷下的热震试验表明，与传统的工业W-K合金相比，低钇掺杂（0.05wt%、0.1wt%和0.5wt%）的W-K-Y合金的抗热震损伤性能有所提高，而高钇掺杂（1wt%）的W-K-Y合金易产生裂纹。本研究为通过复合调谐优化钨基面向等离子体材料的制备提供了有益的信息。(C)© 2016 Elsevier B. V.版权所有。
Novel tungsten-based W-K-Y alloys were sintered by spark plasma sintering (SPS) method using fine-grained yttrium doped tungsten-potassium (W-K) powder. The relative density, microstructure, hardness and the resistance to thermal shock damage of the sintered samples were characterized. With the enhanced Y doping, the grain size decreased and the hardness increased. Thermal shock test under 0.37 GW/m(2) heat load showed that low yttrium doping (0.05 wt%, 0.1 wt% and 0.5 wt%) in W-K-Y alloys can improve the resistance to thermal shock damage comparing with traditional commercial W-K, while high yttrium doping (1 wt%) easily leads to crack formation. This study will provide helpful information to optimize the preparation of tungsten-based plasma facing materials through composite tuning. (C) 2016 Elsevier B.V. All rights reserved.