摘要
用粉末，台金法制备W-La2O3合金，在高能电子束轰击下对其进行高温热负荷循环模拟试验。结果表明，在8Mw／m。（脉冲2s）条件下，w-La2O3合金经受100次热负荷循环后，表面出现有微观裂纹，微裂纹沿钨晶粒晶界呈现出网状，微裂纹并未扩展形成宏观裂纹，表面无明显损伤。电子束热负荷循环后W-La2O3合金组织结构变化不明显。热负荷循环未造成材料的熔化飞溅和蒸发，质量并未出现明显变化。W-La2O3合金表面熔融，硬度值增加，基体硬度未出现较大变化。
W-La2O3 alloy was prepared by powder metallurgy method. A high heat load cycling simulation experiment was carried out by high energy beam radiation. The results show that microcracks appear on the surface of W-La2O3 alloy after 100 cycles with heat flux of 8MW/m^2（pulse length of 2s）. Microcracks have a reticulation structure around tungsten grain boundaries, and don＇t form marocracks. The microstructure of W-La2O3 alloy after heat load cycling has no obvious change. There is no splash and evaporation during heat load cycling experiment, so there is little mass change. The hardness of surface increases, but hardness of the matrix below surface keeps its original level after heat load cycling experiment.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2007年第A04期1669-1671,共3页
Journal of Functional Materials
基金
基金项目：合肥工业大学中青年创新群体基金资助项目（103-037016）
中科院等离子体物理研究所合作项目（103-413361）
