【作者】 陈勇； 吴玉程； 于福文； 陈俊凌； 种法力；

【Author】 CHEN Yong~1 WU Yu-cheng~1 YU Fu-wen~1 CHEN Jun-ling~2 CHONG Fa-li~2 (1 School of Materials Science and Engineering,University of Technology Hefei,Hefei 230009,China; 2.Institute of Plasma Physics,Chinese Academy of Science,Hefei 230031,China)

【机构】 合肥工业大学材料科学与工程学院； 中国科学院等离子体物理研究所；

【摘要】 用粉末冶金法制备 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/m²（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．更多还原

【Abstract】 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/m²（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.更多还原