ZrO_(2)对钼铼合金微观组织与性能的影响  

Effect of ZrO_(2) on Microstructure and Properties of Molybdenum-Rhenium Alloy

作　　者：王广达[1,2] 任雪婷 熊宁[2] 况春江[2] Wang Guangda;Ren Xueting;Xiong Ning;Kuang Chunjiang(Central Iron and Steel Research Institute,Co.,Ltd,Beijing 100081,China;Advanced Technology&Materials Co.,Ltd,Beijing 100094,China)

机构地区：[1]钢铁研究总院有限公司,北京100081 [2]安泰科技股份有限公司,北京100094

出　　处：《稀有金属材料与工程》2024年第5期1355-1362,共8页Rare Metal Materials and Engineering

基　　金：科技部重点研发计划项目(2022YFB3705400)。

摘　　要：钼铼合金具有优良的力学性能和机加工性能,是电子、核工业等领域关键的结构材料。在钼铼合金中加入ZrO_(2),形成弥散强化作用,并结合形变强化来提高材料的力学性能。研究发现,合金粉粒度随着ZrO_(2)含量的增加而减小,在质量分数为0.7%时晶粒尺寸最细小均匀;ZrO_(2)颗粒在合金的变形和断裂过程中表现出钉扎效应,显著提升合金的抗拉强度、屈服强度和断后延伸率等力学性能;ZrO_(2)强化钼铼合金的抗拉强度和断后延伸率在ZrO_(2)含量为0.7%时达到最高值,随后减少;ZrO_(2)基本弥散分布在晶界处并与钼基体形成良好结合界面,可以抑制晶界的迁移,提高钼合金的变形抗力。Molybdenum-rhenium alloy has excellent mechanical and machining properties,and is a key structural material in fields such as electronics and nuclear industry.Adding zirconia to molybdenum rhenium alloy forms dispersion strengthening effect;when the effect is combined with deformation strengthening,the mechanical properties of the material can be improved.The particle size of the alloy powder decreases with the increase in ZrO_(2) content,with the smallest and most uniform grain size at a content of 0.7wt%.ZrO_(2) particles exhibit a pinning effect during the deformation and fracture process of the alloy,significantly improving its mechanical properties such as tensile strength,yield strength,and elongation.The tensile strength and elongation of ZrO_(2) strengthened molybdenum-rhenium alloy reach the highest value when the ZrO_(2) content is 0.7%,and then decrease;ZrO_(2) is basically dispersed at grain boundaries and forms a good bonding interface with the molybdenum matrix,which can inhibit the migration of grain boundaries and improve the deformation resistance of molybdenum alloys.

关 键 词：钼铼合金 ZrO_(2) 弥散强化 微观组织 力学性能 

分 类 号：TG146.412[一般工业技术—材料科学与工程]