稀土氧化物强化钨铼合金的制备与力学性能研究  

Preparation and Mechanical Properties of Rare Earth Oxide Reinforced Tungsten-Rhenium Alloys

作　　者：邓晓舟 马帅 吴壮志[1] 王德志[1] DENG Xiaozhou;MA Shuai;WU Zhuangzhi;WANG Dezhi(School of Materials Science and Engineering,Central South University,Changsha 410083,Hunan,China)

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《中国钼业》2024年第4期54-59,共6页China Molybdenum Industry

基　　金：国家重点研发计划(编号:2022YFB3705402)。

摘　　要：采用快速热压烧结技术制备稀土氧化物掺杂钨铼合金,对比研究添加不同种类稀土氧化物对钨铼合金微观组织和力学性能的影响,并分析讨论其强化机理。结果表明:稀土氧化物不仅能提高钨铼合金的相对密度和强度,还能减小钨铼合金的晶粒尺寸。在3种稀土氧化物中,氧化钇的强化效果最明显。W-3%Re-0.8%Y_(2)O_(3)(质量分数,下同)的相对密度为95.5%,硬度为412.5 HV1,变形量到50%时压缩强度为3158 MPa,对比合金基体(W-3%Re),分别提高了3.1%、49.0%和24.0%。另外,W-3%Re-0.8%Y_(2)O_(3)的平均晶粒尺寸仅为5.8μm,比合金基体降低了约63.6%。Rare earth oxide-doped tungsten-rhenium alloy was prepared using fast hot pressed sintering technique.A comparative study was conducted to investigate the effect of adding different types of rare earth oxides on the microstructure and mechanical properties of the sintered tungsten-rhenium alloy,as well as to analyze and discuss its strengthening mechanism.The results indicate that rare earth oxides can improve the relative density and strength of the tungsten-rhenium alloy while reducing the grain size.Among the three types of rare earth oxides,yttrium oxide shows the most significant strengthening effect.For W-3wt%Re-0.8 wt%Y_(2)O_(3),the relative density is 95.5%,hardness is 412.5 HV1,and compressive strength reaches 3158.0 MPa at 50%deformation,representing increases of 3.1%,49.0%,and 24.0%compared to the alloy matrix(W-3wt%Re).Additionally,the average grain size of W-3wt%Re-0.8wt%Y_(2)O_(3) is 5.8μm,which is approximately 63.6%lower than that of the alloy matrix.

关 键 词：快速热压烧结 钨铼合金 稀土氧化物 压缩强度 

分 类 号：TG146.41[一般工业技术—材料科学与工程]