Preparation and Mechanical Properties of Rare Earth Oxide Reinforced Tungsten-Rhenium Alloys
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 mi-crostructure 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%Y2O3,the relative density is 95.5%,hardness is 412.5 HV1,and compressive strength reaches 3 158.0 MPa at 50%deformation,representing increa-ses 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%Y2O3 is 5.8 μm,which is approximately 63.6%lower than that of the alloy matrix.
fast hot pressed sinteringtungsten-rhenium alloyrare earth oxidescompressive strength
万方数据
维普
