Microstructure and Mechanical Properties of W-9.5Ni₃Al-0.5YF₃ Alloy Prepared by SPS

W-9.5Ni₃Al-0.5YF₃ alloy was prepared by ball milling and spark plasma sintering (SPS). The effects of sintering temperature on the densification,phases,microstructure and mechanical properties of the alloy were analyzed. The results show that the distribution of YF₃ in the bonded phase is beneficial to reduce the densification sintering temperature of the alloy. The in-situ generated Al₂O₃ can play a role in refining the grains and enhancing the mechanical properties. The flexural strength,hardness,densification and grain size of the alloy at 1250 ℃are 982.8 MPa,72.8 HRA,99.5%and 1.53 μm,respectively,and the alloy has good overall mechanical properties.