Spark Plasma Sintering Behavior of 93W-5.28Ni-1.32Fe-0.4Y2O3 Heavy Alloy Powders
Spark plasma sintering (SPS) method was used to consolidate ultra-fine and mixed 93W-5.28Ni-l.32Fe-0.4Y2O3 (wt pct) powders,and the effects of sintering parameters on the densification degree and the performance of the as-sintered materials were investigated.Results showed that the SPS densification process could be divided into four stages.Compacts were densified rapidly at the stage Ⅲ and a proper holding time promoted W diffusing into fcc-type Ni-Fe based solution.Heating rate and sintering time had a great influence on densification.When the powders were heated at a rate of 100℃/min to 1230℃ and then held for 5min,the density,hardness and transverse rupture strength of the as-sintered material reached the optimum,being 17.18 × 103kg/m3,41.4HRC and 935.1MPa,respectively.Its corresponding fracture morphology was characterized as intergranular rupture of W-W,and accompanied with some transgranular cleavage of tungsten grain.
spark plasma sintering tungsten heavy alloy sintering behavior Y2O3
Ke Hu Xiaoqiang Li Shengguan Qu
School of Mechanical & Automotive Engineering, South China University of Technology,Guangzhou, 510640, Peoples Republic of China
国际会议
重庆
英文
2762-2768
2010-12-11（万方平台首次上网日期，不代表论文的发表时间）