在Mo粉中分别添加0.6%、0.8%和1.0%的乙酸镧,通过行星式球磨机混料使其分布均匀,然后压制成型后在1600℃的氢气气氛炉中烧结,采用HVS-1000型显微硬度计,在测试前将试样磨平并抛光,并保证样品上下表面平行,所有的测试压力为1.0 kg,保压时间为10 s,选择试样平整面测硬度。
Lanthanum acetate at 0.6%, 0.8% and 1.0% were added to the Mo powder and mixed by a planetary ball mill to make a uniform distribution, then pressed into shape and sintered in a hydrogen atmosphere furnace at 1600°C. Using a HVS-1000 micro hardness tester, the specimens were ground and polished before testing, and the upper and lower surfaces of the samples were ensured to be parallel, and all the test pressures were 1.0 kg with a holding time of 10 s, and the flat surface of the specimen was selected for hardness measurement.