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日本防卫厅技术研究本部第一研究所研究了W体积百分率和显微组织对液相烧结W— Ni—Fe合金机械性能的影响。原料粉末使用羰基Ni粉(平均粒径3—5μm)、羰基Fe粉(平均粒径4—6μm)及W粉(平均粒径2—3μm)。将这些粉末在500℃的氧化性气氛中(大气中)焙烧,再在800℃的氢气流中还原,降低氧和碳。用 200MPa压缩力将这些还原后的粉末静压制成粉末压块。然后将粉末压块在1460～1520℃× 24小时、氢气气氛条件下进行液相烧结制成烧结体。再将烧结体进行1200℃×9小时的真空退
Japan Defense Agency Technical Research Department of the first Institute of W volume percentage and microstructure of liquid-phase sintered W-Ni-Fe alloy mechanical properties. As the raw material powder, carbonyl Ni powder (average particle diameter: 3-5 μm), carbonyl Fe powder (average particle diameter: 4-6 μm), and W powder (average particle diameter: 2-3 μm) were used. These powders were calcined in an oxidizing atmosphere at 500 ° C (in the atmosphere) and then reduced in a stream of hydrogen at 800 ° C to reduce oxygen and carbon. These reduced powders were hydrostatically pressed into powder briquettes using a compression force of 200 MPa. The powder compact was then subjected to liquid-phase sintering at 1460 to 1520 ° C for 24 hours under a hydrogen atmosphere to obtain a sintered body. The sintered body was then evacuated at 1200 ° C for 9 hours