摘要
以W,C,Co为原料粉末,经机械活化-反应热处理工艺制备纳米晶WC-Co复合粉末。结果表明:活化粉末的固相反应具有以下特征:反应温度低,反应速度快。在800℃热处理时已有大量WC生成。在850℃保温25minW2C完成了向WC的转化。经900℃保温35min制备了晶粒尺寸为30.5nm的WC-Co复合粉末。
The raw materials W, C, Co powders were used by mechanical activation-reaction heat treatment to prepare nanocrystalline WC-Co composite powders. It is shown that the activation powders have low reaction temperature and fast reaction speed. At 800 ℃ much WC is formed. At 850 ℃ and heat treating for 25 min W2C turns to WC. At 900 ℃ heat treating for 35 min WC-Co composite powder with size grain of 30. 5 nm is obtained.
出处
《粉末冶金材料科学与工程》
EI
2004年第1期60-64,共5页
Materials Science and Engineering of Powder Metallurgy
关键词
机械活化
反应热处理
纳米晶
WC-Co复合粉末
mechanical
activation
reaction heat treatment
nanocrystalline
WC-Co composite powder
