摘要
A research on fabrication of finegrained Al2O3 ceramic at lower sintering temperature was carried out. Al2O3 powder with 50 nm in diameter is compounded with 11.24%Al and 4.75%Fe（mass fraction） by high-energy ball-milling. Al is got from Al powder which is a component of the materials being milled and Fe from steel milling balls and milling jar during the milling. In this way, nearly no impurity is brought into the composite powder during milling. With hot pressing of the composite powder and pure Al2O3 powder, it is proved that Al2O3 powder can be densified at lower sintering temperature when the powder is compounded in this way. Al2OC and AlFe form during sintering process of the composite powder. With the reactive sintering and multiphase sintering mechanisms, finegrained Al2O3 ceramic is fabricated at low sintering temperature.
A research on fabrication of finegrained Al_2O_3 ceramic at lower sintering temperature was carried out. Al_2O_3 powder with 50 nm in diameter is compounded with 11.24%Al and 4.75%Fe(mass fraction) by high-energy ball-milling. Al is got from Al powder which is a component of the materials being milled and Fe from steel milling balls and milling jar during the milling. In this way, nearly no impurity is brought into the composite powder during milling. With hot pressing of the composite powder and pure Al_2O_3 powder, it is proved that Al_2O_3 powder can be densified at lower sintering temperature when the powder is compounded in this way. Al_2OC and AlFe form during sintering process of the composite powder. With the reactive sintering and multiphase sintering mechanisms, finegrained Al_2O_3 ceramic is fabricated at low sintering temperature.
出处
《中国有色金属学会会刊：英文版》
CSCD
2005年第2期247-251,共5页
Transactions of Nonferrous Metals Society of China
基金
Project(2001AA421160) supported by the Hi tech Research and Development Program of China
关键词
烧结工艺
氧化铝陶瓷
纳米复合粉末
高能球磨研磨
finegrained Al_2O_3 ceramic
sintering
nanometer Al_2O_3-Al-Fe composite powder
high-energy ball-milling
strength
toughness
