粉末冶金技术2009，Vol.27Issue(5)：369-372,4.
纳米AlN粉末的低温热压
Hot press sintering of nano-sized AlN powders at low temperature
摘要
Abstract
Ultrafine nano-sized AlN powders were hot pressed at low temperature of 1 500 - 1 700℃ and mechanical properties were investigated. β-AlN and β-Al_2O_ are detected when the hot pressing temperature is 1 600℃. The phase transition β-AlN to α-AlN was discovered at a 1 700℃ hot pressing temperature. Relative density and average grain size were increase with the increasing of hot pressing temperature, and fracture form is intercrystalline crack at 1 500℃ and transcrystalline crack at 1 700℃. Relative density of 97. 3% , average grain size of 850nm. Vickers hardness of 15. 54GPa and fracture toughness of 3. 5MPa · m~(1/2) are obtained at 1 700℃.关键词
纳米AlN/热压/力学性能Key words
nano-sized aluminium nitride/ hot pressing/ mechanical properties分类
矿业与冶金引用本文复制引用
张春祥,骆俊廷,李洪波..纳米AlN粉末的低温热压[J].粉末冶金技术,2009,27(5):369-372,4.基金项目
中国博士后科学基金资助项目(20060400787) （20060400787）
