Hot press Sintering Behavior of Nano-sized AlN Powders
Aluminum nitride (AlN) is a stoichiometric compound with the hexagonal wurtzite structure.A1N has excellent thermal conductivity and good properties as electronic insulator.It displays good mechanical resistance up to elevated temperatures and is resistant against corrosion by molten metals.Bulk A1N may therefore be used as a refractory structural material as well as a substrate for high power microelectronic devices.However,it is very difficult for sintering high-density AlN at lower temperature than 1800℃.Nano-sized AlN powders were sintered by hot press sintering at low temperature of 1500~1700 ℃ and mechanical properties were investigated.β-AlN and β-Al2O3 were detected when the sintering temperature is 1600 ℃.The phase transition β-AlN to α-AlN was discovered at a 1700℃ sintering temperature.Relative density and average grain size were increasing with the increasing of sintering temperature,and fracture form is intercrystalline crack in 1500℃ and transcrystalline crack in 1700℃.97.3% relative density and 850nm average grain size were deserved at 1700℃.
Nano-sized aluminum nitride hot press sintering low temperature
Li Hongbo Luo Junting Gu Yongfei Xu Yanxia
College of Mechanical Engineering, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004,China
国际会议
The Sixth China International Conference on High-Performance Ceramics(第六届中国先进陶瓷国际研讨会(CICC-6))
哈尔滨
英文
720-722
2009-08-16（万方平台首次上网日期，不代表论文的发表时间）