摘要
将含石墨、刚玉、硅微粉或方镁石粉等的复合粉体在万能材料试验机上以 15 0MPa的压力压制成圆柱形试样 ,在还原气氛于 14 2 0℃、15 0 0℃和 160 0℃保温 4h ,通过碳热还原氮化法在试样中合成阿隆和赛隆。XRD分析证明 ,在14 0 0℃时出现少量阿隆和AlN多型体赛隆 ,温度继续升高至 160 0℃时合成量增加 ,但赛隆的合成速度远低于阿隆的合成速度 。
The columniform samples are made with the pressure of 150?MPa that contain graphite,Al 2O 3,SiO 2 and MgO powder.With samples heated at 1?420?℃,1?500?℃ and 1?600?℃ for 4 hours,MgAlON and 21R-AlN Sialon are synthesized by carbothermal reduction nitridation in the sample,MgAlON and 21R-AlN Sialon occure at 1?420?℃.With tempreture rising to 1?600?℃,MgAlON and 21R-AlN Sialon are increasing.But the speed of synthesizing of MgAlON is higher than that of Sialon,and the samples containing MgAlON is denser than the ones containing Sialon
出处
《陶瓷》
CAS
2004年第5期27-28,31,共3页
Ceramics
