高能球磨制备立方AlN及其高温相变  

Cubic AlN Synthesized by High Energy Ball Milling and Its Phase Conversion at High Temperature

作　　者：李鹏亮[1] 周敬恩[1] 席生岐[1] 

机构地区：[1]西安交通大学材料科学与工程学院金属材料强度国家重点实验室,西安710049

出　　处：《无机材料学报》2006年第4期821-827,共7页Journal of Inorganic Materials

基　　金：高等学校博士点基金(20040698053);教育部科学技术研究重点项目(105159)

摘　　要：研究了高能球磨过程中Al2O3的相变,随着球磨时间的延长,粉末中发生了γ-Al2O3向α—Al2O3的转变．高能球磨20h,Al2O3部分非晶化,同时,有立方AIN生成．增加球磨强度,立方AIN生成量增加,650r／min高能球磨40h,AlN生成量达到72％．随后的氮气气氛退火实验发现,在500℃以上,立方氮化铝与氧化铝反应,生成AlON相．AlON相的生成,有效地降低了碳热还原氮化反应激活能．The phase conversion of Al2O3 during high-energy ball milling was investigated. After 20h milling, amorphous and A1N were observed in powders, these were not reported previously. The crystal structure of A1N gained during ball milling is cubic, differs from that of the regular hexagonal A1N synthesized with carbothermal reduction. AION phase forms by the reaction of cubic A1N and γ-Al2O3 after annealing in N2 atmosphere at the temperature above 500℃. The formation of AION phase decreases the commencing temperature of A1N.

关 键 词：立方氮化铝 氧化铝 高能球磨 AION 

分 类 号：TQ174[化学工程—陶瓷工业]