等离子体辅助球磨活化Al2O3合成AlN  

Synthesis of Al N from Al_2O_3 activated by plasma assisted ball milling

作　　者：戴乐阳[1,3] 张宝剑[1] 林少芬[1] 刘志杰[2] 王文春[2] 

机构地区：[1]集美大学轮机工程学院福建省船舶与海洋工程重点实验室,厦门361021 [2]大连理工大学材料改性教育部重点实验室,大连116024 [3]Department of Materials Science and Engineering,North Carolina State University,Raleigh 27695,USA

出　　处：《中国有色金属学报》2015年第1期171-178,共8页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(51177008);福建省自然科学基金资助项目(E1310036,2013J01202)

摘　　要：利用介质阻挡放电等离子体辅助球磨和普通球磨分别对Al2O3粉末进行活化,研究等离子体辅助球磨活化Al2O3合成Al N的碳热还原反应机制。结果表明:等离子体辅助球磨40 h的Al2O3粉末,在N2气氛中于1400℃下保温4 h可以完成碳热还原反应,全部转化为Al N。经等离子体辅助球磨后,Al2O3的碳热还原反应符合气相反应机制,等离子体辅助球磨活化大大降低Al2O3的后续反应温度,辅助球磨40 h后的Al2O3合成Al N的反应激活能下降到371.5 k J/mol。等离子体的协同效应促使辅助球磨中Al2O3晶体产生更严重的晶格畸变,这是激活Al2O3并促进碳热还原反应的一个重要因素。The synthesis mechanism of AlN by Al2O3powders through carbothermic reduction reaction was investigated, in which the Al2O3powders was activated by plasma assisted ball milling （PM） or by conventional ball milling （CM）. The results indicate that Al2O3powders activated by plasma assisted ball milling for 40 h can be converted to AlN totally through carbothermic reduction reaction when annealed at 1400℃ for 4h in N2. It is gas reaction mechanism for the carbothermic reduction reaction of Al2O3powders after plasma assisted ball milling. The subsequent reaction temperature of Al2O3powders is reduced significantly because the reaction activation energy decreases to 371.5 kJ/mol after plasma assisted ball milling for 40 h. A lot of lattice distortions are generated in Al2O3graindue to the cooperation of plasma and ball milling, which is an important factor for promoting the carbothermic reduction reaction of Al2O3powders activated by plasma assisted ball milling.

关 键 词：AL2O3 等离子体辅助球磨 活化 碳热还原反应 ALN 

分 类 号：TG174[金属学及工艺—金属表面处理]