Ti_3AlC_2与Al在873～973K的高温反应  

High Temperature Reaction Between Ti_3AlC_2 and Al Sintering at 873～973 K

作　　者：王垒[1] 谷万里[1] 

机构地区：[1]山东理工大学机械工程学院,山东淄博255049

出　　处：《热加工工艺》2012年第8期32-34,共3页Hot Working Technology

摘　　要：以三元层状陶瓷材料Ti3AlC2与Al粉为原料进行无压真空烧结。通过改变烧结温度、保温时间及原料配比,研究了反应的过程及生成相。采用XRD、SEM分析了反应产物和界面。研究表明:Ti3AlC2与Al在923 K条件下保温120 min后有明显的新相生成,产物为Al3Ti、Al4C3;延长保温时间及升高温度有利于反应的发生,反应可用以下方程进行描述:Ti3AlC2+Al→Al3Ti+Al4C3;反应中Al元素向Ti3AlC2中扩散,在Ti3AlC2与Al之间形成了明显扩散层。The reaction between Ti3A1C2 and A1 was researched. By changing the sintering temperature, holding time and the molar ratio of raw materials, the reaction products, reaction process and interface were analyzed by XRD and SEM, respectively. The results show that the new phase A13Ti and Al4C3 emerges when sintering at 923 K for 120 min. The reaction can be described as： Ti3AlC2 ＋ Al→A13Ti ＋ Al4C3. The diffusion of Al into Ti3AlC2 forms obvious reaction layer.

关 键 词：三元层状陶瓷材料 TI3ALC2 无压真空烧结 扩散层 

分 类 号：TB331[一般工业技术—材料科学与工程]