Al/TiO_2摩尔比对热扩散反应合成的影响  

Influence of Al/TiO_2 Mole Ratio on XD Synthesis of Al-TiO_2 System

作　　者：朱和国[1,2] 王恒志[3] 吴申庆[1] 

机构地区：[1]东南大学材料系 [2]南京理工大学,江苏南京210094 [3]南京理工大学

出　　处：《铸造》2000年第12期879-882,共4页Foundry

摘　　要：本文提出了Al TiO2 系XD合成Al3Ti Al2 O3/Al自生复合材料的微观反应模型 ,分析了不同的Al/TiO2 摩尔比对燃烧过程的影响。原位生成的Al2 O3呈等轴颗粒状 ,尺寸达亚微米级 ;Al3Ti的生成受扩散控制 ,呈棒状 ;随着Al/TiO2 摩尔比的增加 ,燃烧温度降低 ,燃烧时间和体密度增加。Micro reactive model and reacted mechanism of Al TiO 2 system synthesized by XD method were reported.The influence of Al/TiO 2 mole ratio on combustion was also been discussed.The Al 2O 3 particles which were In situ grown were of equiaxed shape and submicron size.The Al 3Ti was formed by diffuse mechanism and of blocky morphology.The various Al/TiO 2 mole ratios had effect on reaction proceeding.The combustion temperature would be decreased but combusted time and bulk shrinkage would be increased with growth of Al/TiO 2 mole ratio.

关 键 词：自生复合材料 铝基复合材料 热扩散 二氧化钛 

分 类 号：TG113[金属学及工艺—物理冶金]