Al_2O_3/Ti-Al复合材料中Al_2O_3晶须的原位合成  

Formation of Al_2O_3 Whiskers in Al_2O_3/Ti-Al Composites by In-Situ Process

作　　者：吕臣敬[1] 田秀淑[1] 姚少巍[1] 

机构地区：[1]石家庄铁道学院材料分院,河北石家庄050043

出　　处：《材料科学与工程学报》2007年第3期384-387,共4页Journal of Materials Science and Engineering

摘　　要：利用氧对金属Ti、Al粉的部分氧化,原位合成了含有氧化铝晶须的Al2O3/Ti-Al复合材料,通过XRD和SEM等测试手段,发现Al2O3晶须呈网状交叉分布于基体内部的孔隙中。分析了晶须的生成机理,认为氧化铝晶须是通过VLS机理生成,复合材料的原始组成和温度对晶须的显微型貌有直接的影响:随原始组成中铝含量的增加,产物中晶须的数量总体上是在递增的,且发达程度逐渐提高;热处理温度对晶须直径有直接影响,温度升高可以增加晶须直径。By in-situ process Al2O3/Ti-Al composite with Al2O3 whiskers was prepared, in which the Al2O3 was created via AI being semi-oxidized. Most of the whiskers located in the holes of the matrix. Al2O3 whiskers are synthesized via VLS mechanism. The original component of raw material and sintering temperature have effects on its morphology ： with the increase of AI the quantity of Al2O3 whiskers increased, and high sintering temperature can improve the whisker＇s diameter.

关 键 词：Al2O3/Ti-Al 氧化铝晶须 原位合成 

分 类 号：TB333[一般工业技术—材料科学与工程]