摘要
为了制备具有低热膨胀系数和较高强度的复合材料,选用具有负体膨胀系数的β-锂霞石颗粒和高强度的硼酸铝晶须作为复合材料组分,用挤压铸造法制备了6061铝基复合材料,并对该复合材料的显微结构、拉伸性能和热膨胀性能进行了研究.结果表明,该复合材料能同时获得较低的热膨胀系数和较高的强度;通过改变复合材料中β-锂霞石和硼酸铝的体积分数,在较大的范围内可以对复合材料的强度和热膨胀系数进行设计和调节.
In order to obtain a composite with low coefficient of thermal expansion (CTE) and high stress, a new composite containing β-eucryptite particle which has a negative CTE and aluminum borate whisker (ABO) which has high strength was produced by squeeze casting technique. The microstructure, fracture property and thermal expansion property of the composite were studied. Low thermal expansion and high tensile strength were attained simultaneously in the composite. By changing the volume fraction of β-eucryptite and ABO, the strength and the CTE of the composite can be designed and adjusted.
出处
《材料科学与工艺》
EI
CAS
CSCD
2003年第4期372-374,共3页
Materials Science and Technology
关键词
铝基复合材料
锂霞石颗粒
硼酸铝晶须
热膨胀系数
CTE
low coefficient of thermal expansion
high strength
β-eucryptite
aluminum borate whisker
aluminum matrix composite
