摘要
对６０６３铝合金中添加稀土元素后所引起的机械性能、物理性能的变化进行研究，结果表明：稀土相主要分布在晶界，部分存在晶内；热挤压态稀土相周围有大量位错塞积；稀土元素的加入使铝合金晶粒细化、机械性能改善；添加少量的单一稀土Ｌａ能显著提高铝合金的导电导热能力；添加适量富Ｃｅ混合稀土可使２００℃时的热扩散率提高１２％．
he changes of mechanical and physical properties due to the addition of rare earth (RE) into 6063 aluminium alloy have been investigated. Its microstructure is analyzed with a transmission electron microscope (TEM). The results show that most of the RE phases are scattered in the crystal boundary and some in the grain. Many dislocations tangle around the RE phase in hot extrusion alloys. The addition of RE can make the microstructure fine and the mechanical properties better. When minute La is put into 6063 alloy, its electric and thermal conductivity are improved obviously. After putting a proper amount of rich-Ce RE in the alloy the thermal diffusivity at 200℃ increases by 12%.
出处
《天津大学学报》
EI
CAS
CSCD
1995年第3期375-379,共5页
Journal of Tianjin University(Science and Technology)
基金
天津市科学技术委员会自然科学基金
