摘要
A l-9.21%S i亚共晶铝硅合金在5.5 GPa高压下凝固,获得接近单一α相的超高过饱和固溶体.对超过饱和固溶体进行时效处理,获得了弥散分布的细颗粒S i相,合金的性能有非常大的提高.分析了时效处理温度和保温时间对析出组织的影响.高压凝固获得超高过饱和固溶体后进行时效处理,有可能成为制备某些特殊材料的新方法.
Hypoeutectic Al-9. 21% Si alloy was solidified under a pressure of 5. 5 GPa and an altra-high supersatuated solid solution with nearly single a phase has been attained. The solid solution then under went ageing treatment and dispersed and fine Si particles were formed, resulting in an obvious improment in mechanical properties of the alloy. The effect of ageing time on the precipitation micrstructure were also analyzed in the paper. It might become a new method for preparing some special materials to attain ulltrahigh supersatuated solid solution by using high pressure solidification first and then to carry out ageing treatment.
出处
《材料与冶金学报》
CAS
2006年第1期61-63,共3页
Journal of Materials and Metallurgy
基金
国家自然科学基金资助项目(59571040)
关键词
高压凝固
AL-SI合金
过饱和固溶体
时效组织
性能
solidification at high pressure
Al-Si alloy
extended solid solution
aged structure
properties
