Gasar规则多孔合金气孔析出机制研究  

Research on Precipitation Mechanism of Porosity in Porous Alloy Based on Gasar Rules

作　　者：宋群玲[1,2] 金青林[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]昆明冶金高等专科学校冶金材料学院,云南昆明650033

出　　处：《铸造技术》2017年第8期1913-1917,共5页Foundry Technology

基　　金：国家自然科学基金资助项目(51164018);云南省教育厅基金资助项目(2012Y337)

摘　　要：在纯H_2气氛中,采用金属/H_2共晶定向凝固技术制备得到了不同合金成分和气压条件下的多孔Cu-xCr合金,研究了多孔Cu-xCr合金气孔析出机制。结果表明:气孔在Gasar多孔Cu及单相Cu-Cr合金中的晶内和晶界均能形核,而在Gasar多孔亚共晶及过共晶Cu-xCr合金中,气孔在共晶组织上析出和共晶组织协同定向生长。Gasar porous Cu-xCr alloys were fabricated by a metal/hydrogen unidirectional solidification method under different hydrogen gas pressure. Precipitation mechanism of the porosity in porous alloy Cu-xCr for Gasar rules was investigated. The results show that Gasar pores can nucleate in grain and on grain boundaries of Cu and single-phase Cu-xCr alloy. But Gasar pores precipitates in the eutectic structure and directionally grows together with eutectic.

关 键 词：Gasar 多孔Cu-xCr合金 气孔析出 共晶组织 

分 类 号：TG146.11[一般工业技术—材料科学与工程]