混合稀土变质对Zn-27Al-Si合金组织和力学性能的影响  

Effect of the Mixed RE Modifier on Microstructure and Properties of Zn-27Al-Si Alloy

作　　者：韩富银[1] 刘春莲[1] 赵浩峰[1] 

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《稀土》2004年第3期26-28,38,共4页Chinese Rare Earths

摘　　要：通过试验和分析,发现稀土对Zn-27Al-Si合金中初晶硅的变质机理是稀土吸附在硅晶体生长表面,抑制了硅的生长,从而产生较大的过冷,使硅晶体细化。试验结果还表明由于硅晶体的细化使合金的力学性能得到显著提高。Through test and analysis we found the modification mechanism of RE to primary crystal silicon of the Zn-27Al-Si.RE was adsorbed in the growing surface of the silicon crystals,resulting in restraining growth of silicon and higher super-cooling,so silicon crystals were fined. The results also suggest the mechanical properties of alloy improved obviously because of the fined silicon crystals.

关 键 词：稀土 Zn-27Al-Si合金 变质机理 力学性能 

分 类 号：O614.33[理学—无机化学] TG146[理学—化学]