快速凝固和直流电处理对铝硅合金中硅形态的影响  

INFLUENCE OF RAPID SOLIDIFICATION AND DIRECT CURRENT TREATMENT ON THE GROWN MORPHOLOGIES OF EUTECTOID SILICON IN Al-Si ALLOYS

作　　者：刘玉先[1] 侯绪荣[1] 刘相法[1] 尚蕾 

机构地区：[1]山东工业大学,济南250014

出　　处：《理化检验（物理分册）》1996年第1期19-21,32,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：用氮气雾化法制取了Al-12.54%Si合金微粒并进行700℃重熔处理,对加Sr变质的Al-13.23%Si合金熔体进行了直流电处理.用扫描和透射电镜研究了不同处理条件对Al-Si合金中共晶硅生长形态的影响.结果表明,快速凝固法制取的合金微粒与重熔处理试样中,共晶硅呈球状和条状.加Sr变质的共晶硅为弯扭的纤维状,直流电熔体处理后共晶硅转变为圆球状,其颗粒尺寸为50～200nm.The particles of Al-Si alloy with 12. 54 percent of silicon were produced with the method of atomiza-tion. These particles were heated to 700℃and re-melted. Al-13. 23% Si alloy with modified flux Sr was direct current treated. The effect of different processing condition on the morphologies of eutectoid silicon in Al-Si alloy was investigated with TEM and SEM. The results showed that in aiomized particles or re-melted samples the morphologies of eutectoid silicon were spheroidal or ribbon and in samples modified with Sr,the morphologies of eutectoid silicon were curved fiber-shaped. After direct current treatment,cute oid silicon took the shape of spheroid. The particle size was within 50-200nm.

关 键 词：快速凝固 直流电处理 硅形态 铝硅合金 

分 类 号：TG146.21[一般工业技术—材料科学与工程]