稀土Ce和变形参数对SiC_p/Al复合材料热变形的影响  

Effect of rare earth Ce and deformation parameters on hot-deformation of SiC_p/Al composites

作　　者：邬富宝[1] 李文学[1] 

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010

出　　处：《轻合金加工技术》2012年第1期51-54,共4页Light Alloy Fabrication Technology

摘　　要：制备了SiC质量分数为5%、8%,Ce质量分数为0.05%的SiCp/Al复合材料。利用Gleeble-1500热模拟试验机,在不同变形温度、变形速率下进行压缩试验,研究了稀土Ce对SiCp/Al复合材料热变形行为的影响。结果表明,SiC质量分数为8%的SiCp/Al复合材料在低温高应变速率条件下发生了动态再结晶。同样条件下,高应变速率的复合材料动态再结晶晶粒比低应变速率下的细小。稀土元素Ce对SiCp/Al复合材料具有明显的强化作用,并且稀土元素Ce能抑制复合材料的动态再结晶。The SiCp/Al composites made both from（mass fraction）5% and 8% of SiC with 0.05% of Ce have been produced. The composites have been compressed on Gleeble- 1500 thermal simulator with strain rates of 0.01 s-1 and 0.1 s-1 at 350℃ and 450℃ separately in order to study the effect of Ce on hotdeformation of SiCp/Al composites. The results show that SiCp/Al composite with 8% Of sic happened dynamic re-crystallization under low temperature and high strain rate. The re-crystal grains of the composites under high strain rates are finer than that obtained under lower strain rates with the same other conditions. Rare earth Ce can strongly strengthen the SiCp/Al composites and hinder the dynamic re-crystallization of the composite.

关 键 词：稀土Ce 复合材料 热变形 动态再结晶 

分 类 号：TB333[一般工业技术—材料科学与工程]