SiCp/Al-8.5Fe-1.3V-1.7Si复合材料的显微组织及室温力学性能

中国有色金属学报, 2007, 17(6): 858-864.

SiCp/Al-8.5Fe-1.3V-1.7Si复合材料的显微组织及室温力学性能

陈振华 ^1, , 贺毅强 ^2, , 陈志钢 ^3, , 尹显觉 ^4, , 陈刚 ^5,

1.湖南大学,材料科学与工程学院,长沙,410082

2.湖南大学,材料科学与工程学院,长沙,410082

3.湖南大学,材料科学与工程学院,长沙,410082

4.湖南大学,材料科学与工程学院,长沙,410082

5.湖南大学,材料科学与工程学院,长沙,410082

基金项目: 国家自然科学基金(50304008)

关键词： Al-8.5Fe-1.3V-1.7Si/SiC复合材料 , 多层喷射沉积 , 室温力学性能 , 显微组织

Microstructure and ambient temperature mechanical properties of SiCp/Al-8.5Fe-1.3V-1.7Si composite

研究了多层喷射沉积SiCP/Al-8.5Fe-1.3V-1.7Si复合材料通过挤压后再轧制以及模压致密后再轧制的显微组织特点及其室温力学性能.通过金相显微镜、X射线衍射仪、扫描电镜和透射电镜观察在加工过程中复合材料的显微组织,分析显微组织密度对室温力学性能的影响.结果表明:通过挤压后再轧制以及模压后再轧制的SiCp/Al-8.5Fe-1.3V-1.7Si复合材料具有突出的室温性能,其中通过挤压后轧制板材的室温抗拉强度(σb)达555 MPa,模压后轧制得到的板材室温抗拉强度(σb)达620 MPa;分析认为其突出的室温性能主要得益于复合材料中的颗粒状SiC的颗粒增强以及材料中弥散析出的Al13(Fe, V)3Si相、喷射沉积工艺得到基体材料的细小晶粒(约800 nm)、通过大量变形形成晶粒内和晶界附近的位错缠结以及喷射原始颗粒边界氧化皮的破碎而产生的强化.

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