SiC_P/FVS1012薄板微观结构及高温性能的研究  

Microstructures and Elevated Temperature Properties of Heat-resistant SiC_P/FVS1012 Composite

作　　者：陈振华[1] 郝亮[1] 陈鼎[1] 贾冬梅 贺毅强[1] 陈志钢[1] 徐政坤[1] 

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082 [2]涟钢冷轧板厂,湖南涟源417009

出　　处：《湖南大学学报（自然科学版）》2007年第11期56-60,共5页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(50304008)

摘　　要：利用OM,XRD和TEM等方法研究了喷射沉积-挤压-轧制SiC颗粒增强FVS1012(SiCP/FVS1012)薄板的微观结构以及退火对该复合材料硬度的影响.结果表明,本工艺制备的SiCP/FVS1012薄板具有优异的高温力学性能,在315℃时,σb=308 MPa,σ0.2=290 MPa,δ=5.69%;在415℃时,σb=201 MPa,σ0.2=182 MPa,δ=3.65%.微观组织分析表明:类球状细小弥散的Al12(Fe,V)3Si相的生成是该复合材料具有优异高温力学性能的主要原因,此外,SiC颗粒的加入对提高该复合材料的高温力学性能也有重要作用.The microstructures of spray deposition-extrusion-rolling FVS1012 composite sheet strengthened by SiC particles （SiCp/FVS1012） and the effect of annealing on the hardness were investigated by means of OM, XRD,TEM and so on. The results showed that the SiCp/FVS1012 composite sheet possessed excellent elevated temperature mechanical properties, for example, the obtained σb, σ0.2 and δ were 308 MPa, 290 MPa and 5.69% at 315℃, while the figures were 201 MPa, 182 MPa and 3.65% at 415 ℃. The good elevated temperature mechanical properties should be mainly attributed to the formation of spherical Al12 （Fe, V）3 Si dispersed phase particulates in the aluminum matrix. Furthermore, the introduction of SiC particles was also an important factor.

关 键 词：喷射沉积 微观结构 退火 热稳定性 

分 类 号：TG146.2[一般工业技术—材料科学与工程]