喷射沉积SiCP /FVS1212复合材料微观结构及高温性能的研究
Investigation on Microstructure and Elevated Temperature Properties of SiCP / FVS1212 Composite Prepared by Spray-deposition
徐政坤1, 卢端敏1, 贺毅强2
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作者单位：1. 张家界航空工业职业技术学院, 湖南 张家界 427000; 2. 淮海工学院 机械工程学院, 江苏 连云港 222000
中文关键字：喷射沉积； 微观结构； 高温性能； 热稳定性
英文关键字：spray deposition; microstructure; elevated temperature properties; thermal stability
中文摘要：研究了喷射沉积-热压-轧制SiCP /FVS1212复合材料的微观结构以及退火对该复合材料硬度的影响，对微观组织进行了分析。结果表明，制备的该复合材料具有优良的高温力学性能，在350 ℃，σb＝248.6 MPa，σ0.2＝220.95 MPa，δ＝3.16%；在400 ℃，σb＝232.6 MPa，σ0.2＝127.75 MPa， δ＝3.42%。其热稳定性能优良，550 ℃保温200 h，600 ℃保温10 h硬度均没有明显的下降。 类球状细小弥散的Al12(Fe,V)3Si相的生成是该材料具有优异耐热性能的主要原因。SiC颗粒的加入对提高该复合材料高温性能也有重要作用。
英文摘要：The microstructure of SiCP /FVS1212 composite prepared by spray deposited and hot pressing-rolling was studied. The effects of annealing treatment on hardness were investigated. The results show that SiCP / FVS1212 composite has excellent elevated temperature mechanical properties, such as σb, σ0.2 and δ is 248.6 MPa, 220.95 MPa and 3.16% at 350 ℃, and is 232.6 MPa, 127.75 MPa and 3.42% at 400 ℃, respectively. In addition, the composite holds good heat resistant property, the hardness has no evident decline after annealing at 550 ℃ for 200 h or 600 ℃ for 10 h. The good elevated temperature mechanical properties should mainly attribute to the formation of spherical Al12(Fe, V)3Si dispersed phase particulates in aluminum matrix. The additions of SiC particles also play an important role in improving elevated temperature properties.