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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=248.6MPa,σ0.2=220.95MPa,δ=3.16%;在400℃,σb=232.6MPa,σ0.2=127.75MPa,δ=3.42%。其热稳定性能优良,550℃保温200h,600℃保温10h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。
The microstructure of SiCP / FVS1212 composites by spray deposition-hot press-rolling and the effect of annealing on the hardness of the composites were investigated. The microstructure was analyzed. The results show that the prepared composite has excellent high temperature mechanical properties, σb = 248.6MPa, σ0.2 = 220.95MPa, δ = 3.16% at 350 ℃, σb = 232.6MPa and σ0.2 = 127.75 at 400 ℃ MPa, δ = 3.42%. Its thermal stability is excellent, the insulation at 550 ℃ 200h, 600 ℃ insulation 10h hardness no significant decline. The formation of spheroidal finely dispersed Al12 (Fe, V) 3Si phase is the main reason for the excellent heat resistance of this material. The addition of SiC particles also plays an important role in improving the high temperature performance of the composite.