In-situ Synthesis VC Particulates to Reinforce Iron Matrix Composite
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摘要: 用SEM、XRD检测VC颗粒增强复合材料的相和组织结构,证实了在较低温度下石墨有促进σ-FeV相分解的作用并分析了其原因。讨论了烧结温度对VC颗粒大小和分布的影响,在850℃固相烧结时,钒的碳化反应能够完成,而且VC颗粒不易长大,原位生成小于0.5μm的超细晶粒。Abstract: The microstructure and the phases in composite were examined by means of SEM and XRD. It was confirmed that graphite had a function to accelerate the decompose of σ-FeV in lower temperature, and the courses were explained. The effects of sintering temperature on the distribution and size of VC were discussed. The carburising reaction of V to form VC take place under solid phase sintering at 850℃, and the in-situ synthesis VC particulate is fine, so the size is smaller than 0.5 μm.
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Key words:
- in-situ synthesis /
- solid phase sintering /
- particulates reinforced /
- composite
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