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采用3TiC/2Si/0.2Al粉体为原料,通过原位反应烧结技术制备致密的纳米SiC增强Ti3SiC2材料,同时研究不同烧结方式(热压烧结和放电等离子烧结)对反应产物的影响。采用XRD、SEM和EDS对试样的物相组成、微观形貌和微区成分进行分析。结果表明,采用两种烧结技术都可制备致密的SiC增强Ti3SiC2细晶材料;采用热压烧结技术可制备纳米SiC-Ti3SiC2复合材料;采用放电等离子烧结技术得到的复合材料中SiC晶粒略粗,为500 nm。
The 3TiC / 2Si / 0.2Al powders were used as raw materials to prepare compact nano-SiC reinforced Ti3SiC2 by in-situ reactive sintering. The effects of different sintering methods (hot pressing sintering and spark plasma sintering) on the reaction products were studied. XRD, SEM and EDS were used to analyze the phase composition, micro-morphology and micro-zone composition of the sample. The results show that the compact SiC reinforced Ti3SiC2 fine-grained materials can be prepared by both sintering technologies; the nano-SiC-Ti3SiC2 composite can be prepared by hot-pressing sintering technology; the SiC grains in the composite obtained by the spark plasma sintering technology are slightly coarse, Is 500 nm.