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微波烧结制备MAX-cBN复合材料及其反应机理研究 被引量:6

Reaction Mechanism of Fabrication of MAX-cBN Composites by Microwave Sintering
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摘要 采用Ti3SiC2与Ti3AlC2粉体和cBN粉体为原料,通过微波烧结制备Ti3SiC2与Ti3AlC2结合剂cBN复合材料,同时研究cBN的含量对该复合材料的物相组成与显微形貌的影响。结果表明,Ti3SiC2-cBN试样烧结后得到了SiC、TiSi2、TiC、TiO、TiO2、SiO2。cBN添加量为10%的复合材料中Ti3SiC2分解较为严重。试样烧结后基体组织比较细小,只有几微米。当原料中cBN含量为20%时,cBN表面会形成凹凸不平的组织。Ti3AlC2-cBN试样烧结后得到了Ti2AlC、TiC、Ti、Al、Al2O3,Ti3AlC2材料分解完全。cBN含量较高时,它可以与Ti3AlC2或其分解产物充分反应,形成相应的氮化物或碳氮化物。 Ti3SiC2 and Ti3AlC2 ceramic boned cBN composites were fabricated by microwave sintering from Ti3 SiC2, Ti3 AlC2 and cBN raw powders. The effect of cBN's content on phase and micro-structure of composites were also studied. The result shows that SiC,TiSi2 ,TiC,TiO,TiO2, SiO2 could be synthesized after microwave sintering of Ti3SiC2-cBN samples. When cBN content was 10%, Ti3SiC2 was decomposed seriously. The phase organization was finer with a size of about several micrometer. When cBN content was 20%, irregularity organization were formed on the surface of Ti2 AlC, TiC, Ti, Al, Al203 could be synthesized after microwave sintering of Ti2 AIC2-cBN samples. Ti3 AlC2 was decomposed totally. When clSN content was higher, it can react with Ti3 AlC2 or its decomposed products fully to form nitride or carbonitride.
出处 《材料导报》 EI CAS CSCD 北大核心 2016年第6期66-69,共4页 Materials Reports
基金 河南省教育厅重点项目(13A430132) 河南省教育厅自然科学研究计划(12A430024 13A430128 14A430007) 河南省基础与前沿技术研究计划(132300410164) 河南省省院科技合作项目(122106000051 142106000193) 河南省科技开放合作项目(142106000051)
关键词 TI3SIC2 TI3ALC2 cBN微波烧结 Ti3 SiC2, Ti3 AlC2, cBN, microwave sintering
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参考文献15

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