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新型MAX相陶瓷Mo2Ga2C的放电等离子烧结
Spark Plasma Sintering of Nove MAX Phase Mo2Ga2C
  
DOI:
中文关键词:  Mo2Ga2C  放电等离子烧结  MAX相陶瓷
英文关键词:Mo2Ga2C  Spark plasma sintering  MAX phase
基金项目:国家自然科学基金(52072113); 河南省自然科学基金(232300421135); 河南省高校基本科研业务费专项资金(NSFRF200101)。
作者单位
张光磊,杜亚琼,胡美华,胡前库,周爱国 河南理工大学 材料科学与工程学院河南 焦作 454003 
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中文摘要:
      Mo2Ga2C是一种新型MAX相,该材料粉体已经可以被稳定的制备。但是Mo2Ga2C粉体不容易被烧结为致密的块体。本文采用放电等离子烧结技术(SPS)高温处理Mo2Ga2C粉体,通过对制备样品的物相组成和微观结构的表征,研究Mo2Ga2C的烧结性能。SPS烧结Mo2Ga2C 的最佳工艺参数为:烧结温度700℃,保温时间20min,轴向压力30MPa。在此条件下SPS烧结Mo2Ga2C样品相对密度达到71.81%。延长保温时间比升高烧结温度对Mo2Ga2C的致密化有更明显的助益;而增大轴向压力对样品的致密化产生负影响。相对于热压烧结,SPS可以在较低的温度快速制备Mo2Ga2C样品,但是制备的样品的致密度较低。
英文摘要:
      Mo2Ga2C is a novel MAX phase. The powders of Mo2Ga2C can be synthesized by established technology. However, the powders are difficult to be sintered to obtain dense bulk samples. In this paper, the Mo2Ga2C powders were sintered by spark plasma sintering (SPS) technology. The compositions and microstructures of sintered samples were characterized to explore the impacts of sintering parameters. The suitable parameters to sintering Mo2Ga2C by SPS was at the temperature of 700 °C for 20 min with the axial pressure of 30 MPa. The obtained samples had the relative density of 71.81%. Longer holding time was more beneficial to the densification of Mo2Ga2C than higher sintering temperature. Higher axial pressure had a negative effect on the densification of samples. Compared with hot pressing, SPS can make bulk samples of Mo2Ga2C at lower temperature and short time. However, the obtained samples had lower relative density.
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