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高体积分数的 SiCp/Al复合材料的 SPS致密化机理研究

杨梅君, 张东明, 张联盟, 顾晓峰
  

  1. 武汉理工大学材料复合新技术国家重点实验室, 武汉 430070
  • 收稿日期:2006-07-28 修回日期:2006-11-06 出版日期:2007-07-20 网络出版日期:2007-07-20

Consolidating Mechanism of High Volume Fraction of SiCp/Al Composites by SPS

YANG Mei-Jun, ZHANG Dong-Ming, ZHANG Lian-Meng, GU Xiao-Feng
  

  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

  • Received:2006-07-28 Revised:2006-11-06 Published:2007-07-20 Online:2007-07-20

摘要: 运用放电等离子烧结(SPS)技术制备出体积分数达60%, 致密度达99%的SiCp/Al复合材料. 从烧结工艺的控制及电场的影响两方面对SPS烧结SiCp/Al复合材料的机理进行了研究, 认为SPS烧结SiCp/Al复合材料的致密化过程主要依靠烧结温度、压力及升温速率的合理搭配, 使Al熔融粘结SiC颗粒, 而又不溢出模具; 烧结过程中未发现明显的放电现象, 可能由于电场太弱不足以引发放电.

关键词: 放电等离子烧结, SiC p/Al复合材料, 烧结工艺, 电场

Abstract: 60vol%SiCp/Al composites with high relative density of 99% were fabricated by spark plasma sintering (SPS). The consolidating mechanism of SiCp/Al composites by SPS was analyzed on two aspects: (1) the adjustment of sintering parameters; (2) the effect of electric field. The results indicate that the consolidating procedure of SiCp/Al composites
by SPS is mainly dependent on the proper adjustment of temperature, pressure and heating-rate which make Al melt and adhere SiC particles without spraying out of the graphite dies; no obvious spark appears during the sintering, which may result from the weak electric field.

Key words: SPS, SiC p/Al composites, sintering parameter, electric field

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