摘要
综述了放电等离子烧结(SPS)技术在制备纳米/超细晶、大块非晶、准晶、金属间化合物、功能梯度材料、多孔材料、硬质合金等多种金属材料中的应用情况。重点阐述烧结过程中的致密化机理,焦耳热生成机制,关于等离子活化效应的争议,电流、温度、位移量和应力分布的不均匀性及其影响,粉末的预处理工艺及其对性能的影响。并总结了SPS技术现存问题及发展趋势。
The application of spark plasma sintering (SPS) in preparing metal materials is reviewed, including nano/ultrafine-grained materials, bulk amorphous alloys, quasicrystals, intermetallic compounds, functionally graded materials, cellular materials, hard alloy, etc. The mechanism of metal consolidation and generation o{ Joule heat, the dispute of plasma activation, the inhomogeneous distribution of current, temperature, displacement and stress, and the pretreatment of powder are expatiated. The defects and future of SPS technology are also discussed.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2008年第7期60-64,共5页
Materials Reports
基金
国家自然科学基金项目资助(No.50634060)
国家重点基础研究发展计划(No.2007CB209800)
关键词
放电等离子烧结
机理
温度
应力
粉末预处理
spark plasma sintering, mechanism, temperature, stress, pretreatment of powder