纳米Cu粉末的放电等离子烧结Rapid Sintering of Nanocrystalline Cu Powders by Spark Plasma Sintering
冉旭,刘勇兵,闫海峰,刘学然,安健
摘要(Abstract)：
利用放电等离子烧结装置考察了纳米铜粉坯体的升温过程,研究了烧结速度和烧结温度对烧结等效电阻、烧结体相对密度及晶粒尺寸的影响。结果表明:在烧结过程中存在着最佳的烧结速度,当烧结速度为15 0℃ min时,样品致密度达到峰值88%左右,晶粒的平均尺寸接近2 0 0nm ,且烧结的等效电阻随升温速度的增加而降低;纳米Cu粉末在2 5 0℃时开始烧结成块,随烧结温度提高,烧结致密度不断提高,电阻降低;但是当升温速度过快,烧结温度过高时,出现反致密化现象。
关键词(KeyWords)： 放电等离子烧结;纳米Cu粉;烧结速度;烧结温度
基金项目(Foundation): 国家教委博士点基金资助项目 (2 0 0 30 1 830 67)
作者(Author): 冉旭,刘勇兵,闫海峰,刘学然,安健
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