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用放电等离子技术烧结tib2陶瓷

Keywords: sps,tib2陶瓷,晶粒尺寸,相对密度,真空室

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Abstract:

?利用脉冲大电流快速烧结技术(也称放电等离子烧结sps技术)研究了tib2的烧结过程.结果表明:升温速率对烧结样品的相对密度、晶粒尺寸及烧结过程中真空室气压均有重要影响.最佳的升温速率使tib2烧结晶粒相对最小、烧结体相对密度较高.分析认为,在sps条件下的快速升温有利于颗粒表面活化,烧结体晶粒尺寸既受控于烧结时间,也受控于晶粒生长活化能.

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