【摘要】 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ＴｉＢ_２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ＴｉＢ_２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．更多还原

【Abstract】 Heating rate has important effect on relative density and grain size of ceramic fabricated by pulse electric current sintering or spark plasma sintering and pressure in vacuum room in sintering. It is found that there exist best heating rate which makes the grain size smallest and relative density higher, fast heating is favorable for powder activity, which reduce the active energy when grains growth, grain size is determined not only by heating time but also by active energy.更多还原