硬度是衡量超硬材料烧结体的主要特性之一。
Hardness is one of the main characters of ultrahard material sinters.
进一步延长或缩短脉冲电流烧结时间，烧结体的密度、硬度和弯曲强度反而下降。
With prolonged or shortened pulse electrical current sintering time, the density, hardness and bend toughness of the sintered materials decreased.
由于金刚石的硬度与弹性模量极高，在烧结时很难发生塑性变形。
Because of the excellent hardness and elastic module of diamond, it is difficult to get plastic deformation when sintering.
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