纯PcBN陶瓷材料烧结工艺对内部孔隙的影响Effect of Sintering Process on Porosity of Pure PcBN Ceramic Material
席沛尧,姜士鸿,张鹏,邓福铭
摘要(Abstract)：
纯PcBN是新型金属切削刀具材料。通过煮沸称重法得到了高温高压烧结的纯PcBN陶瓷的显孔隙率,使用imageJ2x软件计算纯PcBN陶瓷的分型维数。结果表明,在1700℃、5.8 GPa下,使用15～25μm粒度的cBN粉末烧结得到的纯PcBN孔隙最少;温度降低、压力降低以及降低原料粒度均会导致纯PcBN孔隙增加。在未发生cBN相变的情况下,材料孔隙率的直接因素为原料粒度、塑性变形量和微粉破裂量。
关键词(KeyWords)： 纯PcBN;塑性变形;显孔隙率;体积密度;分形维数
基金项目(Foundation): 高等学校博士学科点专项科研基金(20120023110016)
作者(Author): 席沛尧,姜士鸿,张鹏,邓福铭
DOI: 10.16521/j.cnki.issn.1001-9642.2020.05.007
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