压力对PCBN复合材料烧结性质的影响及烧结机理研究  

Effects of Pressure on the Sintering Properties of PCBN Composite and Sintering Mechanism

作　　者：李勇[1] 徐会文 张杰[1] 金慧[1] 邓韬[1] 贾晓鹏[3] LI Yong XU Hui-Wen ZHANG Jie JIN Hui DENG Tao JIA Xiao-Pengs(College of Physics and Electronic Engineering, Tongren University, Tongren 554300, China Taiyuan Railway Transportation Equipment Co. ,Ltd. , Taiyuan 030001 ,China State Key Laboratory of Superhard Materials ,Jilin University ,Changchun 130012 ,China)

机构地区：[1]铜仁学院物理与电子工程学院,贵州铜仁554300 [2]太原重工轨道交通设备有限公司,山西太原030001 [3]吉林大学超硬材料国家重点实验室,吉林长春130012

出　　处：《高压物理学报》2016年第5期363-368,共6页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(51172089);贵州省教育厅自然科学基金重点项目(KY[2013]183);贵州省科技厅联合基金(LH[2015]7232);铜仁学院博士科研项目(DS1302);中国博士后科学基金(2016M592714)

摘　　要：在高温高压条件下,通过硬质合金基体的高压原位熔渗法,研究了合成压力对聚晶立方氮化硼(PCBN)复合材料致密度、颗粒形貌及耐磨性的影响。测试结果显示:随着合成压力的提高,PCBN复合材料的致密度和耐磨性均有一定程度的提升。利用扫描电子显微镜和能谱仪对碳化钨合金基体与立方氮化硼的结合界面进行了测试分析。测试结果表明:在高温高压条件下,立方氮化硼聚晶层与碳化钨硬质合金层中的元素彼此扩散、渗透,形成金属过渡层,将二者牢固地结合在一起。The effects of pressure on the density,particles morphology and abrasion resistance of polycrystalline cubic boron nitride （PCBN） composite were investigated in detail using the melt infiltration method with cemented carbide under high pressure and high temperature conditions. The measured results show that the density and the abrasion resistance of the PCBN composite are enhanced along with the increase of the synthesis pressure. Furthermore,the interface between WC and cBN was characterized using scanning electron microscope （SEM） and energy dispersive spectrometer （EDS）. The results indicate that the elements of WC and cBN interpenetrate each other and generate a transition layer which enables the polycrystalline cBN to bond firmly to the WC substrate.

关 键 词：高压 聚晶立方氮化硼 烧结机理 致密度 

分 类 号：O521.2[理学—高压高温物理] O521.3[理学—物理]