摘要
实验采用粒度为W10的cBN微粉,利用六面顶压机进行高压烧结,烧结温度、压力、烧结时间分别为1550℃、5.6 Gpa、180 s。利用SEM、EDS、XRD、TEM对样品进行微观形貌、元素分布、物相组成分析,研究其微观组织结构及形成机制。结果表明,cBN与Al、Ti发生放热反应,其反应产物Al N在高温条件下转变为液相,使逆转化的h BN晶粒溶解,并发生cBN晶粒析出、长大过程,形成cBN-cBN直接键合;cBN与硬质合金界面存在2~3μm的特殊熔体合金过渡区,其主要成分为Co和Al Ti合金。
The cBN powder with a particle size of W10 was sintered on a hinge cubic press with a sintering pressure of 5. 6 GPa,a sintering temperature of 1550 ℃,and a sintering time of 180 s. SEM,EDS,XRD and TEM were used to analyze the micro-morphology, element distribution and phase composition of the samples,and the microstructure and interface bonding mechanism of the sample were explored. The results show that the exothermic reaction of cBN with Al and Ti resulted in the reaction product Al N transforming into a liquid phase under high temperature conditions,which dissolved the reversely transformed h BN grains and resulted in the precipitation and growth of cBN grains,forming cBN-cBN bonding,cBN and cemented carbide interface existed 2-3 μm special melt alloy transition zone,the main components of the interface were Co and Al Ti alloys.
作者
邓福铭
张鹏
邓雯丽
徐智豪
贺雪花
刘瑞平
DENG Fu-ming;ZHANG Peng;DENG Wen-li;XU Zhi-hao;HE Xue-hua;LIU Rui-ping(Institute of Super-hard Cutting Tool Materials,China University of Mining and Technology（Beijing）,Beijing 100083,China;Research Center of High Pressure Materials,China University of Mining and Technology（Beijing）,Beijing 100083,China;Dongguan Shuanghua Electech Co.LTD,Dongguan 523800,China)
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2018年第6期1152-1156,1162,共6页
Journal of Synthetic Crystals
基金
高等学校博士学科点专项科研基金(20120023110016)
中央高校基本科研基金(2010YJ13)
中关村能源产业研究院与东莞双华电子科技有限公司共建项目<超硬刀具材料及数控刀具制造技术>(2016002)
关键词
立方氮化硼
微观形貌
界面
物相组成
cubic boron nitride
microscopic morphology
interface
phase composition
