摘要
采用热压烧结方法在温度1380℃、保温60min、烧结压力30 MPa条件下制备了立方氮化硼(CBN)颗粒体积分数为30%的WC-10Co超细硬质合金复合材料,用化学气相沉积法对立方氮化硼进行了表面镀金属钛膜预处理。对复合材料的组织结构、密度、抗弯强度等性能进行了研究。结果表明:得到的烧结体的相对密度可达到94.2%,弥散立方氮化硼颗粒与超细硬质合金基体之间没有明显的间隙,CBN-WC-10Co复合材料的抗弯强度为750 MPa,WC的平均晶粒尺寸为400 nm;得到了组织结构均匀、力学性能优良的CBN-WG-10Co复合材料。
WC-10Co nanocomposite powders were produced by continuous spray pyrolysis ＆ carbonization technology and Ti-coated cubic boron nitride（CBN） was prepared by using chemical vapor deposition. Hot-pressing sintering technology was used to prepare CBN-WC-10Co composites at 1 380 ℃ under 30 MPa for 60 minutes. The microstructure, density, transverse rupture strength （TRS）, and bonding conditions between CBN and ultrafine WC-10Co matrix were studied. The average grain size of WC grains is 400 nm, TRS of CBN-WC-10Co composites is more than 750 MPa and the relative density is 94. 2%. CBN-WC-10Co composites with homogeneous microstructure and good mechanical properties are obtained.
出处
《机械工程材料》
CAS
CSCD
北大核心
2007年第4期71-73,共3页
Materials For Mechanical Engineering
基金
武汉市攻关项目(20041003068-04)
教育部科学技术重点研究项目(105123)
