金刚石与磨料磨具工程2024，Vol.44Issue(2)：179-184,6.DOI:10.13394/j.cnki.jgszz.2023.0048
Ti3AlC2对PcBN材料显微结构及性能的影响
Effect of Ti3AlC2 content on microstructure and properties of PcBN materials
摘要
Abstract
The monolithic PcBN composite tool materials were prepared at 5.5 GPa and 1 450 ℃ with different con-tents of Ti3AlC2 as the binder phase.The effects of different mass fractions of Ti3AlC2 on the phase composition,micro-structure,and mechanical properties of PcBN tool materials were studied.The results show that Ti3AlC2 can decompose completely to form TiC and Al-Ti alloys under high temperature and high pressure,and reacts with cBN to form AlN,TiB2,and TiC0.7N0.3 phases.TiC,AlN,TiB2,and TiC0.7N0.3 are uniformly distributed around the cBN and tightly bonded to the cBN,thereby improving the mechanical properties of PcBN.When the mass fraction of Ti3AlC2 is 25％,the relat-ive density,bending strength,fracture toughness,and wear ratio of PcBN reach the maximum values,which are 98.9％,592 MPa,6.87 MPa.m1/2 and 7 350,respectively.When the mass fraction of Ti3AlC2 is 20％,the microhardness of PcBN reaches the maximum value of 4 786.7 HV.关键词
聚晶立方氮化硼/Ti3AlC2/结合剂/高温高压/力学性能Key words
PcBN/Ti3AlC2/binder/high temperature and high pressure(HTHP)/mechanical properties分类
化学化工引用本文复制引用
马金明,陈亚超,栗正新,肖长江,陶宏均,张群飞,汤黎辉,曹剑锋,李远,周世杰,唐昱霖..Ti3AlC2对PcBN材料显微结构及性能的影响[J].金刚石与磨料磨具工程,2024,44(2):179-184,6.基金项目
工业和信息化部科技高质量发展项目(203ZS20230005) （203ZS20230005）
河南省重大科技专项(221100230100) （221100230100）
河南省2024年重点研发专项"新能源汽车关键零部件用高端系列超硬磨具研制及产业化" （）
郑州市重大科技专项(2021KJZX0062). （2021KJZX0062）
