摘要
以TiC作为陶瓷结合剂,采用高温高压真空烧结技术研究了TiC含量对PCBN微观组织结构及力学性能的影响。结果表明:在烧结过程中,CBN与结合剂中的TiC、Al发生了反应,生成了新的物相。生成的TiB_2、AlB_(12)、TiN为硬质相,对PCBN烧结体的硬度和耐磨性有一定的提高作用,生成的AlN、AlB_2对其抗冲击性能和导热性有很大帮助。当TiC、Al、Co质量分数分别为10%、10%、5%时,烧结体的致密性和硬度最优。
Taking TiC as ceramic binder, the effects of TiC content on the microstructure and mechanical properties of PCBN were studied by high temperature and high pressure vacuum sintering technology. The results show that new phases are generated by the reation between CBN and TiC and A1 of binders in sintering process. The hardness and wear resistance of PCBN are increased by the new phases TiB_2,AlB_（12） and TiN, which are hard phases. While the new generation of AlN and AlB_2 is helpful for their impact resistance and thermal conductivity. When the mass fraction of TiC, Al and Co is 10%, 10% and 5%, respectively, the density and hardness of the sintered body are optimal.
出处
《热加工工艺》
CSCD
北大核心
2017年第14期54-57,共4页
Hot Working Technology
基金
河南省科技厅科技攻关重点项目(112102210267)
关键词
PCBN
结合剂
TIC
力学性能
polycrystalline cubic boron nitride （PcBN）
binder
TiC
mechanical properties
