结合剂比例和cBN粒度配比对PcBN复合材料微观结构和性能的影响
Effects of the ratio of binder and the ratio of cBN particle size on the microstruc-ture and properties of PcBN composites
邹芹 1董培航 2李艳国 3袁振雄 2武迪 3罗永安3
作者信息
- 1. 燕山大学,亚稳材料制备技术与科学国家重点实验室,河北秦皇岛 066004;燕山大学机械工程学院,河北秦皇岛 066004
- 2. 燕山大学机械工程学院,河北秦皇岛 066004
- 3. 燕山大学,亚稳材料制备技术与科学国家重点实验室,河北秦皇岛 066004
- 折叠
摘要
在高温高压条件下制备了聚晶立方氮化硼(PcBN)复合材料.采用X射线衍射(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)等研究了结合剂配比和立方氮化硼(cBN)粒度对PcBN复合材料的成分、微观结构、显微硬度和磨耗比的影响.实验结果表明:在压力5.5 GPa,温度1400 ℃,保温10min的烧结条件下,当V(TiN0.3)∶V(AlN)=70∶30时,PcBN复合材料性能较为优异,硬度最高达到22.7 GPa,磨耗比达到149.2;当PcBN复合材料中cBN粒度组合为V(0.5～1 μm)∶V(2～5 μm)∶V(5～10 μm)=3∶5∶2时,颗粒之间的堆积密度达到最高,性能也达到最优.
Abstract
Polycrystalline cubic boron nitride composites were prepared under high-temperature and high-pressure con-ditions.The effects of bonding agent ratio and cBN particle size on the composition,microstructure,microhardness,and abrasive ratios of the PcBN composites were investigated using X-ray diffraction(XRD),field scanning electron micro-scopy(SEM),and energy dispersive spectroscopy(EDS).The experimental results showed that the PcBN composites performed better under sintering conditions of 5.5 GPa,1 400 ℃,and a 10-minute holding time,achieving a hardness of up to 22.7 GPa and an abrasion ratio of 149.2 at V(TiN0.3)∶V(AlN)=70∶30.Moreover,when the particle size combina-tion of cBN in PcBN composites is(0.5～1)μm∶(2～5)μm∶(5～10)μm=3∶5∶2,the packing density between particles reaches its peak,resulting in optimal performance.
关键词
PcBN复合材料/高温高压/结合剂/粒度Key words
PcBN composite/high pressure and high temperature(HPHT)/binder/particle size引用本文复制引用
基金项目
河北省高等学校科学技术研究项目(ZD2021099)
出版年
2024
国家科技期刊平台
NSTL
万方数据