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 microstructure and properties of PcBN composites

作　　者：邹芹[1,2] 董培航 李艳国 袁振雄 武迪[1] 罗永安[1] ZOU Qin;DONG Peihang;LI Yanguo;YUAN Zhenxiong;WU Di;LUO Yongan(State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,Hebei,China;School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,Hebei,China)

机构地区：[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 [2]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《金刚石与磨料磨具工程》2024年第2期185-192,共8页Diamond & Abrasives Engineering

基　　金：河北省高等学校科学技术研究项目(ZD2021099)。

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10 min的烧结条件下,当V(TiN_(0.3))∶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(0.5~1μm)∶V(2~5μm)∶V(5~10μm)=3∶5∶2时,颗粒之间的堆积密度达到最高,性能也达到最优。Polycrystalline cubic boron nitride composites were prepared under high-temperature and high-pressure conditions.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 microscopy(SEM),and energy dispersive spectroscopy(EDS).The experimental results showed that the PcBN composites performed better under sintering conditions of 5.5 GPa,1400℃,and a 10-minute holding time,achieving a hardness of up to 22.7 GPa and an abrasion ratio of 149.2 at V(TiN_(0.3))∶V(AlN)=70∶30.Moreover,when the particle size combination 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 

分 类 号：TB333[一般工业技术—材料科学与工程] TG58[金属学及工艺—金属切削加工及机床]