不同烧结方式对氮化硅陶瓷球综合性能的影响  

Effects of Different Sintering Methods on Comprehensive Properties of Si3N4 Ceramic Balls

作　　者：李红涛 王昆平 于琦[2,3,4] 李夏 徐梅[2,3,4] LI Hongtao;WANG Kunping;YU Qi;LI Xia;XU Mei(2nd Military Representative Office,Luoyang Area,Air Force Equipment Department,Luoyang 471099,China;Luoyang Bearing Research Institute Co.,Ltd.,Luoyang 471039,China;Henan Key Laboratory of High Performance Bearing Technology,Luoyang 471039,China;China International Science and Technology Cooperation Base for Digitization Design of High Performance Bearings,Luoyang 471039,China)

机构地区：[1]空军装备部驻洛阳地区第二军事代表室,河南洛阳471099 [2]洛阳轴承研究所有限公司,河南洛阳471039 [3]河南省高性能轴承技术重点实验室,河南洛阳471039 [4]高性能轴承数字化设计国家国际科技合作基地,河南洛阳471039

出　　处：《轴承》2020年第12期22-24,共3页Bearing

摘　　要：分别采用气氛压力烧结(GPS)和热等静压烧结(HIPS)制备氮化硅陶瓷球,研究烧结方式对氮化硅陶瓷球性能、孔隙度和显微结构的影响。结果表明:热等静压烧结与气氛压力烧结相比,密度、硬度、断裂韧性等性能平均数值差别不明显,压碎载荷比明显提高;HIPS陶瓷球性能的离散度和截面孔隙度明显小于GPS陶瓷球,均匀性明显优于GPS陶瓷球。原因为热等静压能够促进烧结致密化,获得更均匀的柱状β-Si 3N 4晶粒,提高组织的均匀性。The Si 3N 4 ceramic balls are prepared by gas pressure sintering(GPS)and hot isostatic pressing sintering(HIPS)respectively.The effects of sintering methods on properties,porosity and microstructure of Si 3N 4 ceramic balls are studied.The results show that comparing hot isostatic pressing sintering with gas pressure sintering,the average values of density,hardness,fracture toughness and other properties are not significantly changed,and the crushing load ratio is significantly increased.The dispersion and porosity of HIPS ceramic balls are significantly lower than GPS ceramic balls,and the uniformity is significantly better than GPS ceramic balls.The reason is that the hot isostatic pressure promotes sintering densification,obtains more uniform columnarβ-Si 3N 4 grains and improves uniformity of microstructure.

关 键 词：滚动轴承 陶瓷球 氮化硅 气氛压力烧结 热等静压烧结 材料性能 

分 类 号：TH133.331[机械工程—机械制造及自动化] TB321[一般工业技术—材料科学与工程]