石墨/Cr_(3)C_(2)增强镍基复合材料的力学性能及摩擦学特性  

Mechanical properties and tribological characteristics of graphite/Cr_(3)C_(2)reinforced nickel-based composites

作　　者：卢朝晖 彭祥阳 钟金童 曹培培 庄晓强 刘青松 侯硕 LU Zhao-hui;PENG Xiang-yang;ZHONG Jin-tong;CAO Pei-pei;ZHUANG Xiao-qiang;LIU Qing-song;HOU Shuo(Equipment Research Center,China Nuclear Power Technology Research Institute Co Ltd,Shenzhen 518000,China)

机构地区：[1]中广核研究院有限公司设备研究所,广东深圳518000

出　　处：《材料热处理学报》2024年第9期55-64,共10页Transactions of Materials and Heat Treatment

基　　金：深圳市科技计划资助(KQTD20200820145821091);国家自然科学基金(U20B2025)。

摘　　要：采用热压烧结工艺制备了不同Cr_(3)C_(2)含量的石墨/Cr_(3)C_(2)共增强镍基复合材料,探究了不同Cr_(3)C_(2)含量的复合材料的微观结构、力学性能和摩擦性能。结果表明:热压烧结制备的镍基复合材料致密无孔隙,Cr_(3)C_(2)和石墨均匀分布于基体内部,异质界面结合良好。随着Cr_(3)C_(2)含量的增加,复合材料的割裂程度增加,硬度增加,但强度降低,断裂机制为脆性断裂。摩擦过程中,石墨具有良好的润滑作用,但Cr_(3)C_(2)造成磨粒磨损,且随着Cr_(3)C_(2)含量的升高,复合材料的摩擦系数和磨损率显著升高。Graphite/Cr_(3)C_(2) co-reinforced nickel-based composites with different Cr_(3)C_(2) contents were prepared using hot pressing sintering technology,and microstructure,mechanical properties and friction properties of the composites with different Cr_(3)C_(2) contents were investigated.The results show that the nickel-based composites prepared by hot pressing sintering is dense and pore free,with Cr_(3)C_(2) and graphite evenly distributed inside the matrix,and good heterojunction interface bonding.With the increase of Cr_(3)C_(2) content,the degree of cutting of the composites increases,the hardness increases,but the strength decreases,and the fracture mechanism is brittle fracture.During the friction,the graphite has a good lubricating effect,but the Cr_(3)C_(2) causes abrasive wear,and with the increase of Cr_(3)C_(2) content,the friction coefficient and wear rate of the composites significantly increase.

关 键 词：镍基复合材料 微观结构 力学性能 摩擦学特性 

分 类 号：TB333[一般工业技术—材料科学与工程]