石墨/Cr3C2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/Cr3C2 reinforced nickel-based composites
卢朝晖 1彭祥阳 1钟金童 1曹培培 1庄晓强 1刘青松 1侯硕1
作者信息
- 1. 中广核研究院有限公司设备研究所,广东深圳 518000
- 折叠
摘要
采用热压烧结工艺制备了不同Cr3C2含量的石墨/Cr3C2共增强镍基复合材料,探究了不同Cr3C2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,Cr3C2和石墨均匀分布于基体内部,异质界面结合良好.随着Cr3C2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Cr3C2造成磨粒磨损,且随着Cr3C2含量的升高,复合材料的摩擦系数和磨损率显著升高.
Abstract
Graphite/Cr3C2 co-reinforced nickel-based composites with different Cr3C2 contents were prepared using hot pressing sintering technology,and microstructure,mechanical properties and friction properties of the composites with different Cr3C2 contents were investigated.The results show that the nickel-based composites prepared by hot pressing sintering is dense and pore free,with Cr3C2 and graphite evenly distributed inside the matrix,and good heterojunction interface bonding.With the increase of Cr3C2 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 Cr3C2 causes abrasive wear,and with the increase of Cr3C2 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Key words
nickel-based composites/microstructure/mechanical property/tribological characteristics引用本文复制引用
基金项目
深圳市科技计划(KQTD20200820145821091)
国家自然科学基金(U20B2025)
出版年
2024
NETL
NSTL
万方数据