金刚石与磨料磨具工程2024，Vol.44Issue(3)：327-334,8.DOI:10.13394/j.cnki.jgszz.2023.0104
基于单颗金刚石划擦的单向Cf/SiC复合材料去除机理
Removal mechanism of unidirectional Cf/SiC composites based on single diamond grit scratching
摘要
Abstract
To investigate the scratch removal mechanism of unidirectional Cf/SiC composite materials,quasi-static scratching tests were carried out using a single diamond abrasive grain to analyze the changes in acoustic emission sig-nals of the scratched materials under different indentation loads.These tests were complemented by SEM images to ana-lyze the removal behavior and scratch removal mechanism of the materials.The test results show that the acoustic emis-sion signal value increases with the increase in indentation load.Under the same parameters,the signal value in the SB direction is larger,and the signal fluctuation is more severe.Combining the acoustic emission signal and SEM morpho-logy analysis,it is concluded that the scratch removal behavior of the material varies in different directions.The materi-al primarily undergoes brittle removal.In the SA direction,fibers mainly experience tensile fracture and fiber pull-out,whereas in the SB direction,the main fracture modes of the fiber are bending fracture and shear fracture.According to the SEM morphology analysis,the formation process of the removal behavior and the material scratch removal mechan-ism are described.关键词
单向Cf/SiC复合材料/单颗磨粒划擦试验/声发射信号/材料去除机理Key words
unidirectional Cf/SiC composites/single diamond grit scratching/acoustic emission signal/material re-moval mechanism分类
矿业与冶金引用本文复制引用
温家宙,王庆霞,余爱武,吴重军..基于单颗金刚石划擦的单向Cf/SiC复合材料去除机理[J].金刚石与磨料磨具工程,2024,44(3):327-334,8.基金项目
国家自然科学基金(52005098) （52005098）
上海市自然科学基金(22ZR1402400) （22ZR1402400）
上海航天科技创新基金(SAST2022-059) （SAST2022-059）
中国博士后基金(2022M721910). （2022M721910）
