进给速度对MI工艺制备SiCf/SiC复合材料加工损伤的影响  

Effect of Feed Rate on Machining Damage of SiCf/SiC Composites by MI Process

作　　者：姜卓钰 赵春玲 束小文 刘志强 焦健 JIANG Zhuoyu;ZHAO Chunlin;SHU Xiaowen;LIU Zhiqiang;JIAO Jian(National Key Laboratory of Advanced Composites,AECC Beijing Institute of Aeronautical Materials,Beijing 100095;Surface Engineering Division,AECC Beijing Institute of Aeronautical Materials,Beijing 100095;AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002;Army Aviation Representative Office in Beijing,affiliated with the Equipment Department of People′s Liberation Army Ground Force,Beijing 100101;Key Laboratory of Precision and Non-traditional Machining Technology of Ministry of Education,Dalian University of Technology,Dalian 116024)

机构地区：[1]先进复合材料科技重点实验室,中国航发北京航空材料研究院,北京100095 [2]表面工程研究所,中国航发北京航空材料研究院,北京100095 [3]中国航发湖南动力机械研究所,株洲412002 [4]陆军装备部航空军事代表局驻北京地区航空军事代表室,北京100101 [5]精密与特种加工教育部重点实验室,大连理工大学,大连116024

出　　处：《宇航材料工艺》2022年第4期66-70,共5页Aerospace Materials & Technology

摘　　要：采用超声辅助磨削对MI工艺制备的SiC_(f)/SiC复合材料表面进行磨削加工,研究了进给速度对复合材料性能的影响。结果表明:采用超声辅助磨削加工SiC_(f)/SiC复合材料表面时,加工区域出现纤维脱粘、断裂、破碎及基体裂纹和脱落现象,且纤维与基体界面会有裂纹产生。当进给速度提高时,复合材料表面损伤加重,导致其比例极限强度和最大载荷降低。进给速度由400 mm/min提高至1000 mm/min时,SiC_(f)/SiC复合材料的拉伸强度和弯曲强度分别降低4.7%和20.6%。SiC_(f)/SiC composites was processed by ultrasound-assisted grinding,and the effect of feed rate on the machining damage of the composites by MI process was studied.The results show that when the surface of SiC_(f)/SiC composite is processed by ultrasound-assisted grinding,many machining defects will come into being,such as the fiber debonding,fracture,breakage,matrix crack and shedding.And the interface between the fiber and matrix also has cracks.With the increase of feed speed,the surface damage of the composite material is aggravated,which leads to the decrease of proportional ultimate strength and maximum load.When the feed rate increases from 400 mm/min to 1000 mm/min,the tensile strength and bending strength of SiC_(f)/SiC composites reduce by 4.7%and 20.6%,respectively.

关 键 词：SICF /SiC复合材料 超声辅助加工 表面形貌 进给速度 

分 类 号：TB332[一般工业技术—材料科学与工程]