Diamond wheel grinding characteristics of 3D orthogonal quartz fiber reinforced silica ceramic matrix composite  

作　　者：Bin LIN Haoji WANG Jinhua WEI Tianyi SUI 

机构地区：[1]Key Laboratory of Advanced Ceramics and Machining Technology,Ministry of Education,Tianjin University,Tianjin 300072,China [2]Aerospace Research Institute of Materials&Processing Technology,Beijing 100076,China

出　　处：《Chinese Journal of Aeronautics》2021年第5期404-414,共11页中国航空学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51375333 and 51805365)。

摘　　要：Fiber-reinforced silica ceramic matrix composites(SiO_(2) f/SiO_(2))have gained extensive attention in recent years for its applications in aeronautics field such as radar radome and window.However,the machining properties and mechanism of the material remain unclear.The features and mechanical properties of the material itself have a significant influence on both its machining characteristics and surface integrity.Thus,a full-factor grinding experiment is conducted using a 3 D orthogonal SiO_(2) f/SiO_(2) aiming to obtain its machining characteristics.The effects of grinding parameters and tools on the grinding force,surface roughness,and material damage type are investigated using a dynamometer,Scanning Electron Microscope(SEM),and Acoustic Emission(AE)analysis.The AE frequency band is analyzed,and a semi-analytical force model is established to study the difference between a single grain and wheel grinding.It was found that the changes in surface roughness correlate with the changes in grinding force,with fiber fracture being the main reason behind the increase in grinding force.Finally,the material removal mechanism was studied based on the AE analysis.It was found that the removal mechanism is fiber fracture dominated with matrix crack and debonding,and the primary sources of energy consumption are fiber fracture and friction.

关 键 词：3D orthogonal SiO_(2)f/SiO_(2) GRINDING Surface roughness AE frequency Removal mechanism 

分 类 号：TB332[一般工业技术—材料科学与工程] V25[航空宇航科学与技术—航空宇航制造工程]