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research-article

Grinding characteristics, material removal and damage formation mechanisms of zirconia ceramics in hybrid laser/grinding (HLG)

[+] Author and Article Information
Sheng Xu

State Key Laboratory of Mechanical System and Vibration, Shanghai, 200240, China; School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
story2011@sjtu.edu.cn

Zhenqiang Yao

State Key Laboratory of Mechanical System and Vibration, Shanghai, 200240, China; School of Mechanical Engineering, Shanghai Jiao Tong University, Minhang District, 200240, Shanghai, China
zqyao@sjtu.edu.cn

Jiawei He

School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
hejiawei@sjtu.edu.cn

Jian Xu

Department of International Defense System, Nanjing Research Institute of Electronic Engineering, Nanjing, China
xujian2001-1@163.com

1Corresponding author.

ASME doi:10.1115/1.4039645 History: Received March 31, 2017; Revised March 04, 2018

Abstract

Zirconia ceramics which is called 'ceramic steel' has gained significant importance because of their excellent properties. It is desired to maintain the surface quality while increasing the economics of ceramics grinding process. A hybrid laser/grinding process was utilized to grind zirconia ceramics which was irradiated with continuous wave laser before machining in the process. The feasibility of hybrid laser/grinding of zirconia ceramics was investigated in terms of grinding force and energy, material removal and damage formation mechanisms. The results show that laser irradiation can induce lateral cracks, which can help material removal and prevent further crack propagating into the specimen. The results of grinding tests indicate that grinding force and energy decrease significantly while the grinding force ratio increase as compared with conventional ceramics grinding. The combination of the fractured area, the ploughing striations and seldom debris on the ground surfaces symbolizes the combined material removal mechanism of both brittle mode and ductile mode.

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