Title: Experimental investigation on the surface integrity in machining for Si₃N₄ engineering ceramics

Authors: Juntao Jing; Hong Zhao; Yunfeng Liu; Xiaoshuang Rao

Addresses: College of Mechanical and Electronic Engineering, Harbin Engineering University, 145 NanTong Road, 154001, China ' College of Mechanical and Electronic Engineering, Harbin Engineering University, 145 NanTong Road, 154001, China ' College of Mechanical and Electronic Engineering, Harbin Engineering University, 145 NanTong Road, 154001, China ' College of Mechanical and Electronic Engineering, Harbin Engineering University, 145 NanTong Road, 154001, China

Abstract: Conventional grinding and rotary ultrasonic grinding machining (RUGM) are applied in precision machining for Si₃N₄ engineering ceramics mostly. The surface integrity is of great difference with different processing operation. In the paper, the differences of surface integrity by the two machining methods were investigated. The comprehensive evaluation for surface integrity parameters of surface microstructure flaws and mechanical properties was investigated. The surface roughness, surface edge-chipping and surface residual stresses were observed and detected. The experiments results were analysed and discussed based on the material removal process, the motion trail of diamond grits, cutting force and tool wear for the different machining methods. The results show that the surface roughness and the residual stress for RUGM are worse than that for conventional grinding, since the effect of indentation fracture is more notable. However, the scope of edge-chipping is smaller for RUGM than that for conventional grinding due to lower cutting force.

Keywords: conventional grinding; rotary ultrasonic grinding machining; RUGM; Si3N4; silicon nitride; engineering ceramics; surface integrity; precision machining; microstructure flaws; mechanical properties; surface roughness; surface edge chipping; surface residual stress; surface quality; material removal rate; MRR; motion trail; diamond grits; cutting force; tool wear.

DOI: 10.1504/IJNM.2013.052889

International Journal of Nanomanufacturing, 2013 Vol.9 No.1, pp.108 - 118

Received: 25 Sep 2012
Accepted: 22 Nov 2012
Published online: 31 Mar 2014 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article