Journal Published Online: 27 October 2017
Volume 6, Issue 1

Hole Surface Formation Mechanism of Al O Ceramic Based on Sintering Diamond Bits

CODEN: MPCACD

Abstract

This paper studied surface formation mechanism of alumina (Al2O3) ceramic holes using sintering diamond bits. First, critical cutting loads and average cutting loads of single abrasive particles were calculated through theoretical analysis; secondly, scanning electron microscope (SEM) examination was carried out to further study the hole surface removal mechanism. The results show the following: (1) theoretical analysis shows that the minimum value of an average load of single abrasive particles is much bigger than the critical cutting load of engendering transverse crackle and that Al2O3 ceramic is removed mainly by the form of brittle fracture; (2) SEM analysis reveals that the machined surface is formed by concave pits (caused by brittle fracture) and groove scratches (caused by plastic deformation), and characters of brittle fracture are dominant; (3) brittle fracture mainly includes cleavage fracture, transgranular fracture, intergranular fracture, spalling removal, etc.; (4) the grinding surface also has a damage zone with different characteristics, such as stomatal zones, loose zones, remnant crackles, etc.

Author Information

Gao, Chao
Department of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
Wang, Sheng
Department of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
Wang, Hui
Department of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
Pages: 16
Price: $25.00
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Details
Stock #: MPC20170024
ISSN: 2379-1365
DOI: 10.1520/MPC20170024