Environmental Effect on the Crack Behavior of Yttria-Stabilized Zirconia During Laser Drilling

Author:

Shen Hong12,Jiang Juan3,Feng Decai12,Xing Chen3,Zhao Xiaofeng3,Xiao Ping4

Affiliation:

1. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;

2. State Key Laboratory of Mechanical System and Vibration, Shanghai 200240, China e-mail:

3. School of Material Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China e-mail:

4. School of Materials, Manchester University, Manchester M13 9PL, UK e-mail:

Abstract

The crack behaviors of yttrium-stabilized zirconia during laser drilling in air, vacuum, and water environments were investigated. Due to the high stress and low fracture toughness induced by tetragonal-monoclinic phase transformation, tremendous cracks occur during drilling in air. Contrastly, cracks were reduced in vacuum drilling since the phase transformation was suppressed due to the generation of oxygen vacancies. By protection of water, no cracks were observed due to low stress and maintained fracture toughness. The crack mechanisms in different drilling media were discussed.

Publisher

ASME International

Subject

Industrial and Manufacturing Engineering,Computer Science Applications,Mechanical Engineering,Control and Systems Engineering

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