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.
Environmental Effect on the Crack Behavior of Yttria-Stabilized Zirconia During Laser Drilling
Manuscript received April 8, 2018; final manuscript received February 24, 2019; published online March 19, 2019. Assoc. Editor: Hongqiang Chen.
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Shen, H., Jiang, J., Feng, D., Xing, C., Zhao, X., and Xiao, P. (March 19, 2019). "Environmental Effect on the Crack Behavior of Yttria-Stabilized Zirconia During Laser Drilling." ASME. J. Manuf. Sci. Eng. May 2019; 141(5): 054501. https://doi.org/10.1115/1.4043022
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