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Nanostructured Al 2O 3-YAG-ZrO 2 Ternary Eutectic Components Prepared by Laser Engineered Net Shaping

56 Pages Posted: 14 Dec 2018 First Look: Accepted

See all articles by Zhiqi Fan

Zhiqi Fan

University of Queensland - School of Mechanical and Mining Engineering

Yitian Zhao

University of Queensland - School of Mechanical and Mining Engineering

Qiyang Tan

University of Queensland - School of Mechanical and Mining Engineering

Ning Mo

University of Queensland - School of Mechanical and Mining Engineering

Ming-Xing Zhang

University of Queensland - School of Mechanical and Mining Engineering

Mingyuan Lu

University of Queensland - School of Mechanical and Mining Engineering

Han Huang

University of Queensland - School of Mechanical and Mining Engineering

Abstract

The present work proposed a novel 3D printing approach for fabricating ternary eutectic ceramics (Al2O3-YAG-ZrO2, or AYZ in short) using laser engineered net shaping (LENS) technique. Highly dense (≥ 98%) thin wall components with refined eutectic microstructures were successfully fabricated. The as-fabricated ceramic eutectics mainly consist of cellular eutectics with three phases interpenetrated. In each deposited layer, the solidified microstructure changes from planar to cellular along building direction. The evolution of characteristic dimension of microstructure can be well interpreted using Jackson-Hunt relationship. Irregular interpenetrating to regular fibrous eutectic structure transition occurs at boundary region of LENSed specimens, primarily due to much higher solidification rate. The texture of <0001>Al2O3 // <001>YAG // <001>ZrO2 is recognized at the interior region of LENSed eutectic part along building direction, but gradually tilts from central to edge due to change of cellular growth direction. The LENSed AYZ samples exhibit almost isotropic property, and have mechanical performances comparable to those fabricated using conventional direction solidification methods.

Keywords: Laser engineered net shaping, Ceramics, Eutectic solidification, Microstructure, Mechanical properties

Suggested Citation

Fan, Zhiqi and Zhao, Yitian and Tan, Qiyang and Mo, Ning and Zhang, Ming-Xing and Lu, Mingyuan and Huang, Han, Nanostructured Al 2O 3-YAG-ZrO 2 Ternary Eutectic Components Prepared by Laser Engineered Net Shaping (December 14, 2018). Available at SSRN: https://ssrn.com/abstract=3301203

Zhiqi Fan

University of Queensland - School of Mechanical and Mining Engineering ( email )

St Lucia
Brisbane, Queensland 4072
Australia

Yitian Zhao

University of Queensland - School of Mechanical and Mining Engineering

St Lucia
Brisbane, Queensland 4072
Australia

Qiyang Tan

University of Queensland - School of Mechanical and Mining Engineering

St Lucia
Brisbane, Queensland 4072
Australia

Ning Mo

University of Queensland - School of Mechanical and Mining Engineering

St Lucia
Brisbane, Queensland 4072
Australia

Ming-Xing Zhang

University of Queensland - School of Mechanical and Mining Engineering

St Lucia
Brisbane, Queensland 4072
Australia

Mingyuan Lu

University of Queensland - School of Mechanical and Mining Engineering

St Lucia
Brisbane, Queensland 4072
Australia

Han Huang (Contact Author)

University of Queensland - School of Mechanical and Mining Engineering ( email )

St Lucia
Brisbane, Queensland 4072
Australia

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