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New Insights into the Growth Mechanism of 3D-Printed Al 2O 3-Y 3Al 5O 12 Binary Eutectic Composites

18 Pages Posted: 27 Sep 2019 Publication Status: 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

Bowen Yu

University of Queensland - School of Mechanical and Mining Engineering

Ming-Xing Zhang

University of Queensland - School of Mechanical and Mining Engineering

Han Huang

University of Queensland - School of Mechanical and Mining Engineering

Abstract

We investigated the complex solidification behaviour of Al2O3-Y3Al5O12 eutectics prepared by laser engineered net shaping. Colony structure consisting of coupled irregular eutectic was dominant at interior region of as-fabricated specimens, and its growth behaviour was depicted by Magnin-Kurz model. In each deposited layer, The Y3Al5O12 phase within irregular eutectic grew through a competitive mechanism from random to oriented, whereas the orientation of Al2O3 remained unchanged. Transition from anomalous to colony coupled eutectics occurred at the bottom of each layer, and irregular to regular eutectics transition was recognized at outer region of as-built sample.

Keywords: ceramic eutectic, additive manufacturing, laser engineered net shaping, solidification

Suggested Citation

Fan, Zhiqi and Zhao, Yitian and Tan, Qiyang and Yu, Bowen and Zhang, Ming-Xing and Huang, Han, New Insights into the Growth Mechanism of 3D-Printed Al 2O 3-Y 3Al 5O 12 Binary Eutectic Composites. Available at SSRN: https://ssrn.com/abstract=3458153 or http://dx.doi.org/10.2139/ssrn.3458153

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

Bowen Yu

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 ( email )

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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