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Yttria stabilized zirconia (YSZ) thin wall structures fabricated using laser engineered net shaping (LENS)

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Abstract

Yttria stabilized zirconia (YSZ) thin wall components were fabricated using laser engineered net shaping (LENS) technique. It was found that after LENS processing, the monoclinic (m) phase in as-received YSZ powders transformed to tetragonal (t) and cubic (c) phases with the lenticular shaped t-ZrO2 embedded in the c-ZrO2 matrix. The relative density of the parts reached up to 98.7%. Our investigation showed that micro cracks within the wall structure were reduced by judiciously choosing laser power parameter. The fabricated parts have surface roughness values that ranged from 20 to 40 μm. The maximum hardness and elastic modulus achieved from the LENSed YSZ parts were 19.8 GPa and 236.1 GPa, respectively. We also demonstrated that dark brown color of the LENSed parts could be removed via heat treatment.

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Acknowledgements

The authors would like to thank Ms. Ying Yu for her help in Raman spectroscopic analysis, and Mr. Ron Rasch for valuable discussion on microstructural analysis. The authors also want to acknowledge the facility use in the Australian National Fabrication Facility (ANFF) and the Centre for Microscopy and Microanalysis (CMM) at The University of Queensland.

Funding

This project was partially funded by the UQ CIEF grant and Medical Engineering @ UQ SEED grant.

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Authors and Affiliations

  1. School of Mechanical and Mining Engineering, The University of Queensland, St Lucia, QLD, 4072, Australia

    Zhiqi Fan, Yitian Zhao, Mingyuan Lu & Han Huang

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  1. Zhiqi Fan
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  2. Yitian Zhao
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  3. Mingyuan Lu
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  4. Han Huang
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Correspondence to Mingyuan Lu or Han Huang.

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Fan, Z., Zhao, Y., Lu, M. et al. Yttria stabilized zirconia (YSZ) thin wall structures fabricated using laser engineered net shaping (LENS). Int J Adv Manuf Technol 105, 4491–4498 (2019). https://doi.org/10.1007/s00170-019-03322-z

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  • DOI: https://doi.org/10.1007/s00170-019-03322-z

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