Microstructure and mechanical properties of Ti3(Al,Ga)C2/Al2O3 composites prepared by in situ reactive hot pressing

Yuan FANG; Xiaohua LIU; Yuxia FENG; Jianfeng ZHU; Wei JIANG

doi:10.1007/s40145-020-0428-z

Journal of Advanced Ceramics 2020, 9(6): 782-790 https://doi.org/10.1007/s40145-020-0428-z

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Open Access | Issue | Published: 13 November 2020

Microstructure and mechanical properties of Ti₃(Al,Ga)C₂/Al₂O₃ composites prepared by in situ reactive hot pressing

Show Author's Information Hide Author's Information Yuan FANG, Xiaohua LIU, Yuxia FENG, Jianfeng ZHU(

), Wei JIANG

School of Material Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi’an 710021, China

Keywords:

microstructure, mechanical properties, Ti₃AlC₂, solid solution, ceramic composites

Cite this article:

FANG Y, LIU X, FENG Y, et al. Microstructure and mechanical properties of Ti₃(Al,Ga)C₂/Al₂O₃ composites prepared by in situ reactive hot pressing. Journal of Advanced Ceramics, 2020, 9(6): 782-790. https://doi.org/10.1007/s40145-020-0428-z

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Abstract Full text About this article

Abstract

In this study, Ti₃(Al,Ga)C₂/Al₂O₃ composites were successfully synthesized by in situ hot pressing at 1350 ℃ for 2 h using Ti, Al, TiC, and Ga₂O₃ as raw materials. X-ray diffraction and scanning electron microscopy were used for characterizing the phase identities and microstructures of the sintered composites. The dependence of the Vickers hardness and flexural strength on the Al₂O₃ content was found to be in single-peak type. Ti₃(Al_0.6,Ga_0.4)C₂/10.3vol%Al₂O₃ composite exhibited significantly improved mechanical properties. Vickers hardness and flexural strength of the composite reached 6.58 GPa and 527.11 MPa, which were 40% and 74% higher than those of Ti₃AlC₂, respectively. Formation of solid solution and incorporation of second phase of Al₂O₃ resulted in the opposite influence on the fracture toughness. Finally, the hardening and strengthening mechanisms were discussed in detail.

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Microstructure and mechanical properties of Ti₃(Al,Ga)C₂/Al₂O₃ composites prepared by in situ reactive hot pressing

Show Author's information Hide Author's Information Yuan FANG, Xiaohua LIU, Yuxia FENG, Jianfeng ZHU(

), Wei JIANG

Abstract

Keywords: microstructure, mechanical properties, Ti₃AlC₂, solid solution, ceramic composites

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Acknowledgements

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Publication history

Received: 22 July 2020

Revised: 15 September 2020

Accepted: 26 September 2020

Published: 13 November 2020

Issue date: December 2020

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (51705300), the China Postdoctoral Science Foundation (2018M643559), the Natural Science Foundation of Shaanxi Province (2019JQ-775), Natural Science Foundation of Shaanxi Provincial Department of Education (19JK0152), and the Scientific Research Fund of Shaanxi University of Science & Technology (2017BJ-05).

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