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Journal of Advanced Ceramics 2023, 12(1): 93-110 https://doi.org/10.26599/JAC.2023.9220669
Research Article | Open Access | Issue | Published: 23 December 2022

Formation mechanisms of Ti3(Si,Al)C2/Al2O3 composites from Ti3AlC2 and SiO via low-temperature sintering

Show Author's Information Zhenyu ZHANGa,†,  Jun JIb,  Yingying CHENb,  Deli MAa,  Sique CHENb,  Hailing YANGa,  Guopu SHIb,  Zhi WANGb,  Mengyong SUNc,  Fei CHENd,  Shifeng HUANGa,  Qinggang LIa,†( )
Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China
School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
52 Institute of China North Industries Group, Yantai 264003, China
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

† Zhenyu Zhang and Qinggang Li contributed equally to this work.

Keywords:
aluminum oxide (Al2O3), current-assisted sintering (CAS), silicon monoxide (SiO), Ti3(Si,Al)C2
Cite this article:
ZHANG Z, JI J, CHEN Y, et al. Formation mechanisms of Ti3(Si,Al)C2/Al2O3 composites from Ti3AlC2 and SiO via low-temperature sintering. Journal of Advanced Ceramics, 2023, 12(1): 93-110. https://doi.org/10.26599/JAC.2023.9220669
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Abstract Full text Electronic supplementary material About this article

Ti3SiC2/Al2O3 composites have attracted attention due to their excellent mechanical and electromagnetic properties, but the high temperatures (≥ 1400 ℃) required for the densification of aluminum oxide (Al2O3) leads to the decomposition of Ti3SiC2. To address this issue, Ti3(SixAl1−x)C2/Al2O3 (x represents the Si content) composites were synthesized for the first time via hot-pressing (HP) sintering and current-assisted sintering (CAS) of mixed Ti3AlC2 and silicon monoxide (SiO) powders at 1300 and 1200 ℃, respectively. Both approaches produced composites with x values greater than 0.9, indicating that the compositions of the prepared composites were similar to those of Ti3SiC2/Al2O3 composites. The synthetic mechanism involved substitution and continuous interdiffusion of Al and Si atoms. The composite prepared by CAS at 1200 ℃ was compacted, whereas the composite prepared by HP had a low density. The low-temperature densification mechanism is attributed to the combined effects of amorphous SiO, liquid Al, and the high heating rates for CAS. The flexural strength and hardness of the composite prepared by CAS were also comparable to those of compacted Ti3SiC2/Al2O3 composites.


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About this article

Formation mechanisms of Ti3(Si,Al)C2/Al2O3 composites from Ti3AlC2 and SiO via low-temperature sintering

Show Author's information Zhenyu ZHANGa,†, Jun JIb, Yingying CHENb, Deli MAa, Sique CHENb, Hailing YANGa, Guopu SHIb, Zhi WANGb, Mengyong SUNc, Fei CHENd, Shifeng HUANGa, Qinggang LIa,†( )
Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China
School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
52 Institute of China North Industries Group, Yantai 264003, China
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

† Zhenyu Zhang and Qinggang Li contributed equally to this work.

Abstract

Ti3SiC2/Al2O3 composites have attracted attention due to their excellent mechanical and electromagnetic properties, but the high temperatures (≥ 1400 ℃) required for the densification of aluminum oxide (Al2O3) leads to the decomposition of Ti3SiC2. To address this issue, Ti3(SixAl1−x)C2/Al2O3 (x represents the Si content) composites were synthesized for the first time via hot-pressing (HP) sintering and current-assisted sintering (CAS) of mixed Ti3AlC2 and silicon monoxide (SiO) powders at 1300 and 1200 ℃, respectively. Both approaches produced composites with x values greater than 0.9, indicating that the compositions of the prepared composites were similar to those of Ti3SiC2/Al2O3 composites. The synthetic mechanism involved substitution and continuous interdiffusion of Al and Si atoms. The composite prepared by CAS at 1200 ℃ was compacted, whereas the composite prepared by HP had a low density. The low-temperature densification mechanism is attributed to the combined effects of amorphous SiO, liquid Al, and the high heating rates for CAS. The flexural strength and hardness of the composite prepared by CAS were also comparable to those of compacted Ti3SiC2/Al2O3 composites.

Keywords: aluminum oxide (Al2O3), current-assisted sintering (CAS), silicon monoxide (SiO), Ti3(Si,Al)C2

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Received: 10 June 2022
Revised: 29 September 2022
Accepted: 30 September 2022
Published: 23 December 2022
Issue date: January 2023

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© The Author(s) 2022.

Acknowledgements

Authors appreciate the financial support by the Shandong Province Key Research and Development Plan (Grant No. 2020JMRH0401), the National Natural Science Foundation of China (Grant No. 51872118), the Key Research and Development Program of Shandong Province (Grant No. 2019RKB01018), and the Shandong Provincial Natural Science Foundation (Grant Nos. ZR2018PEM008 and ZR2019MEM055). This study was supported by the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology and was financially supported by the National Natural Science Foundation of China (Grant No. 51632003), the Taishan Scholars Program, and the Case-by-Case Project for Top Outstanding Talents of Jinan.

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