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

Zhenyu ZHANG; Jun JI; Yingying CHEN; Deli MA; Sique CHEN; Hailing YANG; Guopu SHI; Zhi WANG; Mengyong SUN; Fei CHEN; Shifeng HUANG; Qinggang LI

doi:10.26599/JAC.2023.9220669

Journal of Advanced Ceramics (Jan 2023)

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

Zhenyu ZHANG,
Jun JI,
Yingying CHEN,
Deli MA,
Sique CHEN,
Hailing YANG,
Guopu SHI,
Zhi WANG,
Mengyong SUN,
Fei CHEN,
Shifeng HUANG,
Qinggang LI

Affiliations

Zhenyu ZHANG: Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China
Jun JI: School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
Yingying CHEN: School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
Deli MA: Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China
Sique CHEN: School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
Hailing YANG: Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China
Guopu SHI: School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
Zhi WANG: School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
Mengyong SUN: 52 Institute of China North Industries Group, Yantai 264003, China
Fei CHEN: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
Shifeng HUANG: Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China
Qinggang LI: Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China

DOI: https://doi.org/10.26599/JAC.2023.9220669
Journal volume & issue: Vol. 12, no. 1
pp. 93 – 110

Abstract

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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.

Published in Journal of Advanced Ceramics

ISSN: 2226-4108 (Print); 2227-8508 (Online)
Publisher: Tsinghua University Press
Country of publisher: China
LCC subjects: Technology: Chemical technology: Clay industries. Ceramics. Glass
Website: https://www.sciopen.com/journal/2226-4108

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