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To clarify the effect of pores on high temperature compressive behavior due to kink deformation, textured Ti3SiC2 pressureless sintered bodies were fabricated and examined by high temperature compression tests with different porosities. The textured Ti3SiC2 pressureless sintered bodies were prepared by slip casting in a strong magnetic field and spark plasma sintering at 1400℃ for 1 h. Samples were cut into rectangular shape with 45° between the casting direction and the compression axis, and compression tests were conducted at 1200℃ at a strain rate of 3 × 10-4 s-1.　Porosity was evaluated by Archimedes method and binarization. Crystal orientation analysis using EBSD method was performed to observe the microstructure evolution before and after the compression test. The sintered bodies had a strongly textured microstructure with homogeneous dispersed pores. The results of high temperature compression tests showed that the 0.2% proof stress depended on the porosity before compression tests. On the other hand, the work hardening coefficient was larger for plessureless sintered sample with high porosity, which attributed to the densification associated with the compression. Microstructural observations indicated that fine kink bands formed in the middle stage of the compression and then disappeared, suggesting that this is important for clarifying kink-band strengthening in the MAX phase.

権利情報:

• In Copyright
  

キーワード: Ti3SiC2,, kink deformation, texture, porosity, high temperature deformation

刊行年月日: 2025-08-01

出版者: Japan Institute of Metals

掲載誌:

• MATERIALS TRANSACTIONS (ISSN: 13459678) vol. 66 issue. 8 p. 1006-1013 MT-M2025063

研究助成金:

• Japan Society for the Promotion of Science JP21H00087
• Japan Society for the Promotion of Science JP21H00110
• Japan Society for the Promotion of Science JP18H05482

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.2320/matertrans.mt-m2025063

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更新時刻: 2025-09-10 12:30:28 +0900

MDRでの公開時刻: 2025-09-10 12:18:00 +0900