Kim, Chang-Sam Hwang, Sung Ik Ha, Jung-Soo Kang, Seung-Min Cheong, Deock-Soo 2024-01-20T20:01:42Z 2024-01-20T20:01:42Z 2021-09-02 2010-02 1229-9162 https://pubs.kist.re.kr/handle/201004/131764 The Cr2AlC ternary carbide is excellent in chemical and oxidation resistances as well as mechanical properties at high temperatures. Therefore it satisfies most requirements for as an interconnector Material in solid oxide fuel cells (SOFCs). However, its thermal expansion coefficient is higher than those of the anode and cathode so that a high thermal stress is generated unavoidably between them during heating and cooling SOFCs. Thus we attempted to reduce the thermal expansion coefficient through a solid solution with Ti2AlC which has a lower thermal expansion coefficient. Dense and single phase (Cr1-xTix)(2)AlC solid solutions with a relative density of 99.5% or more were synthesized by hot pressing a mixture of CrCx, Ti2C, Al powders at 1250 degrees C for 4 h. The limitation of Ti substitution was found to be less than 20 mol%. When Ti substitution exceeded this limit, unreacted Ti2C, Cr7C3, and Cr3C2 remained as second phases. The grain size decreased with Ti substitution. With 5 mol% Ti substitution, the thermal expansion coefficient could be lowered by 5% compared with the case without substitution in the temperature range of 700-800 degrees C. English KOREAN ASSOC CRYSTAL GROWTH, INC MECHANICAL-PROPERTIES OXIDATION CR2ALC 1300-DEGREES-C TI3SIC2 Synthesis of a Cr2AlC-Ti2AlC ternary carbide Article 1 JOURNAL OF CERAMIC PROCESSING RESEARCH, v.11, no.1, pp.82 - 85 JOURNAL OF CERAMIC PROCESSING RESEARCH 11 1 82 85 scie scopus kci ART001548954 000275783600018 2-s2.0-77950668078 Materials Science, Ceramics Materials Science Article MECHANICAL-PROPERTIES OXIDATION CR2ALC 1300-DEGREES-C TI3SIC2 Cr2AlC Ti2AlC solid solution thermal expansion coefficient oxidation resistance