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Information × Registration Number 0220U101096, 0119U101944 , R & D reports Title Light-weight Ti-Si-C-based interconnect for solid oxide fuel cell application popup.stage_title Head Brodnikovskyi Yehor M., Registration Date 31-01-2020 Organization Institute for Problems in Materials Science popup.description2 Interconnect is a key component of the ceramic fuel cell stack. The interconnect material influence greatly on SOFC stack characteristics and its lifetime. Metal-based alloy interconnects are used for low- and medium-temperature SOFC (600-700 °C). Modern interconnect materials are ferrite stainless steels with a high content of chromium, which is one of the main causes of SOFC degradation during long-term operation and, as a result, a decrease in the overall efficiency of the entire SOFC stack. This work is devoted to the development of modern material based on the Ti-Si-C system for use as a SOFC interconnect, and to study its properties under the conditions of the SOFC operation. The Ti-Si-C composite was selected as a potential material of the SOFC interconnect due to its unique properties (density is 4.5 g / cm3, specific conductivity is 0.21 · 106 (Ohm o m) -1, CTE = 9.1 · 10-6 K-1 close to 8YSZ - 11 · 10-6 K-1). Also, the selected material does not contain chromium, what should solve the problem of chromium poisoning of the components of the SOFC The Ti-Si-C powder was synthesized at the IPM NAS of Ukraine. The synthesized Powder consisted of Ti3SiC2 + TiC + Ti5Si3 + TiSi2. The amount of MAX phase Ti5SiC2 was 56.8%. Free titanium is absent. Thus, the obtained material can be used in hydrogen environments. At the Institute of Plasma Physics (Czech Republic), the obtained powder was sintered by means of spark-plasma sintering (SPS) by modes: sintering temperature 1200 and 1400 °C, sintering time 5 minutes and pressure 60 MPa. The sintered specimens had a required surface and a porosity up to 5%. Ti-Si-C composite specimens sintered at 1200 and 1400 °C had a Vickers hardness of 257.4 ± 12.3 and 1001.7 ± 39.4 HV10, respectively. The structure and phase composition of specimens sintered with SPS at 1200 and 1400 ° C were investigated. As a result of sintering, the amount of Ti5SiC2 max-phase in the samples decreased to 37.6 ? 44.8 and 18.3 ? 23.6%, dependi Product Description popup.authors Brodnikovskа Irynа V. Brodnikovskyi Dmytro M. Golovkova Maryna E Pinchuk Mykyta O. Polishko Ihor O Sav'yak Mariya P Yaroslav Grygorovych H. popup.nrat_date 2020-04-02 Close