Thermal stability of atmospheric plasma sprayed (Ni, Cu, Co)-YSZ and Ni-Cu-Co-YSZ anodes cermets for SOFC application

Amel Benyoucef , Didier Klein , Olivier Rapaud , Christian Coddet , Boumediene Benyoucef

This paper reports the results of the thermal stability study of M-YSZ (M= Ni, Cu, Co, Cu-Co, Ni-Cu-Co) SOFC anode cermets materials at different heat treatment temperatures. The cermets were elaborated by atmospheric plasma spraying (APS) with optimised conditions and then submitted to heat treatments at 800°C and 1000°C, respectively. Scanning electron microscopy and X-ray diffraction were used to characterise, respectively, the morphology and structure of obtained films, before and after thermal annealing. A correlation was made between the differential scanning calorimetry analysis results and those obtained by X-ray diffraction. Focusing, in this study, on YSZ matrix thermal stability, the obtained results were as following: the monometallic cermets with the lowest amount of metal and the trimetallic one, exhibited a good stability at 800°C whereas at 1000°C, all considered cermets, were unstable with an eutectoid decomposition of YSZ matrix.

Mots clés: A. ceramics; A. metals; B. plasma deposition; C. X-ray diffraction; C. Differential scanning calorimetry (DSC)

Amel Benyoucef, Didier Klein, Olivier Rapaud, Christian Coddet, Boumediene Benyoucef. Thermal stability of atmospheric plasma sprayed (Ni, Cu, Co)-YSZ and Ni-Cu-Co-YSZ anodes cermets for SOFC application. Journal of Physics and Chemistry of Solids, 2009, 70 (12), pp.1487. ⟨10.1016/j.jpcs.2009.09.009⟩. ⟨hal-00590599⟩