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Communication Dans Un Congrès Année : 2008

Evaluation of Haynes230 for Solid Oxide Fuel Cell Interconnect Application

Résumé

Abstract - Interconnects are among the most critical parts for commercialization of SOFCs. They separate the fuel and oxidant gases and provide electric connection between the anode and cathode of adjacent cells. A Ni-based alloy, Haynes230 alloy, was evaluated in this work as a candidate material for SOFC interconnects application. During operation, a scale of chromia forms on Haynes230. Unfortunately, this scale can degrade the fuel cell performances. Thus, protective coatings are required to increase long-term stability. In this study, a nanometric layer made of reactive element oxide (La2O3, Nd2O3 and Y2O3) was applied on alloy surface by MOCVD. Perovskite oxides, such as LaCrO3, NdCrO3 and YCrO3, are then expected to grow during high temperature oxidation processes, because they present a good conductivity at 800°C in air. The first goal of this study was to perform experiments in air and in H2/10%H2O at 800°C in order to validate the coating influence. The second goal of this study was to determine the influence on oxidation resistance of a pre-oxidation on coated and uncoated Haynes230 at 1000°C for 2 hours in air under atmospheric pressure.
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Dates et versions

hal-00493208 , version 1 (18-06-2010)

Identifiants

  • HAL Id : hal-00493208 , version 1

Citer

Sébastien Fontana, Sébastien Chevalier, Gilles Caboche. Evaluation of Haynes230 for Solid Oxide Fuel Cell Interconnect Application. 15th French-Polish Seminar on Reactivity of Solids, Jun 2008, Dijon, France. pp.67-74. ⟨hal-00493208⟩
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