Heat-resistant alloy, alloy member for fuel cell, fuel cell stack device, fuel cell module, and fuel cell device

摘要

A heat-resistant alloy capable of effectively suppressing diffusion of Cr, as well as an alloy member for a fuel cell, a fuel cell stack device, a fuel cell module and a fuel cell device are provided. A heat-resistant alloy includes a Cr-containing alloy, and a Cr-diffusion suppression layer located on at least a part of a surface of the Cr-containing alloy, the Cr-diffusion suppression layer being made by laminating a first layer that contains a Zn-containing oxide and a second layer that does not contain ZnO but contains an (La, Sr)MnO3-based perovskite oxide in that order, so that it is possible to effectively suppress diffusion of Cr. By using the heat-resistant alloy for an alloy member for a fuel cell, a fuel cell stack device, a fuel cell module and a fuel cell device each having improved reliability can be obtained.

主权项

1. A current collecting member configured to electrically connect a plurality of fuel cells to one another, formed of an alloy member for a fuel cell formed of a heat-resistant alloy, the heat-resistant alloy comprising:
a Cr-containing alloy; and a Cr-diffusion suppression layer located on at least a part of a surface of the Cr-containing alloy, the Cr-diffusion suppression layer being composed of
a first layer that is disposed directly on the Cr-containing alloy and contains a Zn-containing oxide, anda second layer that is disposed directly on the first layer and does not contain ZnO but contains an (La, Sr) MnO3-based perovskite oxide and an (La, Sr)(Co, Fe)O3-based perovskite oxide, the second layer containing at least 1 mass % of the (La, Sr)MnO3-based perovskite oxide.