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Title: Articles comprising ferritic stainless steels

An article of manufacture comprises a ferritic stainless steel that includes a near-surface region depleted of silicon relative to a remainder of the ferritic stainless steel. The article has a reduced tendency to form an electrically resistive silica layer including silicon derived from the steel when the article is subjected to high temperature oxidizing conditions. The ferritic stainless steel is selected from the group comprising AISI Type 430 stainless steel, AISI Type 439 stainless steel, AISI Type 441 stainless steel, AISI Type 444 stainless steel, and E-BRITE.RTM. alloy, also known as UNS 44627 stainless steel. In certain embodiments, the article of manufacture is a fuel cell interconnect for a solid oxide fuel cell.
Inventors:
Issue Date:
OSTI Identifier:
1259648
Assignee:
ATI PROPERTIES, INC. (Albany, OR) NETL
Patent Number(s):
9,376,741
Application Number:
13/873,270
Contract Number:
FC26-05NT42513
Resource Relation:
Patent File Date: 2013 Apr 30
Research Org:
ATI PROPERTIES, INC., Albany, OR (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 30 DIRECT ENERGY CONVERSION

Works referenced in this record:

Effect of minor elements and a Ce surface treatment on the oxidation behavior of an Fe–22Cr–0.5Mn (Crofer 22 APU) ferritic stainless steel
journal, November 2007

The Oxidation of Ferritic Stainless Steels in Simulated Solid-Oxide Fuel-Cell Atmospheres
journal, January 2007
  • Hammer, J. E.; Laney, S. J.; Jackson, R. W.
  • Oxidation of Metals, Vol. 67, Issue 1-2, p. 1-38
  • DOI: 10.1007/s11085-006-9041-y

Protective coating on stainless steel interconnect for SOFCs: oxidation kinetics and electrical properties
journal, February 2005
  • Chen, Xuan; Hou, Peggy Y.; Jacobson, Craig P.
  • Solid State Ionics, Vol. 176, Issue 5-6, p. 425-433
  • DOI: 10.1016/j.ssi.2004.10.004