The effect of manganese additions on the reactive evaporation of chromium in Ni–Cr alloys

• Published in: Scripta materialia Vol. 54; no. 10; pp. 1821 - 1825
• Main Authors: Holcomb, Gordon R., Alman, David E.
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Ltd 01.05.2006; Elsevier Science; Elsevier Ltd. on behalf of Acta Materialia Inc
• Subjects: 08 HYDROGEN; ALLOYS; Applied sciences; CHROMIUM; Chromium base alloys; CHROMIUM OXIDES; DEPOSITION; EFFICIENCY; ELECTRODES; EVAPORATION; Exact sciences and technology; FUEL CELLS; interconnect; Intermetallic compounds; MANGANESE; MANGANESE ADDITIONS; MATERIALS SCIENCE; Metals. Metallurgy; Nickel alloys; Nickel base alloys; Oxidation; OXYGEN; solid oxide fuel cell; SOLID OXIDE FUEL CELLS; SOLID SOLUTIONS; SPINELS; STAINLESS STEELS; Thermodynamics; WATER VAPOR; Thermodynamics; Oxidation; Nickel alloys; Evaporation; Nickel base alloys; Chromium alloy; Manganese addition; Composition effect
• ISSN: 1359-6462; 0956-716X; 1872-8456
• DOI: 10.1016/j.scriptamat.2006.01.026

Chromium oxide undergoes reactive evaporation at high temperatures in the presence of oxygen and/or water vapor. The deposition of gaseous chromium species onto solid oxide fuel cell electrodes can reduce the efficiency of the fuel cell. Manganese additions can lead to the formation of manganese–chromium spinels, which can reduce chromium evaporation by as much as a factor of 35 at 800 °C and 55 at 700 °C.