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Article
Influence of Oxygen Partial Pressure on the Physical Properties of Chromium Alumina Cermets
Powder Metallurgy International
  • P. D. Ownby, Missouri University of Science and Technology
  • C. P. Lahmann
Abstract

The signficance of the equilibrium oxygen pressure for the formation of chromium sesquioxide in sintering is extended to other oxide systems containing chronium. In chromium-alumina cermets the influence of the sintering oxygen pressure on the ambient flexural strength, Young's modulus, fracture behavior measured by Kic factor, and thermal shock behavior is shown. The strength dependence begins ather the equilibrium is exceeded. The maximum strength is nearly 40% higher within a decade above the equilibrium oxygen partial pressure. The fracture toughness has shown an inverse relationship with oxygen partial pressure. The mechanical behavior is interpreted from the microstructure in terms of the degree and type of oxidation of the chromium particles an its effects on the interfacial strength.

Department(s)
Materials Science and Engineering
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 1975 Springer Verlag, All rights reserved.
Publication Date
1-1-1975
Citation Information
P. D. Ownby and C. P. Lahmann. "Influence of Oxygen Partial Pressure on the Physical Properties of Chromium Alumina Cermets" Powder Metallurgy International (1975)
Available at: http://works.bepress.com/p_ownby/154/