Paper Title:
Cobalt-Based Alloys for High Temperature Applications
  Abstract

The isothermal oxidation behavior and thermal stability of a cobalt base alloy was investigated up to a period of 312 hr in air from 1000 to 1200°C. A comparison of oxidation behavior of this alloy with a conventional nickel-base superalloy (Inconel 713C) has been conducted in detail. This experimental alloy oxidizes by forming layers of Al2O3, Cr2O3, TiO2, CoO and traces of SiO2 with WO2 oxides on the surface of the specimen in contact with air. Scanning electron microscopy (SEM) was used to study the microstructure, morphology and compositions of oxides formed after the exposure. Thermal stability of the alloy after extended periods of exposures to air at 1000, 1100 and 1200°C was studied using transmission electron microscopy (TEM).

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
550-553
DOI
10.4028/www.scientific.net/MSF.654-656.550
Citation
R. Mahapatra, A. M. Imam, C.S. Lei, C.R. Feng, "Cobalt-Based Alloys for High Temperature Applications", Materials Science Forum, Vols. 654-656, pp. 550-553, 2010
Online since
June 2010
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Price
$32.00
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