Cobalt-Based Alloys for High Temperature Applications

Rabindra Mahapatra; M. Ashraf Imam; C.S. Lei; C.R. Feng

doi:10.4028/www.scientific.net/MSF.654-656.550

Paper Titles

Fretting Wear Resistance of ATW Cr₃C₂/Ni₃Al Composite Hardfacing on IC6SX
p.532

Isothermal Oxidation Behavior of a New Directionally Solidified Ni-Base Superalloy in Air at Different Temperature
p.538

High Temperature Oxidation Behavior of Si-Mo Ferritic Ductile Cast Iron
p.542

Formation of Protective Intermediate Phase in Ta Addition TiAl during High Temperature Oxidation
p.546

Cobalt-Based Alloys for High Temperature Applications
p.550

Study of a New Type High Strength Ni-Based Superalloy DZ468 with Good Hot Corrosion Resistance
p.554

Oxidation Resistance of Innovative Carbon-Based Materials Results of ExtreMat
p.558

Oxidation of TiAl Alloys Coated by Fluorine Resin in SO₂ Containing Atmosphere
p.562

High-Temperature Sulfurization of Crofer 22APU in H₂/H₂S Atmosphere
p.566

HomeMaterials Science ForumMaterials Science Forum Vols. 654-656Cobalt-Based Alloys for High Temperature...

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).

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Materials Science Forum (Volumes 654-656)

Pages:

550-553

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.654-656.550

Citation:

Cite this paper

Online since:

June 2010

Authors:

Rabindra Mahapatra, M. Ashraf Imam, C.S. Lei, C.R. Feng

Keywords:

Energy Dispersive Spectroscopy, Oxidation Behavior, Scanning Electron Microscope (SEM), TEM, Thermal Stability

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] C. T. Sims, N. S. Stoloff, W.C. Hagel, Superalloy II: High Temperature Materials for Aerospace and Industrial Power, Wiley-interscience, USA, (1987).

Google Scholar

[2] Y. Yamabe-Mitarai, Y. Koizumi, H. Murakami, Y. Ro, T. Maruko, H. Harada, Scipta Materialia, 35 (1996) 211-215.

DOI: 10.1016/1359-6462(96)00109-1

Google Scholar

[3] Y. Yamabe-Mitarai, Y. Ro, T. Maruko, T. Yokokawa, H. Harada, Structural Intermetallics (1997) 805-814.

Google Scholar

[4] R. Suss, D. Freund, R. Volkl, B. Fischer, P, J. Hill, P. Ellis, I. M. Wolff, Materials Science and Engineering, A338 (2002) 133-141.

Google Scholar