Paper Title:
Isothermal Oxidation Behavior of Ni Base Superalloy DM02 for High Temperature Dies
  Abstract

The isothermal oxidation behavior of a new developed Ni base superalloy named DM02 for high temperature dies was studied in this paper. The dynamic curve was achieved by monitoring weight gain of the alloy as a function of time. The results showed that the alloy had fairly good oxidation resistance at 1050°C and 1100°C. The oxidation kinetics at both 1050°C and 1100°C followed parabolic rules in segment. It has been found that the oxidation of the alloy was controlled by multi-oxides of (Ni, Co)O, (Ni, Co)Al2O4, and NiWO4, growth mechanism in the primary stage, and by Al2O3, NiAl2O4 growth mechanism in the following stage. After oxidation at 1050°C for 100h, the oxide scale of the alloy was mainly composed of two areas. Some were thin uniform (Ni, Co)Al2O4(outer)/Al2O3 (inner) composites scale and others were multi-layer oxide scale of ( Ni,Co)O / multi-oxides (mainly NiWO4、NiO and NiAl2O4.) /Al2O3.

  Info
Periodical
Materials Science Forum (Volumes 546-549)
Edited by
Yafang Han et al.
Pages
1253-1256
DOI
10.4028/www.scientific.net/MSF.546-549.1253
Citation
Q. Li, J. X. Song, C. B. Xiao, S. Y. Qu, D. G. Wang, Y. F. Han, "Isothermal Oxidation Behavior of Ni Base Superalloy DM02 for High Temperature Dies", Materials Science Forum, Vols. 546-549, pp. 1253-1256, 2007
Online since
May 2007
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$32.00
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