Paper Title:
The Effect of Oxidation on The Structure and Hardness of (Zr, Hf)N Coatings
  Abstract

In the present study, the effect of oxidation on the structure and the hardness of ternary (Zr, Hf)N coatings, whose Hf content was varied between 0 and 21 wt.%, has been systematically examined. Coatings were applied on AISI D2 tool steel plates by arc physical vapor deposition (PVD). Oxidation was conducted at 400oC for times up to 12 h in air. Ternary (Zr, Hf)N coatings are found to be more susceptible towards oxidation compared to binary ZrN coating. Oxidation caused the formation of a mixed oxide layer composed of ZrO2 and HfO2. Formation of oxide layer was accompanied by a reduction in hardness. Hardness values of Hf free and Hf alloyed (Zr, Hf)N coatings were very close to each other both in as-deposited and oxidized states.

  Info
Periodical
Defect and Diffusion Forum (Volumes 297-301)
Edited by
Andreas Öchsner, Graeme E. Murch, Ali Shokuhfar and João M.P.Q. Delgado
Pages
1395-1399
DOI
10.4028/www.scientific.net/DDF.297-301.1395
Citation
E. Atar, E.S. Kayali, H. Cimenoglu, "The Effect of Oxidation on The Structure and Hardness of (Zr, Hf)N Coatings", Defect and Diffusion Forum, Vols. 297-301, pp. 1395-1399, 2010
Online since
April 2010
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$32.00
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