Paper Title:
Effects of Combined Surface Modification on Adhesion Strength of CrN Coatings for STS420
  Abstract

In order to improve the durability and performance of molds and tools, diverse methods of surface modification are used where the adhesion strength between a substrate and coating plays an important role. To improve adhesion strength, a combined surface modification method is often utilized. In this study, adhesion strength and microstructure of various combined surface modifications (i.e., ion-nitriding, Cr intermediate layer, CrN layer and nitrogen ion- implantation) were examined on STS420. Phase constituents, microstructure, adhesion strength and hardness of coating-substrate system with combined surface modification were examined by using optical microscopy, X-ray diffraction, transmission electron microscopy, scratch test, and nano-indentation. The highest adhesion strength was observed when CrN coating was formed by nitrogen implantation on ion-nitrided substrate with a Cr-intermediate layer. Influence of processing sequence and combination is related to microstructural observations and adhesion strength.

  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
1334-1339
DOI
10.4028/www.scientific.net/DDF.297-301.1334
Citation
G.C. Jeong, H.J. Choi, Y. H. Sohn, S.I. Kwun, "Effects of Combined Surface Modification on Adhesion Strength of CrN Coatings for STS420", Defect and Diffusion Forum, Vols. 297-301, pp. 1334-1339, 2010
Online since
April 2010
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$32.00
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