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The influence of metallic interlayers on the adhesion of pVD TiN coatings on high-speed steel
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
2007 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 264, no 9-10, 885-892 p.Article in journal (Refereed) Published
Abstract [en]

In nearly all applications the adhesion of the coating to the substrate is crucial for the components performance and length of life. To enhance the adhesion it is common to use a metallic interlayer, most often titanium. In this study seven different metallic interlayers, namely W, Mo, Nb, Cr, Ti, Ag and Al, have been evaluated with respect to their influence on the adhesion of PVD TiN coatings to polished high-speed steel, ASP 2060. The purpose of this work is to investigate how some physical properties of a metal affect its capability to function as an adhesion interlayer. Samples were prepared using dc magnetron sputtering for the interlayer and reactive dc magnetron sputtering for the TiN coating. The deposition process included both pre-treatments and in situ treatments of the substrate surface in order to eliminate possible contaminations. The adhesion of the coatings was investigated with two different methods: scratch testing and Rockwell adhesion testing. The results indicate that differences in hardness between the metallic interlayers influence the practical adhesion more than differences in E-modulus. Furthermore, in order to optimize adhesion, the hardness of the interlayer should be close to the hardness of the substrate. It was also suggested that stresses, both in the TiN coating and in the metallic interlayer, affect the adhesion properties negatively. In addition, the necessity of interlayer in TiN on HSS can be questioned as the reference samples, without interlayer, showed adhesion properties comparable to the highest ranked interlayer containing samples in our assessment.

Place, publisher, year, edition, pages
2007. Vol. 264, no 9-10, 885-892 p.
Keyword [en]
Metallic interlayer, Adhesion, Titanium nitride, Scratch test, Rockwell adhesion test
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-13298DOI: 10.1016/j.wear.2006.11.053ISI: 000255117700019OAI: oai:DiVA.org:uu-13298DiVA: diva2:41068
Available from: 2008-01-22 Created: 2008-01-22 Last updated: 2017-12-11Bibliographically approved

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Gerth, JuliaWiklund, Urban

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