ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
In order to improve adhesion strength between TiN coatings and WC-Co substrate, twokinds of interlayer of Co and Ti were pre-deposited before TiN coating process. Thickness and postannealingeffects of each interlayer on the adhesion property were investigated through scratch testin this work. Introduction of thin Ti interlayer largely enhanced the adhesion strength between TiNcoatings and WC-Co substrate in scratch test. The critical load, Lc2 increased from 64 N without Tiinterlayer up to 130N with Ti one of ~ 0.15[removed info] thickness. However, post-annealing of TiN/Ti/WCCosystem at high temperature of 600[removed info] reduced the critical load again. The Ti interlayer caused adeficit of Co content in WC-Co substrate during annealing through diffusion of Co element into Tiinterlayer. The reduction of critical load after post-annealing was believed due to diminution inmechanical properties of the substrate derived from the Co deficit in WC-Co substrate. On the otherhand, introduction of thin Co interlayer of ~ 0.027[removed info] thickness also increased the critical load up to84 N and improved failure mode, but did not reduce the critical load even after annealing, ratherincreased it. And, any Co deficit of the substrate was not found after annealing for TiN/Co/WC-Cosystem
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/22/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.118.281.pdf
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