ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
In this study, austempered ductile iron (ADI) substrate containing acicular ferrite andhigh-carbon austenite in the microstructure is made by austempering treatment at 360[removed info]. Cathodicarc evaporation (CAE) coating technique was used to coat DLC, TiN and TiAlN films on ADI forsurface modification. The results showed that the three coatings could be successfully coated ontoADI through CAE process without altering the unique microstructure of ADI. The structures of thecoatings were identified by XRD, Raman and TEM, respectively. After HRC indentation testing, itwas found that nodular graphite was the initial site of cracking for the coatings and then peeled.Surface roughness of all coated specimens was increased because the droplets generated on thesubstrate surface during the CAE process. Coated ADI had better wearability performance thanuncoated ADI due to higher surface hardness. Coated specimens exhibited higher corrosionresistance than uncoated ones when they were immersed in separate solutions of both 3.5 wt. %NaCl and 10 vol. % HCl. In particular, TiAlN had the best corrosion resistance among the coatedspecimens
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/22/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.118.257.pdf
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