ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
CrN coatings were deposited on cemented carbide substrates by filtered cathodic vacuumarc technique (FCVA). The effect of different deposition parameters: nitrogen partial pressure,substrate-bias voltage and preheating of the substrate, on the structural and mechanical properties ofthe coating was investigated. X-ray diffraction analysis was used to determine the structure andcomposition of the coatings. The tribological behaviour and wear properties of the coatings againstSi3N4 ball at different normal loads were studied under reciprocating sliding condition. The resultsshowed that a smooth and dense CrN coating with good properties can be obtained provided a pure Crinterlayer was pre-deposited. The optimal deposition parameters were the nitrogen partial pressure of0.1 Pa, substrate-bias voltage of -100 V. Preheating of the substrate was no good for improving theproperties of the coating. The FCVA CrN coating showed high hardness and good wear resistance,which was probably attributed to its smooth surface and dense microstructure. The wear mechanismof the CrN coating was a combination of abrasion and oxidation. However, the coating flaked off athigh normal load due to the deficient adhesion strength of the coating to the substrate
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.130.pdf
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