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Influence of Si contents on tribological characteristics of CrAlSiN nanocomposite coatings.
- Source :
-
Thin Solid Films . Jun2015, Vol. 584, p46-51. 6p. - Publication Year :
- 2015
-
Abstract
- The CrAlSiN coatings with Si contents from 0 at.% to 13.0 at.% were deposited on AISI 304 stainless steels and tungsten carbide by RF magnetron sputtering. In the ball-on-disc wear tests, the improved friction coefficient of (Cr 0.5 Al 0.5 ) 1 − x Si x N coatings with increasing Si content was revealed. The hardness (H) and the reduced elastic modulus ( E ⁎ ) of (Cr 0.5 Al 0.5 ) 1 − x Si x N coatings were acquired by a nanoindentation. The H 3 / E ⁎2 ratio of (Cr 0.5 Al 0.5 ) 1 − x Si x N coatings was found be proportional to the abrasion resistance of coatings, and therefore the (Cr 0.5 Al 0.5 ) 1 − x Si x N coating with maximum H 3 / E ⁎2 ratio as high as 0.475 by adding 9.0 at.% Si exhibited superior resistance to plastic deformation and wear. In addition, it was revealed that the columnar grains of the CrAlN coatings were switched to refined and equi-axial ones after Si addition. From the observation of crack propagation, it was evidenced that the equi-axial grains with sophisticated boundary of (Cr 0.5 Al 0.5 ) 1 − x Si x N coating prevents the direct penetration of the cracks. On the basis of these improved tribological behaviors, the superior durability of (Cr 0.5 Al 0.5 ) 1 − x Si x N coating is thus demonstrated. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00406090
- Volume :
- 584
- Database :
- Academic Search Index
- Journal :
- Thin Solid Films
- Publication Type :
- Academic Journal
- Accession number :
- 102313420
- Full Text :
- https://doi.org/10.1016/j.tsf.2015.02.022