کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1656929 | 1517601 | 2015 | 9 صفحه PDF | دانلود رایگان |
• A segment-structured hydrogen-free a-C film was fabricated by the FCVA method.
• The internal stress of the hydrogen-free a-C film was reduced by the segmented structure.
• A low coefficient of friction and wear rate were obtained for the segment-structured hydrogen-free a-C film.
• The wear resistance of the segment-structured hydrogen-free a-C film depends on the film thickness.
• The results suggest a possible route for the further tribological improvement of surface coatings.
In this work, the mechanical and tribological behavior of segment-structured hydrogen-free a-C films deposited on silicon and SUS403 substrates has been studied and compared with those of conventional hydrogen-free a-C films. Segment-structured hydrogen-free a-C films were fabricated using metal meshes as masks by filtered cathodic vacuum arc (FCVA) system. It was found that segment-structured hydrogen-free a-C films (220 × 220 μm2 of segment with 30 μm of groove width) have approximately 25% less internal stress than a continuous film without changing their mechanical properties. The maximum film thicknesses were 500 and 600 nm for silicon and SUS403 substrates, respectively owing to a limitation imposed by high compressive stress. Tribological test results indicate that the segment-structured hydrogen-free a-C films have excellent wear resistance and a lower friction coefficient than conventional hydrogen-free a-C films. The role of grooves in reducing internal stress and trapping the wear debris explains this better performance. Furthermore, a thicker segment-structured hydrogen-free a-C film can suppress the intensive wear of the segment edge. Overall results indicate that the segment-structured hydrogen-free a-C films have the advantages of reduced stress and improved the tribological performance.
Journal: Surface and Coatings Technology - Volume 278, 25 September 2015, Pages 71–79