4/3/2023 0 Comments How to polish dlc coating![]() Literature on tribologically induced changes of hybridisation of DLCs is somewhat lacking. 1–4 DLC coatings with high sp 3 fractions are frequently regarded as intrinsically low wearing, due to their high hardness. One prominent example of this is the change in sp 2 : sp 3 ratio that can occur upon high-temperature heating of DLC coatings. ![]() transform from carbon sp 3 to sp 2 bonds). Like many carbonaceous materials, they are able to undergo changes in carbon hybridisation state, or “re-hybridise” ( i.e. Introduction DLC coatings are designed to be inherently low wearing materials. In comparison, the Si,O-doped DLC undergoes comparatively little change in carbon hybridisation state. The undoped a-C:H DLC coating shows an increase in non-planar sp 2 carbon content during wear testing which appears to be at the expense of sp 3-hybridised carbon. Both coatings show formation of protective tribofilms with tribochemically-relevant elements derived from the lubricant additives however the tribofilms on the two coatings exhibit key differences, with one containing pyrophosphate. The wear of the undoped a-C:H DLC coating is far lower than that of the Si,O-doped DLC. Physical–chemical characterisation allows the elucidation of both the physical and tribochemical mechanisms underpinning the respective wear behaviours. ![]() Two diamond-like carbon coatings have been examined, both prior to, and post tribotesting. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |