Wear Performance of the Plasma Sprayed Fine WC-Co Composite Powders Coatings
| Periodical | Advanced Materials Research (Volume 454) |
|---|---|
| Main Theme | Powder Technology & Application IV |
| Edited by | Shujuan Dai |
| Pages | 144-147 |
| DOI | 10.4028/www.scientific.net/AMR.454.144 |
| Citation | Lian Wei Yang et al., 2012, Advanced Materials Research, 454, 144 |
| Online since | January, 2012 |
| Authors | Lian Wei Yang, Jin Hui Li, Yun Dong, Xiao Ping Lin |
| Keywords | Composite Coating, Friction, Plasma Spraying, WC/Co, Wear |
| Price | US$ 28,- |
WC/Co; Composite coating; Plasma spraying; Friction and wear Abstract: WC- Co composite powders were synthesized by direct mechanical grinding in a rotary-vibration mill under 8h, and then analyzed by SEM and XRD. WC and WC/Co composite coatings were prepared by supersonic plasma spraying fine WC-Co composite powders. The wear and friction properties of both coatings were evaluated. The results showed that the wear resistance of the WC/Co composite coating was superior to that of the WC coating. The improvement in wear resistance of the WC/Co composite coating was attributed to its higher fracture toughness and adhesion strength as well as better thermal diffusivity. As for the WC/Co composite coating, the mechanism was mainly adhesion with micro-abrasion and fatigued-induced brittle fracture within splats, and the delamination along splat boundaries only occurred at high load. However, the failure of the WC coating was predominantly detachment of transferred film and brittle fracture within the splats and delamination along splat boundaries, which were enhanced with the increasing load.
