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- Title
Effect of Nano-ZrO on the Microstructure and High Temperature Tribological Properties of MoSi Coating.
- Authors
Yan, Jianhui; Zhang, Zhi; Liu, Longfei; Xu, Hongmei; Mao, Zhengyu
- Abstract
Molybdenum disilicide (MoSi)-based composite coating using nano-ZrO as an additive was deposited on a nickel-based alloy by air plasma spraying, and the phase composition and microstructure of the composite coating were characterized by x-ray diffraction (XRD) and scanning electron microscope. The high-temperature abrasive wear properties of the ZrO-MoSi composite coating were compared with the pure MoSi coating at 1100 °C. The XRD results show that there exists mutual transformation between T-MoSi and H-MoSi phase and part of Mo-rich phases are formed because of oxidization during the spraying processing. The addition of nano-ZrO could improve the adhesion between the splats, prevent cracking along the interface between the splats, and purify the boundaries. The ZrO-MoSi composite coating exhibits improved wear resistance compared with the pure MoSi coating. The addition of nano-ZrO could effectively mitigate the adhesion wear and brittle delamination of the MoSi coating.
- Subjects
ZIRCONIUM oxide; NANOSTRUCTURED materials; HIGH temperatures; TRIBOLOGY; MOLYBDENUM disilicide; NICKEL alloys; PLASMA spraying; MICROSTRUCTURE
- Publication
Journal of Thermal Spray Technology, 2013, Vol 22, Issue 6, p873
- ISSN
1059-9630
- Publication type
Article
- DOI
10.1007/s11666-013-9924-9