Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8023412 | Surface and Coatings Technology | 2018 | 9 Pages |
Abstract
Spray-dried nanostructured TiO2/Bi2O3 feedstock powders were successfully incorporated into plasma sprayed NiAl composite coatings. The tribological properties of the composite coatings from RT to 800â¯Â°C were investigated. The results show that the nanostructured TiO2/Bi2O3 phases performed the typical bimodal microstructure resulting in a significant enhancement of mechanical and tribological properties of the composite coatings. The lowered friction and wear at 800â¯Â°C is attributed to the synergistic lubricating effect of Bi4Ti3O12 and NiTiO3 formed on worn surfaces by tribo-chemical reactions together with TiO2 and NiO. A continuous lubricating layer including NiTiO3 and Al2TiO5 was formed on counterfaces, which further improved the tribological behavior of composite coating at high temperatures.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Xinpeng Wang, Xiaochun Feng, Cheng Lu, Gewen Yi, Junhong Jia, Hongchun Li,