期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 38, 期 10, 页码 3660-3672出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2018.04.019
关键词
Plasma spraying; TiO2-CNTs coating; Microstructure; Tribological behavior
资金
- National Natural Science Foundation of China [51675531, 51535011]
- Beijing Municipal Natural Science Foundation [3172038]
- Tribology Science Fund of State Key Laboratory of Tribology [SKLTKF16A05]
Intrinsic structural limitations of plasma-spray TiO2 coating deteriorate its wear resistance. Herein, CNTs are incorporated in the coating to assess their effects on the microstructure and tribological properties. Structurally, degradation degree of CNTs in TiO2 matrix during plasma spraying was revealed by Raman spectroscopy. And high resolution transmission electron microscopy manifested that TiO2/CNT interface was well bonded along with presence of notable interfacial carbothermic product TinO2n-1 at atomic scale. The phenomenon indicates a beneficial effect for transferring stress from matrix to CNTs effectively Then, the influence of CNTs on coating's friction behavior was investigated by zirconia ball-on-disk tribometer under dry-sliding condition. As compared to TiO2 coating, the nanocomposite coating exhibited a moderate decrease in friction coefficient and an enormous reduction ( similar to 93.6%) in wear volume. The remarkable advance in tribological properties of the reinforced coating can be attributed to four kinds of frictional effects of CNTs. tribo-reorientation, tribo-protruding, tribo-film and tribo-degradation.
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