@ARTICLE{Yan_Chengqi_Tribological_Early,
 author={Yan, Chengqi and Miao, Xiaopeng and Jia, Zhuying and Zhao, Fei and Zhang, Yong},
 journal={Bulletin of the Polish Academy of Sciences Technical Sciences},
 pages={e154275},
 howpublished={online},
 year={Early Access},
 abstract={With the rapid advances in science and technology, the core parts and techniques in tribo-systems rely on the solidlubricating materials at wide-temperature range for durability, especially for designing and producing materials with low friction coefficient and high wear resistance over a wide temperature ranges. In this paper, a series of NiAl-Ag-Ta-Cr2O3 composite coatings with different contents of Ta and Ag were deposited by plasma spraying, their tribological properties at RT-750 C under dry sliding conditions were investigated by a ball-on-disk tribometer. The friction products and compositions of worn surface at different temperature were investigated. The deposited NiAl-Ag-Ta-Cr2O3 composite coatings exhibited excellent wear resistance at RT (10-7 mm3 /N m), while the friction coefficients lower than 0.5 at RT to 750 C. The contents of Ta and Ag decided mechanical properties of coatings, and greatly affected the tribological properties by creating an tribo-film (lubricant film and glaze layer). NiAl-10Ag-5Ta-20Cr2O3 coating shows better tribological properties over all temperature, while the wear rate reduces to 5 58×10-6 mm3 /N m at 750 C and the friction coefficient reduces to 0.21 at 600 C. The excellent lubrication and wear resistance of composite coatings at high temperatures are mainly attributed to the Ag acted as lubrication phase, and the top surface of wear track was covered with a smooth glaze layer, which consisted of Ag, Ta2O5, Cr2O3 and AgTaO3. In addition, the lubrication mechanism of silver tantalate was also briefly discussed.},
 type={Article},
 title={Tribological properties of plasma sprayed NiAlAg-Ta-Cr2O3 composite lubrication coatings from room temperature to 750 C},
 URL={http://czasopisma.pan.pl/Content/134726/PDF-MASTER/BPASTS-04631-EA.pdf},
 doi={10.24425/bpasts.2025.154275},
 keywords={lubricating coatings, plasma spraying, silver tantalate, wide temperature range},
}