Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
616881 | Wear | 2016 | 7 Pages |
Abstract
Al2O3/Mo self-lubricating structural ceramics with laminated-structure are potential candidates for high-temperature applications because of their excellent self-lubricating and mechanical performances. This study aims at revealing the mechanisms of how a three-dimensional lubricating layer affects the tribological properties of Al2O3/Mo laminated composites at temperatures from 25 to 800 °C. A three-dimensional lubricating layer was formed by considering texture pattern as storage dimples and coating solid lubricants (SLs) on the textured surface of Al2O3/Mo laminated composite. The friction properties and wear mechanisms at temperature from 25 to 800 °C in a continuous heating process were studied. It is found that the synergy effect of micro-textures and SLs influence the tribological properties of material. Moreover, the tribochemical reaction of SLs stored in the micro-dimples at high temperature improves the lubricating ability of materials, thus realizing continuous lubrication within a wide temperature range. We demonstrated that the friction coefficient of textured surface that coated with MoS2/CaF2-BaF2 SLs was kept lower than 0.50 when subjected to dry sliding wear against Al2O3 ceramic pin at 25-800 °C, and it was even lower than 0.15 and 0.35 at 25-200 °C and 800 °C, respectively. This work is an extension of studies that were previously published in Wear journal.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Yuan Fang, Hengzhong Fan, Junjie Song, Yongsheng Zhang, Litian Hu,