| JIA Lu-ying,LIAN Yong,ZHANG Jin,HUANG Jin-feng,MA Min-yu,ZHANG Shu-guang,ZHAO Chao,YU Qiang.Surface Modification and Tribological Properties of Magnesium Silicate Hydroxide Powder as Lubricant Additive[J],49(4):213-221 |
| Surface Modification and Tribological Properties of Magnesium Silicate Hydroxide Powder as Lubricant Additive |
| Received:July 18, 2019 Revised:April 20, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2020.04.024 |
| KeyWord:magnesium silicate hydroxide surface modification thermal activation self repairing friction wear |
| Author | Institution |
| JIA Lu-ying |
1.a. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing , China; 2.Beijing Key Laboratory for Corrosion, Erosion and Surface Technology, Beijing , China |
| LIAN Yong |
1.a. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing , China; 2.Beijing Key Laboratory for Corrosion, Erosion and Surface Technology, Beijing , China |
| ZHANG Jin |
1.a. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing , China; 2.Beijing Key Laboratory for Corrosion, Erosion and Surface Technology, Beijing , China |
| HUANG Jin-feng |
1.b. State Key Laboratory of New Metal Materials, University of Science and Technology Beijing, Beijing , China |
| MA Min-yu |
1.a. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing , China; 2.Beijing Key Laboratory for Corrosion, Erosion and Surface Technology, Beijing , China |
| ZHANG Shu-guang |
1.a. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing , China; 2.Beijing Key Laboratory for Corrosion, Erosion and Surface Technology, Beijing , China |
| ZHAO Chao |
1.a. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing , China; 2.Beijing Key Laboratory for Corrosion, Erosion and Surface Technology, Beijing , China |
| YU Qiang |
1.a. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing , China |
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| Abstract: |
| The work aims to study the surface modification and friction properties of magnesium silicate hydroxide powder as the lubricant additive, so as to improve the film forming performance of magnesium silicate hydroxide powder on the worn surface of equipment, reduce the wear and prolong the service life. The phase transformation process of magnesium silicate hydroxide powder was analyzed by SDT Q600. The magnesium silicate hydroxide powder was modified by different surface modifiers. The effect of different concentration and heat treatment temperature on friction and wear properties of magnesium silicate hydroxide was studied by MG-2000 high speed and high temperature friction and wear tester. Magnesium silicate hydroxide desorbed the adsorbed water from room temperature to 500 ℃, desorbed interlayer water and structural water from 500~800 ℃ and then formed new phase forsterite. Crystal structure was reconstructed between 800~860 ℃, and forsterite- diopside phase transition occurred between 860~1100 ℃. After surface modification with oleic acid, long organic chains were introduced into the surface of magnesium silicate hydroxide powder. The modification effect of surface modifiers was: oleic acid>Sipan 80>stearic acid>Tween 80>KH270>KH560. The dynamic balance of wear and self-repair could be easily achieved in a short time when the powder mass fraction was 10%, and good anti-wear and anti-friction effect could be achieved. Activity, dispersibility and film-forming properties could be effectively improved after heat treatment at 200 ℃ and 400 ℃. Oleic acid can effectively improve the dispersibility of magnesium silicate hydroxide powder in lubricating oil. Heat treatment at 200 ℃ and 400 ℃ can effectively improve the dispersibility and film-forming properties of magnesium silicate hydroxide powder in lubricating oil. |
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