Self-repairing properties of complex titanium grease containing hydroxyl silicate

• Published in: Tribology international Vol. 149; p. 105685
• Main Authors: Jianjun, Qu, Huajie, Qu, Zhongpu, Wen, Yunxia, Luo
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.09.2020; Elsevier BV
• Subjects: Chemical reactions; Coefficient of friction; Complex titanium grease; Dosage; Friction; Hydroxyl silicate; Magnesium silicates; Photoelectrons; Self-repairing; Substrates; Titanium; Wear; Hydroxyl silicate; Complex titanium grease; Friction; Self-repairing; Wear
• ISSN: 0301-679X; 1879-2464
• DOI: 10.1016/j.triboint.2019.03.043

With magnesium hydroxyl silicate modifiers, a kind of complex titanium grease was prepared containing magnesium hydroxyl silicate modifier. Using four-ball friction and wear testing machine, The dosage of magnesium hydroxyl silicate modifier was studied on the influence of friction coefficient and wear spot diameter, the best dosage was obtained. By using M − 200 wear testing machine, friction and wear test of complex titanium grease containing the best dosage of modifier was tested for 30 h. The results show that the complex titanium grease containing magnesium hydroxyl silicate modifier has better anti-friction and anti-wear properties and self-repairing function. The surfaces of the steel sample testing for 10 h, 20 h and 30 h are respectively analyzed based on SEM and X-ray Photoelectron Spectrometer. It is shown that the self-repairing film on the steel surface can be formed after 10–20 h’ friction. The self-repairing mechanism of magnesium silicate modifier was explored. A kind of self-repairing model was proposed by adding magnesium hydroxyl silicate modifier to the complex titanium grease. It is concluded that the microscopic particles of magnesium hydroxyl silicate modifier generate adsorbent substance on the surface of steel substrate to repair the wear surface through a series of physical and chemical reaction. •The hydroxyl magnesium silicate modifier can improve the frictional wear properties of the complex titanium grease.•A lubrication model of complex titanium grease containing hydroxyl magnesium silicate modifier is proposed.