Preparation method of solid self-lubricating material with high temperature resistance

US12359142B2 · kind B2 · utility

Assignee

• WUHAN RESEARCH INSTITUTE OF MATERIALS PROTECTION · CN

Inventors

• Haitao Duan · 红钢城街道, CN
• Changxin Wan · 红钢城街道, CN
• Shengpeng Zhan · 红钢城街道, CN
• Dan Jia · 红钢城街道, CN
• Jian Li · Hubei, CN
• Wulin Zhang · Beijing, CN
• Tian Yang · 红钢城街道, CN
• Yinhua Li · Shangrao, CN

Key dates

• Filing date: Dec 12, 2022
• Grant date: Jul 15, 2025
• Expiry date: Sep 23, 2043

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2070/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

This invention provides a preparation method of solid self-lubricating material with high temperature resistance, including steps described as follows: first, mixing polymer matrix resin and nano lubricating filler to compose a uniform raw material powders; then, placing the raw material powders in the cavity of hot-press die; keeping the temperature for 90-120 min at the first prepressing temperature, controlling the hot-pressing pressure under the third pre-loading pressure, and gradually increasing the temperature to the solid-phase molding temperature of the material; gradually reducing the temperature to the first preloading temperature after the solid-phase molding is completed; next, removing the pressure, finally, obtaining the solid self-lubricating material by naturally cooling to normal temperature and demoulding. This invention adjusts the hot-pressing molding temperature according to the drift value of glass transition temperature, in order to avoid the degradation of tribological properties and mechanical properties caused by uneven plasticization and overheating of composite materials during the compression molding process.