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Insulated polyimide (PI) composites filled with short glass fibers (SGF), polytetrafluoroethylene (PTFE), SiO2, and polyphenylene (PPL) are specially designed, prepared, and the tribological properties are systematically investigated with references to the special requirements for frictional materials used in ultrasonic motors. The hardness and thermal decomposition temperature of the insulated PI composites are comparable to that of conductive PI composites. However, these insulated materials present excellent friction and wear performance, especially under high loads and speeds. Scanning electron microscopy (SEM) analysis of the worn surface indicates that adhesive and fatigue wear dominate the wear mechanisms.


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Comparative study of tribological properties of insulated and conductive polyimide composites

Show Author's information Jingfu SONG1Yuanhao YU2Gai ZHAO2( )Jinhao QIU2( )Qingjun DING2
College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Abstract

Insulated polyimide (PI) composites filled with short glass fibers (SGF), polytetrafluoroethylene (PTFE), SiO2, and polyphenylene (PPL) are specially designed, prepared, and the tribological properties are systematically investigated with references to the special requirements for frictional materials used in ultrasonic motors. The hardness and thermal decomposition temperature of the insulated PI composites are comparable to that of conductive PI composites. However, these insulated materials present excellent friction and wear performance, especially under high loads and speeds. Scanning electron microscopy (SEM) analysis of the worn surface indicates that adhesive and fatigue wear dominate the wear mechanisms.

Keywords: friction, wear, insulation, polyimide composites

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Publication history

Received: 12 October 2018
Revised: 15 December 2018
Accepted: 28 December 2018
Published: 01 April 2019
Issue date: June 2020

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© The author(s) 2019

Acknowledgements

This work is supported by the Fundamental Research Funds for the Central Universities (NS2018010), the Major State Basic Research Development Program of China (973 Program, Grant No. 2015CB057501), and a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.

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