Reciprocating friction and wear of polyimide composites filled with solid lubricants
-
Jingfu Song
,
Qingjun Ding
Abstract
High-performance engineering polymers are a potential frictional material candidate for mechanical systems with moving parts, especially at high load and speed conditions. In this study, reciprocating friction and wear of aramid fibers/polyimide composites filled with graphite, MoS2 or Polytetrafluoroethylene, respectively, were systematically investigated on a Pin-on-Flat test rig. The experimental setup was simplified into friction materials reciprocating against a phosphor bronze pin to simulate the rotor/stator contact state in ultrasonic motors. A comparative study on friction reduction and wear resistance of polyimide composites indicated that graphite showed the best lubricity with low friction coefficient and wear rate. Experimental results of pressure time average velocity measurements showed that frequencies ranging from 3 to 11 Hz played a significant role on the friction coefficient variations of these porous polyimide composites, whereas increasing pressure from 4 to 6 MPa had little effect on friction reduction. Then, the microstructure of the worn surface of the three different materials was observed by scanning electron microscope to reveal the wear mechanisms. This study is expected to provide a good guidance for porous polyimide composites application in ultrasonic motors.
Acknowledgements
This work was supported by National Natural Science Foundation of China (no. 51403101), the Major State Basic Research Development Program of China (973 Program, grant no. 2015CB057501), the Fundamental Research Funds for the Central Universities (NJ20160002), and a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.
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©2018 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Material properties
- Persistent inhibition performance of amine polymers to inhibit clay swelling
- Evaluation of stearic acid modified industrial lime sludge waste as a filler in high density polyethylene composites
- Effects of graphene surface energy on the structure and mechanical properties of phenolic foams
- Experimental and theoretical investigations of the high performance blends of PEEK/PEI
- Reciprocating friction and wear of polyimide composites filled with solid lubricants
- Dual pH-/temperature-responsive and fluorescent hydrogel for controlled drug delivery
- Thermoelectric behavior of PEDOT:PSS/CNT/graphene composites
- Investigating the properties of maleated poly(lactic acid) and its effect on poly(lactic acid)/cellulose nanofiber composites
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Articles in the same Issue
- Frontmatter
- Material properties
- Persistent inhibition performance of amine polymers to inhibit clay swelling
- Evaluation of stearic acid modified industrial lime sludge waste as a filler in high density polyethylene composites
- Effects of graphene surface energy on the structure and mechanical properties of phenolic foams
- Experimental and theoretical investigations of the high performance blends of PEEK/PEI
- Reciprocating friction and wear of polyimide composites filled with solid lubricants
- Dual pH-/temperature-responsive and fluorescent hydrogel for controlled drug delivery
- Thermoelectric behavior of PEDOT:PSS/CNT/graphene composites
- Investigating the properties of maleated poly(lactic acid) and its effect on poly(lactic acid)/cellulose nanofiber composites
- Preparation of graphene and its application in polycarbonate/acrylonitrile-butadiene-styrene composites
- Preparation and assembly
- Electrospinning of poly(lactic acid)/polycaprolactone blends: investigation of the governing parameters and biocompatibility
