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Evaluation of Filler and Counterbody Hardness on Wear Rates in PTFE Composites

ULLAH, SIFAT
http://orcid.org/0000-0001-6168-036X
http://rave.ohiolink.edu/etdc/view?acc_num=miami1625085359877437

Abstract Details

2021, Master of Science, Miami University, Mechanical and Manufacturing Engineering.
Polytetrafluoroethylene (PTFE) is commonly used as a solid lubricant due to its ultralow friction coefficient (µ=0.04~0.20). However, its high wear rate (K~10-4 mm3/Nm) motivated researchers to study its composites to reduce wear. While many fillers can produce up to 1000 times lower wear, certain α-alumina can lower its wear rate up to 10,000 times. Robust tribofilm generation due to tribochemistry is likely the cause of this ultralow wear behavior. The filler particle porosity along with the filler material is considered behind this enhanced tribofilm generation. This study evaluated the effect on composite wear rate due to the ratio of its filler and countersurface hardness. During this investigation,additional ultralow wear low friction PTFE composites were discovered. This study revealed the friction coefficient of PTFE-Cr against brass 260 countersample to be around half that of ultralow wear PTFE α-alumin's (µ=0.12 vs µ=0.2~0.25) while delivering similar wear properties as PTFE α-alumina. It has also revealed that, within the same fillers, a lower wear rate can be distributed around a certain region of hardness ratio of filler and countersamples.
Mark Sidebottom, Dr. (Advisor)
Timothy Cameron, Dr. (Committee Member)
Zhijiang Ye, Dr. (Committee Member)
71 p.
Mechanical Engineering
Tribology, Wear, Friction, Solid Lubricant, Ultralow wear

Recommended Citations

Citations

  • ULLAH, S. (2021). Evaluation of Filler and Counterbody Hardness on Wear Rates in PTFE Composites [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1625085359877437

    APA Style (7th edition)

  • ULLAH, SIFAT. Evaluation of Filler and Counterbody Hardness on Wear Rates in PTFE Composites. 2021. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1625085359877437.

    MLA Style (8th edition)

  • ULLAH, SIFAT. "Evaluation of Filler and Counterbody Hardness on Wear Rates in PTFE Composites." Master's thesis, Miami University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1625085359877437

    Chicago Manual of Style (17th edition)

miami1625085359877437
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This open access ETD is published by Miami University and OhioLINK.