NDLI: The Stability of the Coefficient of Friction and Wear Behavior of C/C

Content Provider	Springer Nature Link
Author	Li, Gen Yan, Qingzhi Jianren, Xi Qi, Guanghui Yang, Xiaotao
Copyright Year	2015
Abstract	To develop a fundamental understanding of the tribological behavior of carbon fiber-reinforced silicon carbide (C/C–SiC) composites as brake pads and discs for high-speed trains, we have studied the brake friction properties of C/C–SiC composites at initial braking speeds ranging from 30 to 63 m/s. The friction mating pairs were fabricated by two methods to obtain composites of different SiC content. The composite with a SiC content of 40.3 % was used as the friction pad, and that with a SiC content of 85.6 % was used as the friction disc. In our experiments, an interesting turning point of 59 m/s was observed: the coefficient of friction (COF) decreased from 0.43 to 0.32 with increases in the braking speed from 30 to 49 m/s, at which braking speed it reached a plateau; the wear rate displayed a cubic curve against initial braking speed and reached a minimum of 315 mm$^{3}$/MJ at 59 m/s. The topographical observations by scanning electron microscope combined with the residual stress analysis revealed that the limited number tribochemical layers, as well as the mismatch of thermal expansion coefficient between the carbon fiber and matrix, contribute to the unusual tribological characteristics of C/C–SiC composites. The experimental results suggest the good tribological potential of self-mated C/C–SiC composites in high-speed working conditions in terms of a steady COF and low wear rate.
Starting Page	1
Ending Page	7
Page Count	7
File Format	PDF
ISSN	10238883
Journal	Tribology Letters
Volume Number	58
Issue Number	1
e-ISSN	15732711
Language	English
Publisher	Springer US
Publisher Date	2015-03-10
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	C/C–SiC Coefficient of friction Wear rates Thermal mismatch Crack propagation Tribology, Corrosion and Coatings Surfaces and Interfaces, Thin Films Theoretical and Applied Mechanics Physical Chemistry Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Mechanics of Materials Mechanical Engineering Surfaces and Interfaces

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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