This paper deals with the improvement in surface properties and microscratch resistance of graphites by means of an ultrasonic nanocrystalline surface modification (UNSM) technique. The surface roughness and surface hardness of the untreated and UNSM-treated graphites were investigated using an atomic force microscopy (AFM) and a microhardness tester, respectively. The scratch resistance was assessed using a microscratch tester at a progressive load. Moreover, a Raman spectroscopy was employed to characterize the microstructure of graphites before and after UNSM treatment. The scratch test results revealed that the resistance to scratch of both UNSM-treated graphites was found to be better in comparison with the untreated graphites. The increase in scratch resistance of both UNSM-treated graphites may be mainly attributed to the reduced surface roughness and increased surface hardness by UNSM treatment. The graphite produced by Poco exhibited a higher resistance to scratch compared to that of the graphite produced by Mersen. The objective of this study is to extend the service life of three-dimensional (3D) cover glass moldings made of graphite by the application of UNSM treatment through the understanding the effects of surface roughness and surface hardness on the scratch defect generation behavior during glass molding process.
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January 2018
Research-Article
Improvement in Microscratch Resistance of Graphite by Surface Modification for Molding Applications
Auezhan Amanov,
Auezhan Amanov
Mechanical Engineering Department,
Sun Moon University,
100, Kalsan-ri,
Asan 31460, South Korea
e-mail: amanov_a@yahoo.com
Sun Moon University,
100, Kalsan-ri,
Asan 31460, South Korea
e-mail: amanov_a@yahoo.com
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Bakhtiyor Urmanov,
Bakhtiyor Urmanov
Mechanical Engineering Department,
Sun Moon University,
100, Kalsan-ri,
Asan 31460, South Korea
e-mail: bakhtiyor.urmanov@gmail.com
Sun Moon University,
100, Kalsan-ri,
Asan 31460, South Korea
e-mail: bakhtiyor.urmanov@gmail.com
Search for other works by this author on:
Ki-Chol Kim,
Ki-Chol Kim
Mechanical Engineering and
ICT Convergence Department,
Sun Moon University,
100, Kalsan-ri,
Asan 31460, South Korea
e-mail: kkc84517657@daum.net
ICT Convergence Department,
Sun Moon University,
100, Kalsan-ri,
Asan 31460, South Korea
e-mail: kkc84517657@daum.net
Search for other works by this author on:
Young-Sik Pyun
Young-Sik Pyun
Mechanical Engineering Department,
Sun Moon University,
100, Kalsan-ri,
Asan 31460, South Korea
e-mail: pyoun@sunmoon.ac.kr
Sun Moon University,
100, Kalsan-ri,
Asan 31460, South Korea
e-mail: pyoun@sunmoon.ac.kr
Search for other works by this author on:
Auezhan Amanov
Mechanical Engineering Department,
Sun Moon University,
100, Kalsan-ri,
Asan 31460, South Korea
e-mail: amanov_a@yahoo.com
Sun Moon University,
100, Kalsan-ri,
Asan 31460, South Korea
e-mail: amanov_a@yahoo.com
Bakhtiyor Urmanov
Mechanical Engineering Department,
Sun Moon University,
100, Kalsan-ri,
Asan 31460, South Korea
e-mail: bakhtiyor.urmanov@gmail.com
Sun Moon University,
100, Kalsan-ri,
Asan 31460, South Korea
e-mail: bakhtiyor.urmanov@gmail.com
Ki-Chol Kim
Mechanical Engineering and
ICT Convergence Department,
Sun Moon University,
100, Kalsan-ri,
Asan 31460, South Korea
e-mail: kkc84517657@daum.net
ICT Convergence Department,
Sun Moon University,
100, Kalsan-ri,
Asan 31460, South Korea
e-mail: kkc84517657@daum.net
Young-Sik Pyun
Mechanical Engineering Department,
Sun Moon University,
100, Kalsan-ri,
Asan 31460, South Korea
e-mail: pyoun@sunmoon.ac.kr
Sun Moon University,
100, Kalsan-ri,
Asan 31460, South Korea
e-mail: pyoun@sunmoon.ac.kr
1Corresponding author.
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received January 4, 2017; final manuscript received April 18, 2017; published online July 21, 2017. Assoc. Editor: Dae-Eun Kim.
J. Tribol. Jan 2018, 140(1): 011602 (6 pages)
Published Online: July 21, 2017
Article history
Received:
January 4, 2017
Revised:
April 18, 2017
Citation
Amanov, A., Urmanov, B., Kim, K., and Pyun, Y. (July 21, 2017). "Improvement in Microscratch Resistance of Graphite by Surface Modification for Molding Applications." ASME. J. Tribol. January 2018; 140(1): 011602. https://doi.org/10.1115/1.4036721
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