CONCEPT, THEORY, DESIGN AND EXPERIMENTAL TESTS OF SELFPOWERED LUBRICATION IN CERAMIC COMPOSITE AND ROTORS
Kim, J., Jang, H., Nam, K., Xu, J. (2014). CONCEPT, THEORY, DESIGN AND EXPERIMENTAL TESTS OF SELFPOWERED LUBRICATION IN CERAMIC COMPOSITE AND ROTORS. EKB Journal Management System, 16(16th International Conference on Applied Mechanics and Mechanical Engineering.), 1-12. doi: 10.21608/amme.2014.35567
J. H. Kim; H. L. Jang; K. T. Nam; J. Xu. "CONCEPT, THEORY, DESIGN AND EXPERIMENTAL TESTS OF SELFPOWERED LUBRICATION IN CERAMIC COMPOSITE AND ROTORS". EKB Journal Management System, 16, 16th International Conference on Applied Mechanics and Mechanical Engineering., 2014, 1-12. doi: 10.21608/amme.2014.35567
Kim, J., Jang, H., Nam, K., Xu, J. (2014). 'CONCEPT, THEORY, DESIGN AND EXPERIMENTAL TESTS OF SELFPOWERED LUBRICATION IN CERAMIC COMPOSITE AND ROTORS', EKB Journal Management System, 16(16th International Conference on Applied Mechanics and Mechanical Engineering.), pp. 1-12. doi: 10.21608/amme.2014.35567
Kim, J., Jang, H., Nam, K., Xu, J. CONCEPT, THEORY, DESIGN AND EXPERIMENTAL TESTS OF SELFPOWERED LUBRICATION IN CERAMIC COMPOSITE AND ROTORS. EKB Journal Management System, 2014; 16(16th International Conference on Applied Mechanics and Mechanical Engineering.): 1-12. doi: 10.21608/amme.2014.35567

CONCEPT, THEORY, DESIGN AND EXPERIMENTAL TESTS OF SELFPOWERED LUBRICATION IN CERAMIC COMPOSITE AND ROTORS

The International Conference on Applied Mechanics and Mechanical Engineering
Article 30, Volume 16, 16th International Conference on Applied Mechanics and Mechanical Engineering., May 2014, Page 1-12  XML PDF (1.98 MB)
Document Type: Original Article
DOI: 10.21608/amme.2014.35567
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Authors
J. H. Kim1; H. L. Jang2; K. T. Nam3; J. Xu4
1Doctoral Researcher, School of Engineering, Brown University, Providence, USA.
2PhD Candidate, Dpt. of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea.
3Professor, Dpt. of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea.
4Professor, School of Engineering and Dept. of Physics, Brown University, Providence, USA.
Abstract
ABSTRACT
Due to a modulus of elasticity higher than that of high carbon chrome bearing steel,
ceramic rolling elements exhibit less deformation at contact points and therefore a
greater stress under the same load. Combined with a lower thermal conductivity,
their working temperature increases and their load capacity decreases more rapidly
in operation. In Nature, we have a ceramic composite system, Bone, known for its
superior load-bearing capacity, and its self-protection at the high-stress movingcontact
points (joints) with built-in lubrication. Less known but no less important is
the fact that it has a built-in capillary networks for self-powered supply of lubricants
and coolants, as well as nutrient and growth factor, from within. It has served as an
inspiration to an effort and a model system for the study we report here that aim to
Incorporate some of these functionalities into man-made composite structures. In
this report, we first highlight our attempt to develop a method for generating networks
of micro- and nano-capillaries within a ceramic composite structure during the
sintering process. We then present test results of self-powered supply of fluids to
the contact (load-bearing) surface via the capillary networks from the fluid reservoir.
As a further extension, a self-regulation mechanism is added into the design to
enable temperature-controlled self-powered lubrication, and tested in a model
system. The method is adaptable to various structural shapes, and scalable in size,
and to both biophysiologic and mechanic composite systems.
Keywords
Ceramic rotors and engines; Composite; phase-change; bio-mechanics; lubrication
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