The influence of alumina and titanium carbide, components of magnetic recording sliders, on the carbon gasification reaction was investigated. Pure alumina and titanium carbide powders were each combined with graphite powder and subjected to thermogravimetric analysis (TGA). The molar ratio ranged from 0 to 20 mol percent; graphite powder was the balance. From the thermogravimetric analysis, the activation energy of the reactions was determined. It was found that the activation energy for carbon gasification reduced slightly for increasing alumina mole percentage. Titanium carbide additions markedly increased the activation energy. This increase indicates a competitive oxidation reaction that forms titanium oxide, as confirmed by X-ray diffraction (XRD). As a result of these observations, titanium oxide was also mixed with graphite powders and analyzed by TGA. Titanium oxide has an activation energy behavior that becomes more complex with increasing mole percentage: the activation energy first increases and then decreases. These data are presented and the oxidation reaction is proposed.
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October 2002
Technical Papers
The Effects of Slider Material on the Gasification of Carbon
Ainissa G. Ramirez,
Ainissa G. Ramirez
Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974
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Robert Sinclair,
Robert Sinclair
Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305-2205
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C. Girvin Harkins,
C. Girvin Harkins
Hewlett-Packard Laboratories, 1501 Page Mill Road, Palo Alto, CA 94304
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A. Robert Lin
A. Robert Lin
Hewlett-Packard Laboratories, 1501 Page Mill Road, Palo Alto, CA 94304
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Ainissa G. Ramirez
Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974
Robert Sinclair
Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305-2205
C. Girvin Harkins
Hewlett-Packard Laboratories, 1501 Page Mill Road, Palo Alto, CA 94304
A. Robert Lin
Hewlett-Packard Laboratories, 1501 Page Mill Road, Palo Alto, CA 94304
Contributed by the Tribology Division for publication in the ASME JOURNAL OF TRIBOLOGY. Manuscript received by the Tribology Division October 27, 1998; revised manuscript received November 13, 2001. Associate Editor: A. K. Menon.
J. Tribol. Oct 2002, 124(4): 771-774 (4 pages)
Published Online: September 24, 2002
Article history
Received:
October 27, 1998
Revised:
November 13, 2001
Online:
September 24, 2002
Citation
Ramirez, A. G., Sinclair, R., Harkins , C. G., and Lin, A. R. (September 24, 2002). "The Effects of Slider Material on the Gasification of Carbon ." ASME. J. Tribol. October 2002; 124(4): 771–774. https://doi.org/10.1115/1.1467613
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