The thermal model developed in Part I of this three-part series is applied in this paper to magnetic float polishing (MFP) of ceramic (Si3N4) balls. Using this method, the flash temperatures, flash times, and temperature distribution at the interface between the balls and the shaft of the MFP apparatus are calculated. Examination of the polished surfaces (scratch lengths) of the balls showed that the length of most scratches during the final stage of polishing is <20 μm and most are formed under transient conditions. But because of the small area of contact and low load encountered in MFP, the results of the calculations under these conditions were found to be very close to the quasi-steady-state conditions. However, it is not possible to know a priori if the conditions are transient or quasi-steady state unless solutions are available for each case. The use of the general solution developed in Part I enables this determination. The minimum flash temperatures and minimum flash times that occur during polishing ensure the determination if adequate temperatures are generated for chemo-mechanical polishing to take place. Of course, the lengths of the scratches would be much longer and the corresponding flash duration longer during the semifinishing operation than during flnishing. The combined temperature and flash duration would determine the extent of chemo-mechanical action under these conditions. The flash temperatures and flash times required for chemo-mechanical action can be used as a basis for the optimization of polishing conditions in MFP.
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October 1998
Research Papers
Magnetic Field Assisted Finishing of Ceramics—Part II: On the Thermal Aspects of Magnetic Float Polishing (MFP) of Ceramic Balls
Zhen-Bing Hou,
Zhen-Bing Hou
Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, OK 74078
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R. Komanduri
R. Komanduri
Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, OK 74078
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Zhen-Bing Hou
Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, OK 74078
R. Komanduri
Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, OK 74078
J. Tribol. Oct 1998, 120(4): 652-659 (8 pages)
Published Online: October 1, 1998
Article history
Received:
August 1, 1995
Revised:
October 20, 1997
Online:
January 24, 2008
Connected Content
This is a companion to:
Magnetic Field Assisted Finishing of Ceramics—Part I: Thermal Model
Citation
Hou, Z., and Komanduri, R. (October 1, 1998). "Magnetic Field Assisted Finishing of Ceramics—Part II: On the Thermal Aspects of Magnetic Float Polishing (MFP) of Ceramic Balls." ASME. J. Tribol. October 1998; 120(4): 652–659. https://doi.org/10.1115/1.2833762
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