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Fabrication of the Fine Magnetic Abrasives by using Mechanical Alloying Process and Its Polishing Characteristics  

Park Sung-Jun (연세대학교 나노과학기술연구단)
Lee Sang-Jo (연세대학교 기계공학부)
Publication Information
Journal of the Korean Society for Precision Engineering / v.21, no.10, 2004 , pp. 34-41 More about this Journal
Abstract
A new method to fabricate the fine magnetic abrasives by using mechanical alloying is proposed. The mechanical alloying process is a solid powder process where the powder particles are subjected to high energetic impact by the balls in a vial. As the powder particles in the vial are continuously impacted by the balls, cold welding between particles and fracturing of the particles take place repeatedly during the ball milling process using a planetary mill. After the manufacturing process, fine magnetic abrasives which the guest abrasive particles c lung to the base metal matrix without bonding material can be obtained. The shape of the newly fabricated fine magnetic abrasives was investigated using SEM and its polishing performance was verified by experiment. It is very helpful to finishing the injection mold steel in final polishing stage. The areal ms surface roughness of the workpiece after several polishing processes has decreased to a few nanometer scales.
Keywords
Magnetic abrasive; Mechanical alloying; Polishing; Cold welding; Fracture; Ball milling; Surface roughness;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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