Experimental Study on the Effects of Alumina Abrasive Particle Behavior in MR Polishing for MEMS Applications

Sensors

Dong-Woo Kim¹  Myeong-Woo Cho¹  Tae-Il Seo² 

[1] Division of Mechanical Engineering, Inha University, Incheon 402-751, Korea; E-mails:;Department of Mechanical Engineering, University of Incheon, Incheon 402-751, Korea; E-mail:

关键词: MR (Magnetorhelogical) fluids;    Ultra-precision polishing;    Bingham flow;    Micro machining;   

DOI  :  10.3390/s8010222

来源: mdpi

【 摘 要 】

Recently, the magnetorheological (MR) polishing process has been examined as a new ultra-precision polishing technology for micro parts in MEMS applications. In the MR polishing process, the magnetic force plays a dominant role. This method uses MR fluids which contains micro abrasives as a polishing media. The objective of the present research is to shed light onto the material removal mechanism under various slurry conditions for polishing and to investigate surface characteristics, including shape analysis and surface roughness measurement, of spots obtained from the MR polishing process using alumina abrasives. A series of basic experiments were first performed to determine the optimum polishing conditions for BK7 glass using prepared slurries by changing the process parameters, such as wheel rotating speed and electric current. Using the obtained results, groove polishing was then performed and the results are investigated. Outstanding surface roughness of Ra=3.8nm was obtained on the BK7 glass specimen. The present results highlight the possibility of applying this polishing method to ultra-precision micro parts production, especially in MEMS applications.

【 授权许可】

Unknown   
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