Title: Electrolytic in-process dressing grinding of sapphire with nanodiamond composite wheel

Authors: Teruko Kato; Hiroshi Kasuga; Hitoshi Ohmori; Nobuhide Itoh

Addresses: RIKEN, 1-7-13, Kaga, Itabashi-ku, Tokyo, 173-0003, Japan ' RIKEN, 1-7-13, Kaga, Itabashi-ku, Tokyo, 173-0003, Japan ' RIKEN, 1-7-13, Kaga, Itabashi-ku, Tokyo, 173-0003, Japan ' Ibaraki University, 4-12-1, Nakanarusawa, Hitachi, 316-8511, Japan

Abstract: In this paper, nanodiamond (ND) was applied to a processing additives used in the manufacture to a wheel for grinding sapphire. Nanodiamond was produced by the detonation of trinitrotoluene explosives technique, and the tribological characteristics of ND solution were investigated. Sapphire was a difficult material to process with high quality, precision and efficiency. With the aim of reducing friction and friction heat between the wheel and sapphire surfaces, metal resin bonded diamond wheels (#2000, average grain size: 8 µm) containing ND with 0.2, 1.0, and 2.0 vol.% were produced. Appropriate machining parameters were selected for electrolytic in-process dressing (ELID)-grinding process (Ohmori and Nakagawa, 1990), and the grinding behaviour of sapphire was evaluated. In summary, an extremely smooth surface of sapphire wafer was fabricated by using the #2000 metal resin bonded diamond wheel containing 2.0 volume percent ND and a rotary in-feed grinder with ELID.

Keywords: ELID grinding; electrolytic in-process dressing; sapphire grinding; nanodiamond; metal resin bonded diamond wheels; tribological characteristics; tribology; friction.

DOI: 10.1504/IJNM.2013.057594

International Journal of Nanomanufacturing, 2013 Vol.9 No.5/6, pp.510 - 519

Received: 16 Nov 2012
Accepted: 21 Feb 2013
Published online: 31 Mar 2014 *

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