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Electrolytic in-process dressing grinding of sapphire with nanodiamond composite wheel
by Teruko Kato; Hiroshi Kasuga; Hitoshi Ohmori; Nobuhide Itoh
International Journal of Nanomanufacturing (IJNM), Vol. 9, No. 5/6, 2013


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.

Online publication date: Wed, 13-Nov-2013


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