Abstract
In this study, a high-efficiency mirror finishing method which is named “one-pass mirror finish grinding” has been discussed, in which the mirror finishing is accomplished by only one pass grinding operation. In this report, a metal bonded fine grain diamond wheel (MU diamond wheel) has been newly developed by using a high tin bronze bond and its grinding performance has been investigated to establish the one-pass mirror finish grinding technology for various fine ceramics. Main results are summarized as follows : (1) In grinding the representative fine ceramics such as Al2O3-TiC, SiC and Si3N4, the MU diamond wheels can generate the mirror surface with roughness of 30-80 nmRmax by only one pass grinding operation, in which the material removal rate reaches 4-10 mm3/mm·min. (2) As the MU diamond wheels have an excellent ability for keeping the grinding sharpness as well as a high wear resistance, in grinding Al2O3-TiC ceramics, they can continue over a long time to generate the mirror surface with roughness of less than 50 nmRmax without dressing and in this case the grinding ratio reaches about 400.
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