2013年10月23日星期三

Diamond crystals are cubic plane

Diamond crystals are cubic plane, since each crystal form and surface atomic arrangement atom density difference and the distance between the different planes, resulting in a natural diamond crystal anisotropy, so the performance of the diamond crystal surface only metal cutting wheel  of the physical and mechanical different performance, ease of manufacture and service life which are not the same, the microstructure of the crystal surface damage strength are also significant differences. Microscopic diamond crystals Hertz strength test method used to determine, since the diamond is a typical brittle material, the strength values ​​are generally larger deviation depends on the morphology and distribution of stress distribution range, so suitable analysis of probability theory. When the effect of stress is the same, (110) crystal plane maximum probability of damage, (111), followed by (100) crystal  ceramic belt plane of the minimum probability of breakage. Ie external force, (110) crystal face the most easily damaged, (111) crystal face, followed by (100) the most difficult to break. Although the (110) crystal plane grinding is higher than the (100) crystal plane, but the experimental results show that the (100) crystal face and the other plane has a higher resistance to stress, corrosion, and thermal degradation capability. Considering the combination of micro-strength, a (100) plane around the flank of the tool to make easy tool edge grinding of high quality, easy to produce microscopic chipping.

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