單顆金剛石磨?虅澦{(lán)寶石的試驗(yàn)研究
[Abstract]:Sapphire has been widely used in many fields due to its excellent physical, chemical, electrical and optical properties. The cutting and grinding of sapphire is an important process in the process of sapphire processing. At present, diamond abrasive tools are mainly used to complete the cutting and grinding of sapphire. However, the mechanism of diamond abrasive interaction with sapphire at micron scale has not been fully explained. In this paper, the removal mechanism of sapphire material has been studied by the method of single diamond abrasive. In this paper, two kinds of diamond abrasive particles with different top cone angles are used to test the indentation, translation, rotation and pendulum of A plane and C plane sapphire at micron scale. The normal force and tangential force at different scratching speed and depth were collected and the surface morphology of the workpiece was observed. The effect of the parameters on the material removal and the difference of the sapphire with different crystal faces are compared and analyzed. The main research results are summarized as follows: (1) the sapphire material is deformed along a certain direction under the action of diamond abrasive indentation and cracks occur outside the abrasive particle. The crystal structure has obvious influence on the crack direction of sapphire under compression. The lateral crack length of C plane sapphire is slightly smaller than that of A plane sapphire. (2) in all the characterization tests, The top cone angle of abrasive particles has an obvious influence on the scratching force, and the scratching force increases with the increase of the top cone angle, while the scratching force of C plane sapphire is greater than that of A plane sapphire. (3) with the increase of the depth of the engraving, the scratching force increases obviously. At low speed, the scratching speed has no obvious effect on the scratching force, but at high speed, the scratching force decreases slightly with the increase of the velocity. (4) at the micron scale, the brittle fracture is the dominant factor in the surface A and C sapphire. Under the action of diamond abrasive particles, obvious cracks and crushing of powder are formed. For A side sapphire, there are fluvial cracks in the affected zone of abrasive particles, while for C plane sapphire there are steps.
【學(xué)位授予單位】:華僑大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2016
【分類(lèi)號(hào)】:TQ164
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