【摘要】 提出了一种用于单晶蓝宝石绿色加工的新型多糖结合剂磨具。设计了磨具的配方和制备工艺,研究了微波处理对多糖凝胶性能的影响。制作了磨具试样并对单晶蓝宝石进行了加工试验。研究发现,随着交联多糖比例的增加,多糖凝胶的结晶度降低。含有交联多糖的磨具试样具有较高的表面硬度。加工试验结果表明,采用这种新型磨具,蓝宝石晶片的表面质量得到了显著的改善。当磨具砂结比为2∶1时,材料去除率可达0.68μm/min,提高磨具砂结比可获得较好的自锐性能,但材料去除能力降低,磨具磨耗增大。初步验证了多糖材料作为磨具结合剂的有效性。更多还原

【Abstract】 A novel polysaccharide-bonded abrasive tool is proposed for the green machining of single-crystal sapphires.The prescription and manufacturing process of the proposed tool is designed, and the gelation property of polysaccharide by microwave treatment is investigated. Abrasive tool samples are fabricated,and a machining experiment on a single-crystal sapphire is performed. It is found that the crystallinity of polysaccharide gel decreases as the proportion of cross-linked polysaccharide increases. Abrasive tool samples with cross-linked polysaccharide present higher surface hardness. With the new abrasive tool,the surface quality of sapphire wafer can be significantly improved. This new tool with an abrasive to binder ratio of 2∶1 attains a material removal rate of 0.68 μm/min. It is found that increasing the abrasive to binder ratio leads to better self-dressing performance but worse material removal ability and greater loss of abrasive tool materials. The validity of polysaccharide as an abrasive tool binder is preliminarily verified.更多还原