Abstract A systematic study has been performed to investigate the topography and wear characteristics of diamond wheel at different processing stages in grinding of N-BK7 optical glass, including manufacturing, truing, sharpening and grinding. The morphology of the abrasive grains, protrusion height and density were quantitatively evaluated. Moreover, the wear modes of diamond grits, including micro-fracture, macro-fracture, pull-outs and attritious wear, were analyzed based on a comprehensive wear model. The topography disparity at different processing stages is attributed to the microscopic difference of wear mechanism of diamond grits. Interestingly, three wear regions (initial/steady/deteriorated wear) occur during multi-pass grinding, and the most dominant wear behaviors of these three regions are separately macro-fracture and pull-out, micro-fracture and attritious wear, pull-out and wheel loading.

中文翻译：

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N-BK7光学玻璃磨削不同加工阶段金刚石砂轮形貌表征及磨损行为

摘要 系统研究了金刚石砂轮在N-BK7光学玻璃磨削加工、修整、磨削、磨削等不同加工阶段的形貌和磨损特性。定量评价磨粒的形态、突起高度和密度。此外，基于综合磨损模型分析了金刚石磨粒的磨损模式，包括微断裂、宏观断裂、拉拔和摩擦磨损。不同加工阶段的形貌差异归因于金刚石磨粒磨损机制的微观差异。有趣的是，在多道次磨削过程中出现三个磨损区域（初始/稳定/恶化磨损），这三个区域最主要的磨损行为分别是宏观断裂和拉拔，