Effects of B_2O_3, TiO_2, and ZnO on the Performance of Fe-Based Diamond Cutting-Tool Matrix
Effects of B_2O_3, TiO_2, and ZnO on the Performance of Fe-Based Diamond Cutting-Tool Matrix
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DOI：
10.1007/s11665-022-07753-w
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发表时间：
2022-12
影响因子：
2.3
通讯作者：
Jianan Zhang;L. Duan;Mingfeng Li;Songcheng Tan;Wenjiao Zhang;B. Pan;Hui Gao
中科院分区：
文献类型：
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作者：
Jianan Zhang;L. Duan;Mingfeng Li;Songcheng Tan;Wenjiao Zhang;B. Pan;Hui Gao
为了提高金刚石刀具在干燥工况下的使用性能，创新性地采用B2O3、TiO2和ZnO三种氧化物制备了氧化物自润滑金刚石刀具基体。通过洛氏硬度、三点抗弯强度和相对密度测试，从宏观上确定了氧化物对金刚石刀具基体力学性能的影响，并综合运用SEM、EDS、粗糙度测试、物理和分子动态模拟干磨损试验，探讨了氧化物对金刚石刀具基体磨损行为的影响。试验结果表明，适量的氧化物能提高金刚石刀具基体的摩擦学性能，但会在一定程度上降低其力学性能。此外，氧化物在干磨损过程中通过改变其分子基形态而更容易滑动。随着疲劳磨损和断裂磨粒磨损的减小，金刚石刀具基体的耐磨性提高。
To improve the service performance of diamond cutting tools under dry working conditions, three oxides (B2O3, TiO2, and ZnO) were innovatively used to prepare oxide self-lubricating diamond cutting-tool matrix. Rockwell hardness, three-point bending strength, and relative density tests were conducted to determine the effects of oxides on the mechanical properties of diamond cutting-tool matrix from the macroscale, whereas SEM, EDS, roughness test, physical, and molecular-dynamic-simulated dry-wear tests were used synthetically to explore the effects of oxides on the wear behavior of diamond cutting-tool matrix. Test results indicated that proper oxide addition improved the tribological properties of diamond cutting-tool matrix but decreased its mechanical properties to some degree. Furthermore, oxides more easily slid during the dry-wear process by changing its molecular-group morphologies. Consequently, self-lubricating films were generated and the wear resistance of the diamond cutting-tool matrix increased with the decrease in fatigue wear and fractured abrasive wear.