Ultra-short pulsed laser processing of single crystalline diamonds for tooling applications

IF 1.7 4区 工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Kiran Michael, Lukas Greiner, Philip Dreizehnter, Jodok Weixler, Matthias Putzer, Timo Schudeleit, Markus Bambach, Konrad Wegener
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Abstract

This study investigates the feasibility of using ultra-short pulsed (USP) lasers to fabricate single crystalline diamond (SCD) tools. SCD has exceptional mechanical, tribological, and thermal properties and offers excellent performance in the precision machining of hard and brittle materials over polycrystalline diamond and diamond-coated tools. However, the anisotropic nature of the SCD makes it difficult for laser machining because the material shows susceptibility to cracking, defect growth, and breakout depending on its crystallographic orientation. Anisotropy needs to be considered while optimizing the geometry of the tool to minimize wear and improve tool performance. An advanced four-axis laser machining approach with optimized laser parameters and temporal beam shaping is used to mitigate challenges related to defect growth and orientation dependence, leading to the production of high-quality single cutting-edge SCD tools. Cylindrical diamonds and diamond crystals with top surface planes {100} and {111} are used in the study. The occurrence of defects in the diamond when laser machined and their dependence on the crystallographic orientation along the circumference of the diamond is thoroughly investigated via SEM, electron backscatter diffraction, and light microscopy images. Finally, the laser-manufactured SCD tools are tested by turning fully sintered zirconia ceramics (3Y-TZP-A). USP laser machining of SCD is demonstrated to be a viable alternative to traditional manufacturing methods for producing high-quality SCD tools with unique properties and performance. The results further emphasize the importance of understanding the crystallographic orientation dependence when laser machining crystalline materials like diamonds.
刀具单晶金刚石的超短脉冲激光加工
本研究探讨了利用超短脉冲(USP)激光制造单晶金刚石(SCD)刀具的可行性。SCD具有卓越的机械、摩擦学和热性能,在硬脆材料的精密加工中,比聚晶金刚石和金刚石涂层工具提供了卓越的性能。然而,SCD的各向异性使得激光加工变得困难,因为材料显示出对裂纹、缺陷生长和破裂的敏感性,这取决于其晶体取向。在优化刀具几何形状时,需要考虑各向异性,以尽量减少磨损并提高刀具性能。采用先进的四轴激光加工方法,优化激光参数和时间光束整形,以减轻与缺陷生长和方向依赖相关的挑战,从而生产出高质量的单件尖端SCD刀具。研究中使用了顶面为{100}和{111}的圆柱形金刚石和金刚石晶体。通过扫描电子显微镜、电子背散射衍射和光学显微图像,深入研究了激光加工金刚石中缺陷的发生及其与金刚石周长晶体取向的关系。最后,通过车削完全烧结的氧化锆陶瓷(3Y-TZP-A)来测试激光制造的SCD工具。USP激光加工SCD被证明是一种可行的替代传统制造方法,以生产具有独特性能和性能的高质量SCD刀具。研究结果进一步强调了在激光加工金刚石等晶体材料时,了解晶体取向依赖性的重要性。
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来源期刊
CiteScore
3.60
自引率
9.50%
发文量
125
审稿时长
>12 weeks
期刊介绍: The Journal of Laser Applications (JLA) is the scientific platform of the Laser Institute of America (LIA) and is published in cooperation with AIP Publishing. The high-quality articles cover a broad range from fundamental and applied research and development to industrial applications. Therefore, JLA is a reflection of the state-of-R&D in photonic production, sensing and measurement as well as Laser safety. The following international and well known first-class scientists serve as allocated Editors in 9 new categories: High Precision Materials Processing with Ultrafast Lasers Laser Additive Manufacturing High Power Materials Processing with High Brightness Lasers Emerging Applications of Laser Technologies in High-performance/Multi-function Materials and Structures Surface Modification Lasers in Nanomanufacturing / Nanophotonics & Thin Film Technology Spectroscopy / Imaging / Diagnostics / Measurements Laser Systems and Markets Medical Applications & Safety Thermal Transportation Nanomaterials and Nanoprocessing Laser applications in Microelectronics.
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