Ab'/> Evaluation of boron-doped-microcrystalline/nanocrystalline diamond composite coatings in drilling of CFRP
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Evaluation of boron-doped-microcrystalline/nanocrystalline diamond composite coatings in drilling of CFRP

机译：CFRP钻孔中硼掺杂微晶/纳米晶金刚石复合涂层的评价

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AbstractThe drilling performance of four typical types of single-layer diamond coated drills and two-layer boron-doped-microcrystalline/nanocrystalline diamond (BDMC-NCD) composite coated drill is compared, and the growth duration ratio of the NCD layer to the BDMCD layer (N/B) is optimized. It is demonstrated that the BDMC-NCD film synthesized using properN/Bshows nice adhesion, moderate diamond quality and a smooth surface mostly composed of nano-sized diamond grains, so it shows the best comprehensive performance, including the thrust force reduction, the improvement of the hole quality, the slowing of the tool wear and coating peeling, and the elongation of the tool lifetime. Taking the time of the coating peeling into consideration, 3/9 is the optimumN/Bfor the BDMC-NCD coated drill, and such the drill also performs the longest lifetime using delamination factors (Fd) of 1.2 or 1.3 as the failure criteria. Moreover, the failure mode of the diamond coated drill is the flank wear when usingFd=1.1 or 1.2 as the failure criteria, while the tool failure should be related to the coating peeling whenFd=1.3.Highlights
机译：<！[cdata [ 抽象 四种典型类型的单层金刚石涂层钻头和双层硼掺杂微晶的钻孔性能/纳米晶金刚石（BDMC-NCD）复合涂层进行比较，并且NCD层与BDMCD层的生长持续时间比（ N / B ）进行了优化。结果证明，使用适当的 n / b：斜体>显示出良好的附着力，适度的金刚石质量和光滑的表面主要由纳米大小的钻石谷物组成，所以它显示了良好的粘合剂最佳综合性能，包括推力减少，孔质量的提高，工具磨损和涂层的速度慢，以及工具寿命的伸长率。考虑到涂层剥离的时间，3/9是最佳 n / b 对于BDMC-NCD涂层钻头，并且这种钻头也使用分层因子进行最长的寿命（ f d ）为1.2或1.3作为故障标准。此外，当使用 f d = 1.1或1.2作为故障标准，而刀具故障应与涂层剥离时 f < CE：斜体> d = 1.3。 亮点

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