For diamond coating, natural fragile property easily leads to fracture, delamination and peeling, which seriously inhibits the applications in many industrial fields. In order to prolong the lifetime, improving the toughness under impact load is essential for diamond coating. In this work, a novel method was proposed by the conventional CVD diamond technique combining with the particles, with which the nanocrystalline diamond (NCD) coating with W particles (W-NCD) was fabricated to evaluate the impact behavior. The pure NCD coating was also produced for comparison. Repeating impact testing was performed to evaluate the impact resistance of the as-deposited NCD coatings. The results showed that the diamond coating can be fabricated on the substrate with W particles. The indentation scar revealed that the W-NCD coating had the stronger impact resistance than the NCD coating. Ratcheting effect was employed to discuss the impact properties of NCD coating for the first time. The coating integrity played a vital role in ratcheting displacement. Repeating impact can make the NCD and W-NCD coatings soft, and the W particles can accelerate the softening process. Hence, embedding particles can provide a potential and valid method to enhance the impact resistance of diamond coating that was very important for the fragile coating.

中文翻译：

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嵌入钨颗粒对金刚石涂层抗冲击性的影响

对于金刚石涂层而言，天然脆性易导致断裂、分层和剥落，严重制约了其在许多工业领域的应用。为了延长使用寿命，提高冲击载荷下的韧性对于金刚石涂层至关重要。在这项工作中，提出了一种将常规 CVD 金刚石技术与颗粒相结合的新方法，利用该方法制备了具有 W 颗粒的纳米晶金刚石 (NCD) 涂层 (W-NCD) 以评估冲击行为。还生产了纯 NCD 涂层用于比较。进行重复冲击测试以评估沉积的 NCD 涂层的抗冲击性。结果表明，金刚石涂层可以在含有W颗粒的基体上制备。压痕表明W-NCD涂层比NCD涂层具有更强的抗冲击性。首次采用棘轮效应讨论NCD涂层的冲击性能。涂层完整性在棘轮位移中起着至关重要的作用。反复冲击可使NCD和W-NCD涂层变软，W颗粒可加速软化过程。因此，嵌入颗粒可以提供一种潜在且有效的方法来增强金刚石涂层的抗冲击性，这对于易碎涂层非常重要。W颗粒可以加速软化过程。因此，嵌入颗粒可以提供一种潜在且有效的方法来增强金刚石涂层的抗冲击性，这对于易碎涂层非常重要。W颗粒可以加速软化过程。因此，嵌入颗粒可以提供一种潜在且有效的方法来增强金刚石涂层的抗冲击性，这对于易碎涂层非常重要。