Xia Yue, Lu Yunxiang, Yang Guoyong, Chen Chengke, Hu Xiaojun, Song Hui, Deng Lifen, Wang Yuezhong, Yi Jian, Wang Bo
College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
Materials (Basel). 2023 Mar 28;16(7):2710. doi: 10.3390/ma16072710.
Nano-crystalline diamond has been extensively researched and applied in the fields of tribology, optics, quantum information and biomedicine. In virtue of its hardness, the highest in natural materials, diamond outperforms the other materials in terms of wear resistance. Compared to traditional single-crystalline and poly-crystalline diamonds, nano-crystalline diamond consists of disordered grains and thus possesses good toughness and self-sharpening. These merits render nano-crystalline diamonds to have great potential in tribology. Moreover, the re-nucleation of nano-crystalline diamond during preparation is beneficial to decreasing surface roughness due to its ultrafine grain size. Nano-crystalline diamond coatings can have a friction coefficient as low as single-crystal diamonds. This article briefly introduces the approaches to preparing nano-crystalline diamond materials and summarizes their applications in the field of tribology. Firstly, nano-crystalline diamond powders can be used as additives in both oil- and water-based lubricants to significantly enhance their anti-wear property. Nano-crystalline diamond coatings can also act as self-lubricating films when they are deposited on different substrates, exhibiting excellent performance in friction reduction and wear resistance. In addition, the research works related to the tribological applications of nano-crystalline diamond composites have also been reviewed in this paper.
纳米晶金刚石已在摩擦学、光学、量子信息和生物医学等领域得到广泛研究和应用。由于其硬度是天然材料中最高的，金刚石在耐磨性方面优于其他材料。与传统的单晶和多晶金刚石相比，纳米晶金刚石由无序晶粒组成，因此具有良好的韧性和自锐性。这些优点使纳米晶金刚石在摩擦学中具有巨大潜力。此外，纳米晶金刚石在制备过程中的再结晶有利于降低表面粗糙度，因为其晶粒尺寸极细。纳米晶金刚石涂层的摩擦系数可低至单晶金刚石。本文简要介绍了纳米晶金刚石材料的制备方法，并总结了它们在摩擦学领域的应用。首先，纳米晶金刚石粉末可作为添加剂用于油基和水基润滑剂中，以显著提高其抗磨性能。当纳米晶金刚石涂层沉积在不同的基体上时，也可作为自润滑膜，在减摩和耐磨方面表现出优异的性能。此外，本文还综述了与纳米晶金刚石复合材料摩擦学应用相关的研究工作。
