For engineering applications, hardness must be complimented with high toughness for applications where high contact loads are there. A good combination of hardness, toughness and low coefficient of friction can be achieved, by suitable tailoring of microstructures of coating in hard nanocomposite coatings. Tribologocal applications require hard coatings with tailored functionalities for different applications; hard nanocomposite coatings are potential materials for such applications. Ti and amorphous carbon based systems have shown more promising material. The present review discusses the nanocomposite hard coatings, mechanism of enhancement of toughness, multilayer hard nanocomposite coatings. Here, mainly Ti and Si based nanocomposite has been discussed as carbon based reviews are available in plenty in literature and well documented. Ti-B-N, Ti-Si-B-C, Ti-Si-B-C-N, Si-C-N, Ti-Al-N, Ti-Al-Si-N, Al-Si-N, Ti-Cr-Al-N, Zr-Si-N and some other similar system nanocomposite hard coatings are important where the gradual and intelligent additions of different elements in hard single component phase provides the combination of hardness, toughness and low coefficient of friction. Some of these systems are discussed. In the end, the future directions of research, Technology„ which are required to achieve tough nanocomposite hard coatings for actual applications are also highlighted.

中文翻译：

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纳米复合硬质涂层的增韧

对于工程应用，必须在具有高接触负载的应用中兼顾硬度和高韧性。通过适当调整硬质纳米复合涂层中涂层的微观结构，可以实现硬度，韧性和低摩擦系数的良好组合。摩擦徽标应用需要具有针对不同应用的量身定制功能的硬涂层；硬质纳米复合涂料是此类应用的潜在材料。钛和无定形碳基体系已显示出更有希望的材料。本综述讨论了纳米复合硬涂层，韧性增强机理，多层硬纳米复合涂层。在这里，主要讨论了基于Ti和Si的纳米复合材料，因为基于碳的综述已有大量文献报道并有据可查。钛硼 Ti-Si-BC，Ti-Si-BCN，Si-CN，Ti-Al-N，Ti-Al-Si-N，Al-Si-N，Ti-Cr-Al-N，Zr-Si-N和其他一些类似体系的纳米复合硬涂层也很重要，因为在硬单组分相中逐步和智能地添加不同的元素可提供硬度，韧性和低摩擦系数的组合。讨论了其中一些系统。最后，重点介绍了在实际应用中获得坚固的纳米复合硬质涂层所需的技术研究的未来方向。韧性和低摩擦系数。讨论了其中一些系统。最后，重点介绍了在实际应用中获得坚固的纳米复合硬质涂层所需的技术研究的未来方向。韧性和低摩擦系数。讨论了其中一些系统。最后，重点介绍了在实际应用中获得坚固的纳米复合硬质涂层所需的技术研究的未来方向。