制造和加工业的迅猛发展以及日益苛刻的服役环境对刀具和模具材料提出了超硬、耐磨、耐热、寿命等复合要求，超硬金属氮化物纳米多层膜以满足上述要求的优良力学性能和可设计性使其作为最富前景的刀具涂层材料受到越来越多的关注与应用，超硬性能是其得到广泛应用的基础。对其致硬机理的研究清晰地表明"模板效应"起着至关重要的作用。本项目拟针对超硬金属氮化物纳米多层膜材料，采用理论(第一性原理、有限元分析)和实验相结合的方法研究纳米多层膜中"模板效应"的机理及失效形式，明确主要影响因素并定性分析各因素如晶格常数、弹性/剪切模量等影响系数，进而通过掺杂恰当的合金元素增加"临界厚度"，并建立性质改良的数据库，建立从纳观原子尺度到宏观有限元为基础的超硬纳米多层膜的特性分析方法，为其制备、力学性能的评价和预测提供理论支持。

The rapid development of manufacture and processing industry presents the multi-requirements for the tools and mould materials, such as extreme hardness, wear resistant, high thermal, tough and lifetime, etc. As for the most promising tool coatings, superhard-metal nitride-nano-multilayers are getting more and more concerns and applications because not only of the excellent mechanical properties which meet above needs but also of their designability. However, the extreme hardness is the fundamental property renders them applicable for extensive use. The research for the superhardness mechanism has clearly indicated that "Template Effect" plays a critical role. In the project, a research contained theory(First-principles and Finite Element Analysis) and experiment would be proposed for superhard-metal nitride-nano-multilayers to investigate the mechanism of "Template Effect" and failure mode. Furthermore, the main influencing factors should be deeply investigated, and some factors, such as lattice constants, elastic/shear modulus, and so on, should be qualitatively analyzed. Moreover, the database should be built for modifying the properties wherein the doping of suitable alloying elements could increase the "critical thickness". Finally, a analysis methodology, from atomistic scale to macro-finite element should be established to provide the theoretical support for the manufacture, evaluation and prediction for mechanical properties.