高熵效应下高熵非晶与高熵合金纳米薄膜自蔓延反应连接接头形成机理及控制机制研究

This project puts forward a method, self-propagating reactions in nano-foils method, to join the high-entropy amorphous alloy and high-entropy alloy, and to study the formation and control mechanism for reaction joint of high-entropy amorphous alloy with amorphous state and high-entropy alloy with BCC and (or) FCC crystalline state under high-entropy effect. Through unfolding the design principles, reaction process and joining natures of nano-foils, the kinetics of self-propagating reaction process will be systematically studied. The impact and control mechanism of process parameters on the microstructures of joint will be clarified using molecular dynamics simulations and thermodynamics. The influence law of temperature field evolution on the phases and microstructures of high-entropy amorphous | nano-foil | high-entropy alloy interfaces will be investigated using numerical simulation and molecular dynamics simulations. The influence and inhibition mechanism of process parameters on the detrimental phases and intermetallic compounds of joint and its interfaces will be unfolded. The control mechanism of process parameters on various microstructure configuration joint will be illustrated. The influence mechanism of high-entropy effect on different microstructure configuration joint will be uncovered. Finally, the joining mechanism between high-entropy amorphous and high-entropy alloy via self-propagating reactions in nano-foils method will be revealed, and ideal microstructure and properties of the joint will be obtained. This project plans to explore high efficient joining method for high-entropy amorphous and high-entropy alloy. Simultaneously, the self-propagating reactions in nano-foils method will be expanded in to the joining of the two new materials of high-entropy amorphous and high-entropy alloy. The development of the joining technology for the two new materials will be promoted.

本项目针对高熵非晶和高熵合金材料的连接，提出采用纳米薄膜自蔓延反应连接方法，研究高熵效应下高熵非晶与BCC或(和)FCC晶态高熵合金反应连接接头形成机理及控制机制。从纳米薄膜设计原则、反应动力学过程及连接本质入手，深入研究自蔓延反应的动力学过程；借助分子模拟及热力学揭示工艺参数对接头显微组织影响机理及控制机制；采用数值模拟结合分子模拟方法阐明温度场演化对高熵非晶|纳米薄膜|高熵合金两个界面物相及显微组织影响规律；考察工艺参数对反应接头及其界面有害相和金属间化合物形成影响机理及抑制机制；研究获得不同显微构型接头的工艺参量控制机制，解明高熵效应对不同显微构型接头形成影响机理；最终阐明纳米薄膜自蔓延反应连接高熵非晶和高熵合金材料连接机理，实现对接头组织及性能的良好控制。本项目旨在为高熵非晶和高熵合金的连接探索高效连接方法，将自蔓延反应拓展到这两种新型材料研究中，促进两者连接技术的发展。

本项目针对高熵非晶和高熵合金材料的连接，提出采用纳米薄膜自蔓延反应连接方法，研究高熵效应下高熵非晶与BCC或(和)FCC晶态高熵合金反应连接接头形成机理及控制机制。从纳米薄膜设计原则、反应动力学过程及连接本质入手，深入研究了自蔓延反应的动力学过程；借助分子模拟及热力学揭示工艺参数对接头显微组织影响机理及控制机制；采用数值模拟结合分子模拟方法阐明温度场演化对高熵非晶|纳米薄膜|高熵合金两个界面物相及显微组织影响规律；考察工艺参数对反应接头及其界面有害相和金属间化合物形成影响机理及抑制机制；研究获得不同显微构型接头的工艺参量控制机制，解明高熵效应对不同显微构型接头形成影响机理；最终阐明纳米薄膜自蔓延反应连接高熵非晶和高熵合金材料连接机理，实现对接头组织及性能的良好控制。本项目旨在为高熵非晶和高熵合金的连接探索高效连接方法，将自蔓延反应拓展到这两种新型材料研究中，促进两者连接技术的发展。