Preparation Of Equimolar Ratio Cu-Fe-Ni Ternary Alloy By Thermol Diffusion Of Component Modulated Multilayer

The preparation process of ultra-light materials is: printing templates-chemical plating-removing templates-to obtain ultra-light materials.The characteristics of ultralight materials are that the material structure can be designed and the thickness can be controlled,but the material composition is limited by the formulation of the chemical plating solution,and it is impossible to prepare ultra-light materials with controllable compositions.Therefore,we propose a chemical plating-heat treatment method to solve this drawback.An electroless plating method is used to coat the modulation component multilayer film on the substrate to achieve the purpose of controlling the composition of the alloy,and then an ultra-light material composed of the alloy is prepared using a thermal diffusion method.In order to verify the feasibility of the method,it is proposed to prepare ternary alloys with equimolar ratio,Cu-Fe-Ni ternary alloys are selected as the verification materials for preparation,and the diffusion process is simulated and analyzed from the macro and micro scales.The diffusion process and simulated diffusion results are described.The experimental results show that it is feasible to prepare an equimolar ratio ternary alloy by electroless plating-heat treatment,and it provides an experimental method for the design and preparation of ultra-light materials that can be designed in structure,composition and thickness.(1)A method of electroless plating-heat treatment to prepare a specific alloy is proposed.That is to prepare a modulated multilayer film using an electroless plating method,and then perform a heat treatment to obtain a homogeneous alloy.The modulation process multilayer chemical coatings were prepared by experiments,and the plating speed of various pure metal coatings was calculated,which provided a strong argument for the preparation of ultra-light materials with designable composition.(2)Molecular dynamics simulation was conducted on the thermal diffusion process of multilayer metal.The diffusion behavior of equimolar ternary layered metal in thermal diffusion process was analyzed from the atomic scale,and the diffusion process was divided.Simulation experiments found that the layered metal undergoes interface amorphization during thermal diffusion.The amorphous region grows with the expansion of the diffusion region,and eventually loses the lattice structure in the entire simulation range and becomes an amorphous structure.(3)A macro simulation of the heat treatment process of the multilayer film was carried out,and the effects of the modulation period,the arrangement order of the components and the holding temperature on the diffusion time required to achieve a uniform composition were studied respectively.When the thickness is constant,the greater the modulation period,the shorter the time required for diffusion to reach uniformity;the different stacking order,the different diffusion time required,according to the arrangement of Fe-Ni-Cu,the shortest diffusion time required;as the temperature rises High,the shorter the time for the system to achieve a uniform composition,relative to the three elements currently selected,1250 K is the most suitable temperature for diffusion and heat preservation.