Shape memory alloy hollow micro-lattice material and preparation method thereof

Abstract

The invention discloses a shape memory alloy hollow micro-lattice material and a preparation method thereof. The formula comprises an equal atomic ratio of NiTi alloy, and the weight percentage of the component is 100% of NiTi alloy. The preparation method comprises the following steps of: step 1, polymer mask processing; step 2, NiTi alloy film sputtering forming; step 3, hollow micro-lattice material obtaining; and step 4, NiTi alloy hollow micro-lattice material obtaining with a memory effect. The hollow micro-lattice material prepared by the preparation method disclosed by the invention is high in structural designability; the method for obtaining the shape memory alloy hollow micro-lattice material is simple, convenient and easy to implement, and the thickness of a film can be controlled by controlling the sputtering time, so that the regulation and control of the thickness of a tube wall between 50nm and 20 microns can be realized; the micro-lattice material prepared by the preparation method disclosed by the invention has the advantages of light weight, superelasticity, outstanding memory effect, high damping, energy absorption and biocompatibility; and compared with other deposition methods, the preparation method disclosed by the invention has the advantages of wide material selection and better film uniformity by using a magnetron sputtering technology.

Description

technical field [0001] The invention relates to the technical field of micro-lattice materials, in particular to a shape-memory alloy hollow micro-lattice material and a preparation method thereof. Background technique [0002] As the performance requirements of materials in aerospace, energy, chemical and biomedical fields are getting higher and higher, people pay more and more attention to low-density materials; micro-lattice materials have excellent mechanical properties and high Designability and extraordinary versatility; through the optimal design of the geometric configuration of the micro-lattice material unit structure, the multi-level sub-scale of the structural elements of the material can be adjusted to achieve the unity of low density and high strength of the material, and its elastic modulus The weight and strength are far superior to other ultra-light materials such as carbon nanotubes, graphene, metal foam and silicon aerogel with the same density. It breaks ...

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Problems solved by technology

[0002] As the performance requirements of materials in aerospace, energy, chemical and biomedical fields are getting higher and higher, people pay more and more attention to low-density materials; micro-lattice materials have excellent mechanical properties and high Designability and extraordinary versatility; through the optimal design of the geometric configuration of the micro-lattice material unit structure, the multi-level sub-scale of the structural elements of the material can be adjusted to achieve the unity of low density and high strength of the material, and its elastic modulus The weight and strength are far superior to other ultra-light materials such as carbon nanotubes, graphene, metal foam and silicon aerogel with the same density. It breaks through the performance limitations of disordered structures and is a promising future Structurally efficient materials; NiTi shape memory alloy materials are attracting more and more attention because of their excellent superelasticity, recoverability and biocompatibility; porous NiTi shape memory alloys are good energy absorbing materials, compared to solid point The hollow lattice material has the characteristics of light weight, high specific strength, and high specific energy absorption; using NiTi shape memory alloy material as the matrix material of the hollow lattice material can obtain a more lightweight, structure-function integrated Micro-lattice materials; therefore, there are certain requirements for some NiTi shape-memory alloy hollow micro-lattice materials and their preparation methods in the market; however, there is no NiTi material with strong designability, simple and easy preparation method. Shape memory alloy hollow micro-lattice material; therefore, it is very necessary to invent a shape memory alloy hollow micro-lattice material and its preparation method at this stage

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