Research Status and Prospects of Thermal Bimetallic Materials
Thermal bimetallic composite material is a material formed by using advanced composite technology to combine two or more metals with different thermal expansion.This composite material combines the physical properties of different metals and exhibits a characteristic of changing shape with temperature variation,hence it finds extensive applications in the field of electronics and electronic appliances.With the rapid development of science and technology,the demand for the quality of thermal bimetallic products is increasing,making research and development in this field of significant importance.This paper reviews the principles,characteristics,compositions,main performance indicators and manufacturing technologies of thermal bimetallic materials.Firstly,the principles and characteristics of thermal bimetallic materials are at the core of research.These materials are formed by alternating layers of two or more metals,tightly bonded through composite technology.Due to the different coefficients of thermal expansion of various metals,the material undergoes shape changes when subjected to thermal stimuli.Secondly,the composition of thermal bimetals is an important factor affecting their performance.Choosing the appropriate metal combination can result in superior performance of composite materials.Common compositions include steel-aluminum,copper-aluminum,etc.By designing the thickness ratio and stacking sequence of different metals reasonably,the thermal expansion performance and mechanical strength of the material can be controlled.The main performance indicators include the coefficient of thermal expansion,electrical conductivity,mechanical strength,etc.The coefficient of thermal expansion determines the extent of shape change of the material with temperature variation,electrical conductivity affects the electrical performance of the material in electronic devices,and mechanical strength directly relates to the material's lifespan and stability.Manufacturing technology is one of the key factors affecting the quality of thermal bimetallic composite materials.Common manufacturing techniques include explosive bonding,roll bonding,powder metallurgy,etc.Different manufacturing techniques affect the degree of material bonding,microstructure,and performance stability,thus specific application scenarios and requirements need to be considered when choosing manufacturing techniques.Finally,this paper discusses the main future development directions of thermal bimetals.
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NSTL
万方数据
维普
