Metal Roofing Panel Profiles.Basic knowledge of material mechanics

Metal Roofing Panel Profiles.Basic knowledge of material mechanics. Metal matrix composite is a new type of material made by adding inorganic non-metallic (or metal) reinforcements of different sizes and shapes (including fibers, whiskers, particles, nanoparticles, etc.) to the metal matrix by artificial method.

Through reasonable design, metal matrix composites can give full play to the respective performance advantages of reinforcement and matrix, and obtain special properties that "alloy" materials do not have, such as specific strength, specific stiffness, low expansion, high thermal conductivity, high temperature resistance and so on. however, there are some losses in plasticity and other indexes. The National Aeronautics and Space Administration (NASA) first developed metal matrix composites in 1963. Interfacial reaction control and preparation process are the key technologies of metal matrix composites.

With the improvement of the new generation of equipment technology, the performance requirements of basic materials are becoming more and more stringent. Under the condition that traditional metal materials can not meet the requirements, metal matrix composites have become irreplaceable strategic new materials, and their application breadth, development speed and production scale have become one of the important indicators to measure the level of material science and technology in a country. At present, the global market of metal matrix composites is basically monopolized by western developed countries, and metal matrix composites with a total mass of more than 2 beat 3 are used in the United States, Europe, Japan and other developed countries or regions.

China started the research of metal matrix composites in 1981, which has experienced a difficult initial stage and the initial stage of engineering verification, and now it has entered the stage of popularization and rapid development. The successful application of several kinds of metal matrix composites in the field of cutting-edge national defense has not only significantly improved the accuracy and efficiency of major equipment, but also provided a solid guarantee for equipment upgrading and technological upgrading. With the implementation of the integrated development of national military and civil technology, the metal matrix composite industry is facing an "important strategic opportunity period". Metal matrix composites are expected to be expanded and widely used in the field of livelihood equipment in the next 5 to 10 years. Under the new industrial situation, in view of the rapid growth of the dual-use market, this paper analyzes the shortcomings of metal matrix composite technology and its industrial environment, and discusses the measures to coordinate and solve the development speed and quality. Related research is particularly urgent.

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According to the global market report in 2014, metal matrix composites have a broad application prospect in spacecraft structure, electronic packaging and thermal management, automobile and rail transit vehicle brake discs and other industrial directions; it is expected that in 2012 and 2019, the global demand for metal matrix composites will increase from 5496 t to nearly 8000 t a, the output of materials will show a linear growth trend, and annual sales will increase from US $230 million to nearly US $400 million. In 2019, the U.S. Navy's ManTech program focused on six major technology areas: processing and manufacturing of composite materials, electronic processing and manufacturing, automated tools, welding and repair, equipment and industrial production, and defect testing, with a total investment of $2514 [4]. Gold.

The representative industrial applications of matrix composites are shown in Table 1