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Research and Development of New Ceramic Composites in Russia

2019-08-27 16:32:48 7

On August 7, the reporter learned that the Russian National Research University of Technology (Moscow National Institute of Iron and Steel and Alloy), together with researchers from South Ural National University and Belarus National Academy of Sciences, had invented a composite material with ceramic characteristics, which had broad application prospects in the manufacture of information preservation devices and sensors. 。

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The composite material can control both the magnetic field and the electric field at the same time. It can also maintain its own properties at much higher temperature than room temperature. It helps to process information faster, protect storage better and avoid large amounts of data being stolen. With this material, new memory carriers, sensors, induction control devices and other more precise, reliable and non-charging microelectronic devices can be manufactured.

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It is known that composite materials usually have good comprehensive properties with different materials to complement each other. Composite materials have two or more characteristics, which can improve the properties of a single material, such as increasing strength, toughness and dielectric properties. Ceramic composites used as high temperature structural materials are mainly used in aerospace, military and other sectors. In addition, ceramic composites are widely used in mechanical, chemical, electronic technology and other fields.

Ceramic matrix composites (CMCs) are composites based on ceramics and various fibers. The ceramic matrix can be high temperature structural ceramics such as silicon nitride and silicon carbide. These advanced ceramics have excellent properties such as high temperature resistance, high strength and stiffness, light relative weight, corrosion resistance, etc. Their fatal weakness is brittleness. When they are in stress state, cracks will occur, and even fracture will lead to material failure. It is an effective method to improve the toughness and reliability of ceramics by using high strength and high elasticity fibers to compound with matrix. Fiber can prevent the crack from spreading, so that fiber reinforced ceramic matrix composites with excellent toughness can be obtained. Ceramic matrix composites have excellent high temperature resistance and are mainly used as high temperature and wear resistant products. Its maximum service temperature mainly depends on the characteristics of the matrix.


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