Novel composite ceramic with high thermal shock resistance and processing process thereof

Abstract

The invention discloses a novel composite ceramic with high thermal shock resistance and a processing process thereof. The composite ceramic is prepared from the following components of magnesium powder, silicon powder, carbon powder, aluminosilicate mineral and a binder. The processing process includes the following steps of preparing of a first mixture; preparing of a pre-sintered material; preparing of a perform body; preparing of a biscuit; and sintering of the biscuit by discharge plasma to obtain the novel composite ceramic. According to the novel composite ceramic, the atomic level mixing between the magnesium powder and the aluminosilicate mineral is achieved, a highly disordered crystal structure is formed, and the carbon powder and the silicon powder generate silicon carbide whiskers in situ which are uniformly distributed among the highly disordered crystal structure formed by the magnesium powder and the aluminosilicate mineral, so that the problems of agglomeration and uneven distribution caused by directly adding silicon carbide whiskers are solved, and the performance of the composite ceramic is greatly improved. According the experimental result, the novel compositeceramic has good thermal shock resistance and bending resistance.

Description

technical field [0001] The invention relates to the technical field of composite ceramics, in particular to a novel composite ceramic with high thermal shock resistance and a processing technology thereof. Background technique [0002] Ceramics is an important part of Chinese civilization. As one of the four ancient civilizations, China has made outstanding contributions to the progress and development of human society. Among them, the invention and development of ceramics has unique significance. Various dynasties in Chinese history Each generation has a different artistic style and different technical characteristics. With the development of modern science and technology, many new ceramic varieties have emerged in the past century. They no longer use or rarely use traditional ceramic materials such as clay, feldspar, and quartz, but use other special materials, and even expand to non- Silicates, non-oxides range, and many new processes have emerged. The literature of the...

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Problems solved by technology

The literature of the United States and some European countries has understood the term "Ceramic" as a general term for various inorganic non-metallic solid materials, so the meaning of ceramics has actually far surpassed the narrow traditional concept in the past. With the continuous development of science and technology , higher requirements are put forward for the performance of ceramic materials. Traditional ceramic materials cannot meet modern requirements. High-performance ceramics and ceramic matrix composite materials have become the focus of research in various countries.

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