Special ceramic structural materials

    Special ceramic structural materials have become the material of choice for parts and components under severe conditions in recent years due to their excellent comprehensive mechanical properties and chemical stability. If it is very extreme conditions (such as multiple extreme conditions including ultra-high temperature in parallel), not all ceramic materials can meet the requirements of use-such as aerospace, military, nuclear industry, or civilian cutting tools , The requirements for high temperature resistance, wear resistance, corrosion resistance, and service life of ceramic materials will be greatly improved. At this time, among the materials that have more excellent high temperature performance and can meet such requirements, ultra-high temperature special ceramics have come into our field of vision.

    Among ultra-high temperature ceramic materials, carbides are a very important category, including titanium carbide (TiC), zirconium carbide (ZrC), hafnium carbide (HfC), tantalum carbide (TaC) and so on. They can be used to manufacture a variety of precision ceramic tools, precision ceramic parts, aerospace structural parts, and can also be used as matrix materials or additives in the original process chain in a wider range of cemented carbide and various cermets. Using-such as ZrC and TiC can effectively improve the overall performance of sintered products, including reducing friction coefficient, improving wear resistance, reducing sintering temperature, controlling the grain size of the finished product, and improving corrosion resistance.

     Regardless of the application form, one thing is certain-the performance of the product is closely related to the quality of the carbide powder. For example, Japan’s Kyocera has introduced several new types of cermet tools in the past ten years. The surface quality and service life of the processed products far exceed the traditional grades. Their excellent performance is due to the internal ultra-fine crystal structure, which is the prerequisite for the manufacture of ultra-fine crystals. The condition is to use ultrafine titanium carbonitride powder with good morphology and uniform particle size distribution as the main raw material.

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