Carbonide ceramics have high hardness, high strength and high wear resistance, so widely used in corrosion resistance, wear resistant high temperature environment, common silicon carbide, boron carbide and other high wear resistant ceramics.
The first one is the use of silicon carbide materials. Silicon carbide ceramics are widely used in national defense, machinery, metallurgy, electronics and other industrial fields. Among many ceramic materials, silicon carbide has always been a hot topic of material science research due to its high hardness, high temperature resistance, good thermal stability, low thermal expansion coefficient and excellent thermal conduction properties. Compared with silicon carbide is applied to sand mill grinding cylinder, at least has several advantages of fast heat dissipation, low cost, more wear resistance and so on. The advantage of fast heat dissipation can prevent materials from reuniting due to high temperature, so as to improve the grinding efficiency. In terms of wear resistance, silicon carbide has excellent performance, but it also has the disadvantages of insufficient toughness, easy to break, and it is quite difficult to make a large bucket.
The second is the use of boron carbide materials. Thermopressed boron carbide, a non-metallic refractory compound, is one of the hardest substances in artificial abrasive, hot pressed products have a high wear resistance, gray black luster. Boron carbide ceramics have good wear resistance, so it has important applications in the field of wear resistance. The nozzle made of boron carbide ceramics has a long service life under harsh conditions, much higher than the nozzle made of alumina, tungsten carbide and other materials. In the powder engineering unit operation, with centrifugal spray dryer for ceramic powder, with small pollution, fast drying speed, uniform water content, narrow particle size distribution, powder fluidity and good advantages, but many ceramic powder hardness is higher, the high speed rotating centrifugal nozzle wear seriously, the use of boron carbon can effectively improve the service life of the nozzle.
The third type is the use of a silicon nitride material. Silicon nitride ceramics have a small proportion, low thermal expansion coefficient, good thermal impact resistance, high fracture toughness, and have a wide range of uses in aerospace, automobile launch, machinery, chemical industry and other fields, especially as a new high-temperature structural material is obvious advantages. In the field of powder engineering, the density of the silicon nitride airflow mill grading wheel is 3.2g / m, and its own body weight is 2 / 3 of the metal material. The biggest use feature of silicon nitride grading wheel is to prevent metal pollution. In addition, the proportion is 40% smaller than zirconia ceramics, which can not only greatly reduce the motor energy consumption, but also small motor requirements, under the existing motor can achieve overclocking, in order to get thinner particle size particles. Silicon nitride as a new type of grinding in industrial applications, with very low wear rate and excellent mechanical properties, much attention, although limited by the cost and processing level of silicon nitride, silicon nitride application is not widely used, and silicon nitride is small is not conducive to efficient grinding, but the use of grinding medium of low wear requirements, silicon nitride is a and its potential grinding material.
The fourth type is the use of aluminum nitride materials. Aluminum nitride ceramics have high hardness and high temperature strength properties, which can be used as cutting tools, grinding wheel and drawing mold, as well as manufacturing tool materials, metal ceramic materials. Also has excellent wear resistance performance, can be used as a wear-resistant parts。