What's in optimal defects of ceramic bearing? With the metal bearing in which good?

In life we can not do without some mechanical equipment, because it is a local in our life. Bearing is the warp and woof of mechanical machine and so on is an important component, but bearing is also has a lot of material, different material is suitable for the mechanical equipment can have certain difference, ceramic bearing perhaps everyone don't understand, what are the optimal defects of ceramic bearing? Presumably with the metal bearing, ceramic bearing or metal bearing good after all? The following to explanation for everyone. Ceramic bearing of ceramic bearing defect: ceramic bearing atomic structure, inherent covalent bond, not of metal. This means that they share electrons, the atom has a intense adsorbability, for this reason, ceramic bearing provides some good performance than metal bearings. They usually have high hardness, elastic, and lighter. This means that changes in shape, load application together with progress wear-resisting properties. Ceramic bearings running smooth. This is due to the ceramic materials not micro welding. Micro welding occurs, usually with metal, when the rolling element and raceway appearance defects with another provoked arc interact on each other. This reduces appearance and greatly reduce the service life of bearing. Ceramic materials do not have such problem, which makes them suitable to demand a comfortable and smooth oil environment of a variety of applications. They usually at high temperatures which means there is less hot shrink at a steady way. It needs a lot more energy, in order to add a covalent bond length, compared to metal ionic bonding. Ceramic is a nonmetal, non-ferrous materials. When exposed to water and other harmful chemicals are not in the same way as the metal corrosion. Their high corrosion resistance to allow their excellent performance in the wet and chemical corrosion environment. Many engineering ceramics also has low density, incurred in bearing & # 39 working speed, this is improved due to the low centripetal force and reduce friction. Due to the lack in most comfortable electronic ceramics, they are magnetic and good insulators. Ceramic bearing, when people may notice that the first thing is that they fundamentally more expensive than metal. There are many reasons. Have to reach the temperature of the high-grade raw material by sintering process needs a large amount of energy that is required by the high energy and processing. Since ceramic is so hard, machining and grinding fine bearing manufactured capital of rapid increase. All of this required in a clean environment has the skilled labor to complete. Ceramic is incredibly sensitive in their pore impurities, so any pollutants may cause premature failure. With the increase of the size, the price has increased the index, due to their high capital, processing method of the request. These include, to control the temperature gradients in the green, the amount of pressure on the average in the general product and the sintering process of machine slower capital requirements. Ceramic bearing has low load can be compared to metal and is sensitive to thermal shock. Thermal shock is when the temperature gradient inside the material will cause different contraction, this will cause internal stress. This pressure can transcend such data form the strength of the crack. Ceramic is also more difficult to complete high quality appearance of the brightness. It is able to grind them into 0 radium. 1 the appearance of brightness, which allows complete a P5 precision grade. But, due to the recent technical progress, precision ceramic bearing higher class is now able to carter. In general are nine network hardware encoding thought optimal defects of ceramic bearing can boil down the following points: ceramic bearing advantages: can be used for high temperature, insulation, corrosion resistance, no smooth place. Ceramic bearing defect: machining difficult, capital is high. Ceramic bearing or metal bearing good? 1, the full ceramic bearing fatigue life of 10 to 50 times longer than the whole of the steel bearing one, hybrid ceramic bearing, life will be 3 - higher than all steel bearing's life About five times; Use life, ceramic bearing is much higher than the metal bearing. 2, ceramic bearing low friction coefficient, smooth ceramic bearing, so the oil in the smooth oil is thinning or short situation, its smooth can still not less than the traditional smooth steel bearings commonly used agent; 3, ceramic bearing rigidity than metal bearing, ceramic materials of high elastic modulus, the rigid steel bearing 15 - larger than normal 20%. 4, compared with the metal bearing, ceramic bearing corrosion wear. Because itself its own data, so the direct cause of the ceramic bearing corrosion resistance and abrasion resistance than metal bearing more and more good.