Using aluminum nitride ceramics instead oftraditional steel to make cars can reduce the weight of the whole vehicle byabout 30%. The mold is formed by molding a molten aluminum nitride ceramic of400 to 1600 ° C under high pressure (30 to 150 MPa). During the moldingprocess, the mold is periodically heated and cooled and is subjected to hotmetal spraying and corrosion by high-speed spraying. The mold material requireshigh thermal fatigue resistance, thermal conductivity and good wear resistance,corrosion resistance and high-temperature mechanical properties. It is stilldifficult to meet the ever-increasing performance requirements by simplyapplying the mold material. Therefore, various surface treatment technologiesmust be applied to the surface treatment of the die-casting mold to meet therequirements of high efficiency, high precision and long life of thedie-casting mold.
Aluminum nitride ceramics have sevencharacteristics, namely heat resistance, thermal shock resistance,self-lubrication, corrosion resistance, wear resistance, small specific gravityand high brittleness. In addition to the high brittleness, several otherfeatures make this material play a huge role in the aviation field. And thedisadvantage of large brittleness can also be solved by means of continuousfiber toughening.
Aluminum nitride ceramics is one of the mostdemanding high-tech materials in the aerospace industry. For example, theturbine engine of an aircraft has an internal temperature of 650 ° C or higherand requires a high alloy resistant material. The temperature in the combustionzone is higher, reaching above 1800 °C, where high-heat-resistant ceramicmaterials such as aluminum nitride ceramics are required.
The strength of aluminum nitride can reach250 MPa and the hardness can reach 9. It is precisely because of these featuresthat it is widely used in mechanical applications. In addition, its wearresistance is very good, so it is also used to make tools or grinding wheels.
Aluminum nitride ceramics can also be usedin medical manufacturing, such as making artificial bones, teeth, and etc.
It is stable in performance and has goodbiocompatibility, so it is the preferred material for making human bones. Inaddition, its hardness is very strong, and it is very wear-resistant, so it canbe used to make teeth. There are many artificial teeth on the market that aremade of aluminum nitride. Compared to other materials, it is cheap but durable.
Aluminum nitride ceramics can be used inthe electronics industry to make, substrates, ceramic films, insulatingceramics, and etc.
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