Scientists have found that super-transparent aluminum has good bulletproof effect. The resulting material is quite expensive, so it is usually only suitable for high-performance applications, especially in the military field. January 31st, in the science fiction movie "Starship Trek IV: A magical super-strong material that appeared in “Rescue the Future†has now become a reality, and a transparent aluminum material invented by scientists seems to be very similar to this fantasy material. Although the scientists did not disclose the technical details of the development of transparent metal aluminum, but the super-transparent materials they developed have been verified to have better bulletproof effects. This material is called AION, which is a kind of aluminum oxynitride material, which is 4 times stronger than fused silica, 85% of sapphire, and can withstand a high temperature of 1200 degrees Celsius. At a thickness of 1.6 inches, this material can resist the impact of .50 caliber bullets, which can easily penetrate twice the thickness of ordinary safety glass. In the science fiction movie "Starship Trek IV: Rescue the Future", engineer Scuti once invented a transparent aluminum. In fact, human research on transparent aluminum began at least in 1981, so the writer of this 1986 film made the idea of ​​transparent aluminum public earlier. At least the transparent aluminum in the film has some similarities with AION. Today, this material can be mass-produced. The general method is to pour the aluminum oxynitride powder into a rubber mold to form the required rough model. Under the action of hydraulic pressure, the model is compressed to 15000psi until the powder becomes a green granule. Then, this granular structure was heated to 2000 degrees Celsius and lasted for several days. Although the melted material is opaque, it can appear optically transparent after mechanical polishing. The resulting material is quite expensive, so it is usually only suitable for high-performance applications, especially in the military field. The ALON brand materials produced by Sumter, Massachusetts, USA are mainly used for armored vehicle bulletproof windows, lenses for battlefield optical equipment, telescope domes, and transparent round windows covering the top of missile sensors.
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