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Vacuum Metalizing: An Overview

The vacuum Metallization is the way to evaporate metals, especially the aluminum inside a vacuum chamber which then joins a substrate to realize a uniform metallized layer. This process is also referred to as thermal vaporization and the most common PVD (Physical Vapor Deposition) process used to apply metallic composites under vacuum. Vacuum metallization has many uses, including; EMI / RFI guards, decorative chrome and metallic finishes, high reflective coatings for headlamps, thermal shields and evaporation barriers.

Vacuum Metallization Procedure
During the process, the physical vapor deposition combines metal with nonmetallic substrate through evaporation. The most commonly used metal in this process is aluminum because of various purposes such as cost, reflective and thermodynamic properties. Evaporation occurs by passing aluminum in heated boats or sources that are heated to about 1500 ? C (2700 ? F). The atmosphere in the vacuum metal chamber is purified to a vacuum level sufficient to evaporate the aluminum wire. Upon contact with the treated substrate, the aluminum steam condenses to form a uniform layer of aluminum.

Vacuum Metalization for Esthetics
Metalization is carried out for different purposes; Aesthetically creates a unique look. The metalized substrate has a highly reflective mirror to coat different goods and is sometimes used with other processes such as lamination or coating to form a decorative effect. The film which is taken through vacuum metallization can be coated and / or dyed to give the substrate a special color. Moreover, any vacuum-injected metal film can be laminated to other different substrates, such as synthetic fabrics and leather, to give this material a special, high-quality appearance.
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Vacuum Metalization for Insulation Usage
Metalization is mainly used to build the usability of the substrate. Vacuum metallized surface is good for insulation, mostly due to increased radiation / reflection properties. Local and commercial radial barrier insulators are a prerequisite for the effectiveness of the vacuum insulation process. Therefore, thermal insulation systems that are used to protect spaceships are constructed of different vacuum layers with metallized polyimide films.
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Adding barrier features with Vacuum Metalization
Another possibility obtained from the vacuum metallization process is extended edge properties. Metallization of plastic substrates makes in an extraordinary barrier of air and moisture. Its applications include medical and food & beverage applications. Transmission of light is controlled by an aluminum center embedded in a vacuum. The second term that is used instead of vacuum metallization is vacuum coating.

Vacuum metallization involves heating the coated metal to the boiling point in the vacuum chamber before allowing condensation to deposit such metal on the surface of the substrate. Electron beam, resistance heating or plasma heating is used in the vaporization of the metal coating. Another example in which vacuum maturation has been applied is to deposit the aluminum into huge glass mirrors, such as reflecting telescopes.