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The bonding between the glass or ceramics and the glass solder can be either covalent, or, more often, van der Waals. [12] The seal can be leak-tight; glass soldering is frequently used in vacuum technology. Glass solders can be also used as sealants; a vitreous enamel coating on iron lowered its permeability to hydrogen 10 times. [13]
Brazing and soldering processes classification chart [7] A US Navy maintenance technician torch brazes a steel pipe There are many heating methods available to accomplish brazing operations. The most important factor in choosing a heating method is achieving efficient transfer of heat throughout the joint and doing so within the heat capacity ...
Uranium glass used as lead-in seals in a vacuum capacitor. Glass-to-metal seals are a type of mechanical seal which joins glass and metal surfaces. They are very important elements in the construction of vacuum tubes, electric discharge tubes, incandescent light bulbs, glass-encapsulated semiconductor diodes, reed switches, glass windows in metal cases, and metal or ceramic packages of ...
The term can describe the result of some food preservation practices, such as vacuum packing and canning. Packaging materials include glass, aluminum cans, metal foils, and gas-impermeable plastics. Some buildings designed with sustainable architecture principles may use airtight technologies to conserve energy.
The white opaque "glue" between the panel and the funnel of a colour TV cathode ray tube is a devitrified solder glass based on the system PbO – ZnO – B 2 O 3.While this is a glass-ceramic-to-glass seal, the basic patent of S.A. Claypoole considers glass-ceramic-to-metal seals as well.
Attachments can be made vertically, horizontally or even overhead. If preferred, threaded pins with nuts can be attached or cable bonded directly onto the pipe by means of a special cable lug which can be crimped on site or supplied complete as a unique integrally crimped attachment. The pin brazing unit contains all the equipment and tools ...
High-temperature. Brazing temperature 1400 °C. Can be used for brazing molybdenum. 91.5: 8.5: Ti 70 V 30 [5] – High-temperature. Brazing temperature 1650 °C. Can be used for brazing molybdenum. 70: V 30: V 65 Nb 35 [5] – High-temperature. Brazing temperature 1870 °C. Can be used for brazing molybdenum. V 65 Nb 35: Nb 97.8 B 2.2 [5 ...
An amorphous brazing foil (ABF) is a form of eutectic amorphous metal that serves as a filler metal in brazing operations. ABFs are composed of various transition metals (including nickel, iron, and copper) blended with metalloids like silicon, boron, and phosphorus.