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Typical vacuum levels for brazing range from pressures of 1.3 to 0.13 pascals (10 −2 to 10 −3 Torr) to 0.00013 Pa (10 −6 Torr) or lower. [11] Vacuum furnaces are most commonly batch-type, and they are suited to medium and high production volumes.
Brazing has the advantage of producing less thermal stresses than welding, and brazed assemblies tend to be more ductile than weldments because alloying elements can not segregate and precipitate. Brazing techniques include, flame brazing, resistance brazing, furnace brazing, diffusion brazing, inductive brazing and vacuum brazing.
High-temperature strength. Free-flowing. For carbides, stainless steels, tool steels, and nickel alloys. Excellent wetting of carbides, stainless steel and copper. Good gap-filling at lower brazing temperatures. Fluxless brazing possible in vacuum or suitable atmosphere. Brazing often done together with heat treatment. 87: 10: 2: Cu 87.75 Ge 12 ...
Induction brazing is a process in which two or more materials are joined together by a filler metal that has a lower melting point than the base materials using induction heating. In induction heating, usually ferrous materials are heated rapidly from the electromagnetic field that is created by the alternating current from an induction coil .
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 ...
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A better choice for vacuum systems is the tin-silver eutectic, Sn95Ag5 (Sn-Ag eutectic is actually 96.5-3.5); its melting point of 230 °C (446 °F) allows bakeout up to 200 °C (392 °F). A similar 95-5 alloy, Sn95Sb5, is unsuitable as antimony has similar vapor pressure as lead. Take care to remove flux residues.
From the IS4S Salute to Veterans Bowl on Dec. 14 to the College Football Playoff National Championship Game on Jan. 20, 82 teams will play in at least one postseason game.
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