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High-temperature. Narrow melting range. Excellent wettability of ceramics; penetrates and seals surface pores and cracks, increasing fracture toughness. 54: 25: V 21: Ti 91.5 Si 8.5 [5] – 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 ...
At high temperatures can react with some metals, e.g. certain steels, forming nitrides. For copper, silver, nickel, copper-phosphorus and copper-zinc filler metals. For copper, silver, nickel, copper-phosphorus and copper-zinc filler metals.
Brazing provides the strongest of the non-welded joints but also requires the hottest temperatures to melt the filler metal, requiring a torch or other high temperature source and darkened goggles to protect the eyes from the bright light produced by the white-hot work. It is often used to repair cast-iron objects, wrought-iron furniture, etc.
In high-temperature metal joining processes (welding, brazing and soldering), fluxes are nearly inert at room temperature, but become strongly reducing at elevated temperatures, preventing oxidation of the base and filler materials.
Filler alloys have a lower melting point than the base metal, so that the joint may be made by bringing the whole assembly up to temperature without everything melting as one. Complex joints, typically for jewelry or live steam boilermaking, may be made in stages, with filler metals of progressively lower melting points used in turn.
Tungsten is often used in high temperature applications as well as for filaments in electron/ion optics. It becomes brittle from work hardening when mechanically deformed, or subjected to very high temperatures. Molybdenum and tantalum are useful for high temperature applications. [3] Titanium and niobium are good materials.
KappTec General purpose solder that will join all solderable metals except aluminium. High temperature, high strength solder. It is used in applications where alloys melting higher than soft solders are required, but the cost and strength of silver-brazing alloys is not necessary. [31] Cd 78 Zn 17 Ag 5: 249: 316 [32] Cd: No
Re is a slow diffuser and typically partitions the γ matrix, decreasing the rate of diffusion (and thereby high temperature creep) and improving high temperature performance and increasing service temperatures by 30 °C and 60 °C in second and third generation superalloys, respectively. [32]
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