FeNico alloy describes a metallic alloy system consisting mainly of iron, nickel and cobalt. This alloy system includes Koval, fe-Ni-CO 1, FE-NI-Co 2 and Dumis.The name iron nickel cobalt alloy comes from the chemical symbols of its three constituent elements. The name Du Mei is a hybrid of the words' dual 'and' metal ', and because it is a heterogeneous alloy, it is usually made in the form of wire with an alloy core and copper cladding. These alloys have electrical conductivity, minimal oxidation, the ability to form porous surfaces at glass operating temperatures, and thermal expansion coefficients that closely match the glass. These characteristics enable the alloy to be used for glass sealing, such that the sealing joint will not rupture or leak with the change of temperature.
Dumas is most commonly used as a sealed lead-in to the glass cover of standard household electric lamps. Both Fe-Ni-Co alloys consist of iron (Fe), nickel (Ni), and cobalt (Co), and fe-Ni-Co alloys can be used at high temperatures (20-80℃), as is the case with Kavar. Fe-ni-co 2 is used in the low temperature range of -180 -- 80℃. Both are used to create conductive paths through the walls of sealed borosilicate glass containers. Dumet has a similar effect, but is specialized in sealing soda-calcium glass and lead-alkali silicate glass,
These alloys are attached to lead-tin, tin, and silver solders, and other metals including copper, molybdenum, nickel, and steel can be spot-welded to fe-Nickel-cobalt alloys to form a low-resistance electrical connection.
