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Jewelry wire is wire, usually copper, brass, nickel, aluminium, silver, or gold, used in jewelry making. Wire is defined today as a single, usually cylindrical, elongated strand of drawn metal . However, when wire was first invented over 2,000 years BC, it was made from gold nuggets pounded into flat sheets, which were then cut into strips.
More recently, aluminium yarns, aluminized plastic yarns, and aluminized nylon yarns have replaced gold and silver. Today's metal fiber industry mainly offers fibers in stainless steel, nickel, titanium, copper and aluminium for various applications. [2] Metallic filaments can be coated with transparent films to minimize tarnishing.
Glass-coated microwires successfully produced by this method include copper, silver, gold, iron, platinum, and various alloy compositions. It has even proved possible to produce amorphous metal ("glassy metal") cores because the cooling rate achievable by this process can be of the order of 1,000,000 kelvins per second. Glass-coated wire ...
A very important advance in glass manufacture was the technique of adding lead oxide to the molten glass; this improved the appearance of the glass and made it easier to melt using sea-coal as a furnace fuel. This technique also increased the "working period" of the glass, making it easier to manipulate.
Copper wire can be hammered quite thin. Brass wire is a little stiffer than copper, but it can be manipulated very easily. Sterling silver is soft enough to manipulate, but holds its shape well once it has been formed. Gold-filled wire is made by fusing a layer of 12-or 14-karat gold to a supporting material. Silver-filled wire is made in the ...
The first reported metallic glass was Au 75 Si 25, produced at Caltech by Klement, Willens, and Duwez in 1960. [5] This and other early glass-forming alloys had to be rapidly cooled (on the order of one mega kelvin per second, 10 6 K/s) to avoid crystallization. An important consequence of this was that metallic glasses could be produced in a ...
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The name is mostly applied informally to compositions between 20–80% gold and 80–20% silver, but these are strictly called gold or silver depending on the dominant element. Analysis of the composition of electrum in ancient Greek coinage dating from about 600 BC shows that the gold content was about 55.5% in the coinage issued by Phocaea .