Solid state chemistry Jewelery metals
What cheap metal alloys are most common in jewelery and what properties gives them this popularity?
In fact, silver and gold products are also alloys, since the sample is actually the percentage of the main substance on them.
@argentum Yeah, heard about it. If the ring, for example, would be made from pure gold you can easily band it just by hitting on something
But I was interested in cheap but unique in some way alternatives
@chaoticgood it is unlikely to knit, but scratches and indentations., easily, besides, it was erased quickly
The composition of gold alloys as alloying components may include: silver, copper, palladium, nickel, platinum, cadmium and zinc. Each of the components in its own way affects the properties of the alloy. Silver gives the gold alloy softness, malleability, slightly lowers the melting point of the jewelry alloy. As silver is added, the color of the jewelry alloy turns green, turning into yellow-green; at a silver content of more than 30%, the color becomes yellow-white and pales as the amount of silver increases; when the alloy contains 65% silver, the color of the alloy becomes white (such an alloy cannot be called a white gold alloy). Copper increases the hardness of the gold alloy, while maintaining its malleability and malleability. The alloy takes on a reddish hue that intensifies as the percentage of copper increases; at a content of 14.6% copper, the alloy becomes bright red. However, copper reduces the anti-corrosion properties of the alloy. Palladium raises the melting point of the gold alloy and dramatically changes its color - with a content of 10% palladium in the alloy, the ingot turns white. Plasticity and ductility of the alloy are preserved. Nickel, changes the color of the alloy to pale yellow and increases the hardness. The nickel content improves the casting quality of the jewelry alloy. Platinum colors the gold alloy whiter than palladium. The yellowness is already lost at a content of 8.4% platinum in the alloy. The melting point of the alloy rises sharply. With an increase in the content of platinum to 20%, the elasticity of the alloy increases. Cadmium in the composition of the alloy sharply lowers the melting point, but retains the ductility and ductility of the alloy. Zinc lowers the melting point of the alloy and increases its fluidity. With a high zinc content, the alloy becomes brittle.
@argentum this is really very interesting! I've never heard about gold alloys with copper and zinc in jewelery
what is actually "white gold"? is it a specific alloy?
By the way, I've seen beautiful titanium jewelry. It's known that it is very durable, but at the same time quite light
@marie-curie White gold is a jewelry material, an alloy of gold with other components (such as silver, palladium or nickel), which color it white.
@marie-curie Titanium is a very useful metal, besides it is biocompatible, so implants are made from it.
Titanium powder is used in pyrotechnics, as a sparking agent as well.
@marie-curie Probably a great material for piercing and over extreme jewelry