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36 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Alloys |
It means "to bind to" |
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Alloys |
Is a material that contains more than one element and has the characteristic properties of a metal |
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Alloys |
Is usually made up mostly of metals, but may contain other types of elements |
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Alloys |
Its PURPOSE is to increase the hardness, lower the melting point and conductivity or modify the properties of the separate metals |
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Copper |
A type of element that is prone to oxidation making its surface turn a dull, pale-greenish color |
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To prevent oxidation and increase its strength |
Why did manufacturers fuse copper with a number of different elements? |
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Brass |
Is an alloy of Copper and Zinc |
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Brass |
Has a color of dark reddish to a light silvery yellow |
The more zinc, the lighter color |
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Brass |
It is stronger and harder than copper and doesn't corrode much in salt water, conducts heat very well and can be moulded into a variety of shapes |
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Brass |
It is USED to make tubings, pipe fittings, plumbing fixtures and valves |
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Bronze |
Is an alloy of 90% Copper and Tin, Lead, Nickel, Zinc, Phosphorus, Manganese, Iron |
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Bronze |
It is harder, stronger in comoression, and more resistant to corrosion than brasses |
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Bronze |
It is USED to manufacter medals, coins, and other decorative items |
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Gold Alloys |
Is a type of alloy that is often used in jewellery |
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Karat |
Is a term used to express the purity of gold |
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24 Karat |
How many karat is a pure gold? |
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10 Karat & 18 Karat |
It is alloyed with other metals (Ni, Cu, Ag, Ti) |
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Gold Alloys |
They harden it, make it stroger & fusible, & modify its color |
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Electrum |
-It is an alloy gold and silver with trace amount of copper and other metals -It a good conductor of electricity -COLOR: yellow / yellowish-white |
Au: 75% or 73% Ag: 25% or 27% |
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Tumbaga |
-It is an alloy of gold and copper -Has a low melting point than gold or copper alone -Harder than copper, but maintains malleability after being pounded |
e.g. Rose Gold |
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Rose Gold |
Also called pink gold, red gold, & russian gold |
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White Gold |
-It is an alloy of gold and one white metal (Nickel, Manganese, Palladium) -Its properties vary depending on the metals and proportions used |
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Nickel-Gold |
Is a type of white gold that is hard and strong |
Good for rings and pins |
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Gold-Palladium |
Is a type of white gold that is soft and pliable |
Good for white gold gemstone setting |
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Palladium & Nickel |
Primary bleaching agent for gold |
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Zinc |
-Secondary bleaching agent for gold -Used to attenuate the color of copper |
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Span Gold |
Is an alloy of gold, copper & aluminum that form a fine surface texture at heat treatment, yielding an interesting spangling effect |
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Yellow |
A volor of span gold that has a 76% Au, 19% Cu, 5% Al |
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Pink |
A color of span gold that has a 76% Au, 18% Cu, 6% Al |
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Grey Gold |
Alloys are made by adding Silver, Manganese, & Copper in specific ratios to the gold |
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Black Gold |
Uses various methods like Electroplating, Patination, & Controlled Oxidation of Gold containing Chromium or Cobalt |
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Electroplating |
It is a method of using black rhodium or ruthenium |
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Patination |
Is a method of applying sulfur & oxygen containing compounds |
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Ruthenium |
Solution that contains this gives a slightly harder black coating than those that contain Rhodium |
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Purple Gold |
-It is an alloy of gold and aluminum rich in gold aluminum intermetallic -It is more britte than other gold alloys, and a sharp blow may cause it to shatter |
Its other names are Amethyst Gold & Violet Gold |
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Blue Gold |
-It is alloy of gold and indium -It contains 46%Au about 12ct and 54%In forming an intermetallic compound AuIn2, with a clear blue color |
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