Loading [MathJax]/jax/output/HTML-CSS/fonts/TeX/fontdata.js
Amber Parmar
Mind Map by , created more than 1 year ago

(Chemistry) Mind Map on Alloys, created by Amber Parmar on 22/05/2013.

108
0
0
Amber Parmar
Created by Amber Parmar about 12 years ago
Rate this resource by clicking on the stars below:
1 2 3 4 5 (0)
Ratings (0)
0
0
0
0
0

0 comments

There are no comments, be the first and leave one below:

Close
AlloysAn alloy is a Mixture of a Metaland Other ElementsAlloys can be a mixture of two ormore different metals (like brass orbronze)They can also be a mixtureof a metal and a non-metal(like steel)Alloys often haveproperties that aredifferent from the metalsthey are made from- andthese new properties oftenmake the alloy moreuseful than the pure metalSteel is an Alloy of Iron andCarbonSteel is harder thanIronSteel is also strongerthan iron, as long asthe amount of carbondoes not get largerthan about 1%.Iron on its own will rustfairly quickly, but steelis much less likely torust.A lot of things are made from steel- girders,bridges, engine parts, cutlery, washingmachines, saucepans, ships, drill bits, carsetc.Brass, Bronze, Solder and Amalgam are alsoAlloysBrass is an alloy of copper and zinc. most of the properties of brass are just a mixture of those of the copper and zinc,although brass is harder than either of them. Brass is used for making brass musical instruments (trumpets, trombones,French horns etc.). it is also used for fixtures and fittings such as screws, springs, doorknobs etc.Bronze is an alloy of copper and tin. It's much harder andstronger than tin, and it's more resistant to corrossion thaneither copper or tin. Broze is used to make springs and motorbearings. It's also used to make bells, and it's used insculpture.Solder is usually an alloy of lead and tin. Unlike purematerials it doesn;t have a definite melting point, butgradually solidifies as it cools down. This is prettyuseful if you want to solder things together.An amalgam is an alloy containingmercury. A large-scale use of one kindof amalgam is in dentistry, for fillingteeth.Modern fillings tend to be made fromtooth-coloured resin instead. This is partly becauseamalgam fillings are dark silvery in colour, andthereforemrather obvious in your mouth, andpartly becasue people worry that the mercury inthe amlgam could cause health problems(although there is not much evidence for this).Some Alloys areSmartNitinol is the name given to a familyof alloys of nickel and titanium thathave shape memory.This means they "remember" their original shape,and go back to it even after being bent and twisted.This has increased the number of uses for alloys. You can get specswith Nitinol frames- these can be bent and even sat on and they still goback into their original shape.Double click this nodeto edit the textClick and drag this buttonto create a new node