EDUP1005 Lecture Notes - Lecture 12: Covalent Bond, Toughened Glass, Kaolinite
Document Summary
Metallic bonding: the delocalized electrons conduct heat and electricity (electricity is moving charges) Dislocations: either resulted in stress being passed on. Types of dislocation: edge dislocations, screw dislocations, double screw dislocation (on the surface of a crystal of the protein canavalin) Polycrystalline materials: splits in grain barriers, material made up of many structures may be formed into bigger pieces that form the main structure grains. Iron carbon alloy image: packing of soap bubbles, thinking about a metal and the liability of it to break placing stress on an object and causing it to break. Indentations of changes in the overall structure of the metal. Breaking glass: a crack forms at a surface flaw. The louder the sound the larger the vibrations. It also has to be cut to size before being tempered because cutting after tempering involves shattering of the sheet: because the glass core is under tension when it breaks it breaks everywhere!
