why study imperfections in solids many of the important properties of materials are due to the presence of imperfections pure metals experience significant alterations when alloyed sterling silver 92 5 ...
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...Why study imperfections in solids many of the important properties materials are due to presence pure metals experience significant alterations when alloyed sterling silver ag cu cartridge brass zn impurities play roles semiconductors steel composition and making atomic defects responsible for reducing gas pollutant emissions automobiles molecules gases become attached surface crystalline metallic ce zr o catalytic converter while these sites chemical reactions convert them into other non or less polluting substances catalyst is a substance that speeds up rate reaction without participating itself adsorbs on its pollutants co nox unburned hydrocarbons which converted h active catalysts normally schematic representation high resolution transmission electron micrograph potential adsorption single crystal used converters http auto howstuffworks com cat alytic htm there two different types at work reduction an oxidation both consist ceramic structure coated with metal usually platinum rhod...