2.0 - ceramics are crystalline(crystalline structure can be...

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OVERVIEW OF ENGINEERING MATERIALS STRUCTURE PROPERTIES EXAMPLES Metals/ Alloys any metallic element /alloy (see periodic table) simple crystalline structure metallic atomic bonding delocalized electrons high conductivity not transparent to visible light (i.e. opaque) lustrous strong ductile iron (Fe) steel (Fe+C) aluminum (Al) copper (Cu) brass (Cu+Zn) magnesium (Mg titanium (Ti) nickel (Ni) zinc (Zn) Ceramics/ Glasses/ & Glass- Ceramics compounds of metals and non- metals (see periodic table) primarily ionic atomic bonding (however, these bonds might have some covalent character)
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Unformatted text preview: ceramics are crystalline (crystalline structure can be relatively simple to relatively complex) glasses are amorphous (primarily made of SiO 2 ) glass-ceramics are devitrified glasses insulative refractory wear resistant brittle strong hard chemically stable high melting temps glasses are transparent gl-cer can have low thermal expansion (good for thermal stresses) oxides (Al 2 O 3 , MgO, SiO 2 ) nitrides (Si 3 N 4 ) carbides silicates lithium-alumino-silicates clay cement...
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This note was uploaded on 06/10/2009 for the course ENGN 45 taught by Professor Wendy during the Spring '09 term at City College of San Francisco.

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