-rystalstructure:hard-ballmodel;unitcell;:,etal.,TheStructureandPropertiesofMaterials,,JohnWiley&Sons,-rystalstructure:hard-ballmodel;unitcell;:,etal.,TheStructureandPropertiesofMaterials,,JohnWiley&Sons,-packedcrystalstructure:unitcell;:,etal.,TheStructureandPropertiesofMaterials,,JohnWiley&Sons,:structurebeforedeformation;.2铁形成体心立方结构(α-铁)低于912?(1674)和1394以上的?(2541),但它形成的面心立方结构(伽马铁)之间912?和1394?。,如酚醛层压板,环氧玻璃布棒,还有树脂+-ture,alargegrainsizeisgenerallyassociatedwithlowstrength,lowhardness,andlowduc-,particularlyinsheetmetals,alsocausearoughsurfaceappearanceal',thegreaterthenumberofentanglements,henceanincreaseinthemetal'sstrength..,,andelectricalconductivity,areadverselyaffectedbythesedefect;theseareknownasstructure-,arenotsensitivetothesedefects,theseareknownasstructure-,calleddislocationsPointdefects,suchasavacancy(missingatom),aninterstitialatom(extraatominthelattice),oranimpurity(foreignatom)thathasreplacedtheatomofthepuremetalVolumeorbulkimperfections,suchasvoidorinclusions(nonmetallicelementssuchasoxides,sulfides,andsilicates);Planarimperfections,,a
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