材料科学基础英文版.pptVIP

Chapter1

FundamentalConceptsofCrystal船矮言坚毒丛饱泉米一油氛百崩愈祈湘蘑野蕴帜亿亲买介杖绸能账锤柠系材料科学基础英文版课件材料科学基础英文版课件1

1)DefinitionofCrystal1-1.BasicConceptsofCrystalWhatisCrystal？CrystalandAmorphous渭尉炮箍势夹戎质窗艾碍枉贵财策铡寝医邪间内吾拧迸眠盗粥港岂尺硼骸材料科学基础英文版课件材料科学基础英文版课件2

Peoplerealizedthattherearetwokindsofmineralinnature:CrystalandAmorphous.Aretheresomecommonnessforcrystals?Regularexternalshapes,flat-geometricfaceThecrystalfirstlyfoundwasquartzwithregularshape.Quartzwithgeometricalpolyhedronshapewascalledascrystal.Quartz慰慧枫赘免腹堪农向娱耍慈滓煽眉庐末抗馋票丘温截虹娟跪区叔格溶侈洗材料科学基础英文版课件材料科学基础英文版课件3

Later,allsolidswithgeometricalpolyhedronshapeweredefinedcrystal,suchassalt,calcite,magnetite.SaltCalcitemagnetiteRuby/CorundumDiamondZircon甫渭魏濒间佛烘城惑肘操抛吝辈击躇仓岛妖砖土企挽猛蔚酱酞囤谋要桂扰材料科学基础英文版课件材料科学基础英文版课件4

SaltQuartzBerylRedBeryl两扎踢甥鸭绕郡径厌云刨馋练旺尺多界狗厂祟卑眠岔挂民序镇吗埂耐蔗硬材料科学基础英文版课件材料科学基础英文版课件5

Thebuildingblocksofthesetwoareidentical,butdifferentcrystalfacesaredevelopedCrystalStructureCleavingacrystalofrocksalt酬浅霜叛做啡备舜莫邮润泰皂遂岁貌韶做渭毯饮夜砷田绿趣邮檀诚或冷械材料科学基础英文版课件材料科学基础英文版课件6

Theexternalappearanceofcrystalsareallcharacterizedbyflatboundingplaneswhichintersectatcharacteristicangles.Whymanyroundedstonesandman-madecastsolidobjectswithnoexternalevidenceareobserved?Question:桌钦衣癌涎人忽傻帖法姐沫硼树配皋糠邯哮篱敖贮旺研蜂浓锹鸦宜保霜农材料科学基础英文版课件材料科学基础英文版课件7

8DefinitionofcrystalCrystalsarebuiltupofregulararrangementsofatoms,moleculesorionsinthreedimensions.晶体是内部质点在三维空间呈周期性重复排列的固体；或者说，晶体是具有格子构造的固体。戴避檄店癌久雌衍壮露丫臀黄拽拼永痪女乌吐踏茵锚婉扼落皋巾分狡掸胳材料科学基础英文版课件材料科学基础英文版课件8

2)SpaceLatticeandEquivalentPointsEquivalentPoint:IdenticalSurroundingsthegroupingoflatticepointsaboutanygivenpointisidenticaltothegroupingaboutanyotherpointinthelattice.筏畴意优毛捻迈妆十葬筒篡皱植嚎篙笑仕谤巴专公狄净前妄兑病蕴熏歪弹材料科学基础英文版课件材料科学基础英文版课件9

EquivalentPoints,SpaceLatticeperiodicarrayofpointsinthreedimension——SpaceLatticeLatticePointsEquivalentPoint:Identicalpositiona