LessonTwoN（螺混合型位错型+刃型）YEdgeScrew130起17CEBEIUNITEOUNIVERSITY
Lesson Two 2025/8/24 17 • 混合型位错（螺 型+刃型 ）
LessonTwo6面缺陷·堆垛层错（stackingfault)抽出型层错插入型层错如面心立方：抽ABCA （B) CABC出插ABC(B)ABCABC120±5/812418大MEBELUNITEO UNIVERSITY
Lesson Two 2025/8/24 18 面缺陷 • 堆垛层错（stacking fault） 抽出型层错 插入型层错 如面心立方： ABCA（B）CABC 抽 出 ABC（B）ABCABC 插 入
LessonTwo晶界晶界上的原子平均能量高于晶内原子，高出的肥单为胆乔肥。晶界Db/8晶粒2晶粒6(o)小角度晶界13025/812419大CEBEIUNITEOUNIVERSITT
Lesson Two 2025/8/24 19 • 晶界 • 晶界上的原子平均能量高于晶内原子，高出的 能量称为晶界能。 小角度晶界
LessonTwo8李晶界WAACBABABCACBA6SQ小Matrix1(1)0Twinnir.planeTwinMatrix130±5/8124大号20MEBEIUNITEOUNIVERSITY
Lesson Two 2025/8/24 20 孪晶界
LessonTwot1ol:ion·亚晶界扭转晶界面心立方结构中的（001）面相符扭转晶界ForeignimpuritySelf-interstitial type atomVoid,vacancyStrained bondGrain boundaryBroken bond(danglingbond)Fig-1.5l:Thegrain boundaries havebroken bonds,voids,vacancies,strainedbondsand"interstitial"typeatoms.Thestructureofthegrainboundary is disordered andthe atoms in the grain boundaries have higherenergiesthanthosewithinthegrains.扭转晶界(i=n)130±5/8124大学21MEBELUNITEO UNIVERSITY
Lesson Two 2025/8/24 21 • 亚晶界 扭转晶界 扭转晶界 (u n) = 面心立方结构中的(001)面 相符扭转晶界 u Strained bond Broken bond (dangling bond) Grain boundary Void, vacancy Self-interstitial type atom Foreign impurity Fig. 1.51: The grain boundaries have broken bonds, voids, vacancies, strained bonds and "interstitial" type atoms. The structure of the grain boundary is disordered and the atoms in the grain boundaries have higher energies than those within the grains