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1. Classification y Ideal or perfect crystal real or defect crystal According to dimension o point defect: vacancies, interstitial atoms s line defect dislocation planar defect: stacking fault o volume defect mosaic structure
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3. Application of Schmid's law How to determine the active S.S. for all the equivalent S.S. 2 Determine the active S.S. by Reflection Rule. Orientation cell for cubic crystals. Given: BCC Crystal having {110}slip system. Determine: active slip system in response to tensile loading along
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I Introduction Silicates are compounds that mainly composed of [sio4]. It is the essential components of most rock and soil, such as quartz, feldspar, mica etc
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1. The structure of am b differs from those of either a or B 2. Its composition is variable to more or lessextension 3. Mixed bonding 4. Intermediate properties
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3. 1 Basic concepts of al loys 1. Definition An alloy is the combination of metal(s) with other elements through chemical bonding. Termino logy
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4.9 Comparison Between Slip and Twinning Similar ity Both slip and twinning are shear process under shear stress T I. Differences 1. Orientation 2. Atom movement 3.y,△ a) Structure: Twinning is easy 4. Conditions b) Temperature da d c) Strain rate (c
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2. Classification of materials based on structure Regularity in atom arrangement periodic or not (amorphous)
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2.3 Crystal Structure and Complex Lattice | Crystal structure is the real arrangement of atom in crystals Crystal structure Space lattice Basis or structure unit
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Chapter 1 Atomic Structure and Bonding 1.1 Atomic structure Atomic numbers and atomic masses 1. Atomic Models
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1.形态结构:球形,120-300nm,核心为线性双链DNA,衣壳为20面体立体对称,有包膜及包膜刺突 2.除EBV外,均可在人二倍体细胞核内复制,产生明显CPE(如多核巨细胞等),核内有嗜酸性包涵体。 3.病毒感染后可表现为①增殖性感染 ②潜伏性感染;③整合感染。 4.多可垂直传播感染胎儿或新生儿
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