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所在平台: Udemy |
课程主页: https://www.udemy.com/course/structure-of-materials/
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**课程名称：**材料结构 **课程概述：** 本课程将深入探讨材料的原子结构基础及其在材料中缺陷的影响。我们将从埃的尺度出发，首先研究原子键合，重点区分分子内相互作用与分子间相互作用。此外，我们还将通过相互作用能和电负性来区分这些相互作用。随后，我们将基于这些概念，将其应用于X射线衍射。 接着，在纳米尺度上，我们将考察晶体材料的结构基元，特别是如何构建简单立方、体心立方和面心立方晶胞。 最后，我们将探讨材料中的0维、1维、2维和3维缺陷。对于0维缺陷，我们将研究空位、填隙原子，并学习如何计算这些缺陷的平衡浓度及其与阿伦尼乌斯温度的依赖关系。还将介绍用于离子晶体缺陷表示的Kroger-Vink符号，并探讨本征和外在缺陷。 对于1维缺陷，我们将主要关注刃位错和螺位错。可以通过在平面上绘制伯格斯回路来确定缺陷类型。 对于2维和3维缺陷，我们将考察晶界和孔洞。
In this course we will examine the fundamentals of the atomistic structure of materials and the effect of defects in these materials. Starting at the angstrom length scale we will first exam bonding specifically determining the difference between intramolecular and intermolecular interactions. Additionally, these interactions will be differentiated between the energy of interactions and electronegativity. We will then build upon these concepts to and apply this to X-Ray diffraction. Building up to the nanometer length scale we will examine the structural motifs in crystalline materials specifically how we develop unit cells of simple cubic, body centered cubic, and face centered cubic. Finally, we will examine 0, 1, 2, and 3D defects in materials. For 0D defects we will examine and investigate vacancies, interstitial, and how to calculate the equilibrium concentrations of these defects as well as the Arrhenius temperature dependence. Additionally, 0D Kroger-Vink notation for writing defects in ionic crystals. Both intrinsic and extrinsic defects will be investigated. For 1D defects we will focus primarily on edge and screw defects. These defects can be determined by drawing Burger's circuits in a plane to find the type of defect. For 2D and 3D defects we will examine grain boundaries and voids.
