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所在平台: Coursera |
课程主页: https://www.coursera.org/learn/material-science-engineering
课程评论：没有评论
课程名称：材料加工 课程概述：你是否曾想过为什么陶瓷材料是坚硬而脆的，而金属则通常表现出延展性？某些材料为什么能够导热或导电，而其他材料则是绝缘体？为何向铁中添加少量碳就能形成强度大幅提升的合金？本课程将帮助你了解材料的特性是如何由材料的微观结构决定的，而微观结构又受材料成分和加工过程的影响。 该课程是Coursera上三门课程中的第二门，旨在与乔治亚理工学院大多数工程本科生学习的材料科学导论课程相呼应。课程目标是帮助学生更好地理解周围世界中使用的工程材料。第一部分涵盖材料科学的基本原理，包括原子结构与键合、晶体结构、原子及微观缺陷以及非晶态材料如玻璃、橡胶和聚合物等内容。 课程大纲： 第一部分：相图与相平衡 描述：本模块概述了与晶体材料加工相关的基本热力学和动力学知识。将重点介绍相图——用于描述材料在特定变量（如温度、压力和成分）条件下如何行为的图表。你将学习如何解释常见的和复杂的相图，并从中提取有用信息。 第二部分：结构转变的动力学 描述：如果热力学（在前面的模块中讨论）告诉我们材料希望如何变化，那么动力学则告诉我们这种转变是如何发生的以及发生的速度。本模块将从相变的驱动力开始讲解，涵盖析出物的成核与生长、固化和烧结等内容。最后，将有多个课程应用本课程所涵盖的知识来理解碳钢的特性。
Part: 1
Title:Phase Diagrams and Phase Equilibria
Description:This course picks up with an overview of basic thermodynamics and kinetics as they pertain to the processing of crystalline materials. The first module deals with phase diagrams - charts that tell us how a material will behave given a certain set of variables such as temperature, pressure, and composition. You will learn how to interpret common and complex phase diagrams and how to extract useful information from them.
Part: 2
Title:Kinetics of Structural Transformations
Description:If thermodynamics, which we covered in the previous module, tells us how a material wants to change, then kinetics tells us how and how quickly that transformation occurs. This module starts by explaining the driving force for phase transformations. We will cover the nucleation and growth of precipitates, solidification, and sintering. Finally, there are a number of lessons which apply all that has been covered in the course to understanding carbon steels.
Have you ever wondered why ceramics are hard and brittle while metals tend to be ductile? Why some materials conduct heat or electricity while others are insulators? Why adding just a small amount of carbon to iron results in an alloy that is so much stronger than the base metal? In this course, you will learn how a material’s properties are determined by the microstructure of the material, which is in turn determined by composition and the processing that the material has undergone. This is the second of three Coursera courses that mirror the Introduction to Materials Science class that is taken by most engineering undergrads at Georgia Tech. The aim of the course is to help students better understand the engineering materials that are used in the world around them. This first section covers the fundamentals of materials science including atomic structure and bonding, crystal structure, atomic and microscopic defects, and noncrystalline materials such as glasses, rubbers, and polymers.
