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# 材料结构 1：材料结构基础

## Structure of Materials, Part 1: Fundamentals of Materials Structure

Discover the structure of the materials that make up our modern world and learn how this underlying structure influences the properties, performance and applications of these materials.

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edX
• 完成时间大约为 5
• 中级
• 英语

### 你将学到什么

The structural difference between a glass and a crystal

How we describe the structure of amorphous materials

What is the structure of glasses and polymers

What all crystals have in common and how do we differentiate them

The principles of x-ray diffraction that allow us to probe the structure of crystals

### 课程概况

Structure – or the arrangement of materials’ internal components – determines virtually everything about a material:  its properties, its potential applications, and its performance within those applications.  This course is the first in a three-part series from MIT’s Department of Materials Science and Engineering that explores the structure of a wide variety of materials with current-day engineering applications. Taken together, these three courses provide similar content to MIT’s sophomore-level materials structure curriculum.

Part 1 begins with an introduction to amorphous materials.  We explore glasses and polymers, learn about the factors that influence their structure, and learn how materials scientists measure and describe the structure of these materials. Then we begin a discussion of the crystalline state, exploring what it means for a material to be crystalline, how we describe periodic arrangement of atoms in a crystal, and how we can determine the structure of crystals through x-ray diffraction.

If you would like to explore the structure of materials further, we encourage you to enroll in Part 2 and Part 3 of the course.

Photo by User: Bill Burris on Flickr. (CC BY-SA) 2.0

### 课程大纲

Part 1: An Introduction to Materials Science

States of matter and bonding

Part 2: Descriptors

Descriptors: concept and function
Free volume
Pair distribution function

Part 3: Glasses

Glass processing methods
Continuous network model
Network modifiers

Part 4: Polymers

Random walk model
Chain-to-chain end distance
Order and disorder in polymers

Part 5: An Introduction to the Crystalline State

Translational symmetry
The crystalline state in 2D
The crystalline state in 3D

Part 6: Real and Reciprocal Space

Miller indices
Real space
Reciprocal space

Part 7: X-Ray Diffraction

Bragg’s Law
Diffraction examples

### 预备知识

University-level intro to chemistry
Basic linear algebra

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