MATE 271
Introduction to Materials Science and
Engineering
Instructor: Ashraf Bastawros
Office 2347 Howe Hall
Tel:294-3039
Material Sciences and Engineering
MatE271
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Objectives of Materials Science
1. Understand structure-properties
relationship
2. Manipulate atomic/microstructural
processes to create desired structure &
properties.
Material Sciences and Engineering
Material Sciences and Engineering,
MatE271
MatE271
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Course Outline
1. Classes of Materials
Metals, Ceramics, Polymers, Composites,
2. Structure Structure
- Crystal Metals & Ceramics structures
- Defects and Diffusion
- Polymeric (macromolecular) structures
- Phase diagrams/ Phase Transformation Crystal
3. Properties
- Mechanical, Electrical, Optical, etc.
4. Applications
- Composites, Material Selection, Case Studies
Material Sciences and Engineering
MatE271
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How will grades be determined?
- Homework
20%
-Two Midterms (2@ 25% ea.) 50%
- Final Exam
30%
- Exams are open Exams are open-notes
Letter grades
A
>93%
C+
>75%
A-
>88%
C
>70%
B+
>85%
C-
>68%
B
>82%
D+
>65%
B-
>78%
D
>60%
F
<60%
Material Sciences and Engineering
Material Sciences and Engineering,
MatE271
MatE271
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2
Goals for this unit
- Establish class organization/structure,
goals and expectations
- Introduction to types of materials
Material Sciences and Engineering
MatE271
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Historical Perspective
• Civilization strongly linked with materials
• Stone age, iron age, bronze age …nuclear age,
information age
• Technological advances have been
materials driven
•
•
•
•
Transportation; engines, airframes, auto bodies
Space exploration; shuttle tiles, high temp alloys
Energy; solar power, batteries
Communications; semiconductors
• Military uses Þ Commercial uses
Material Sciences and Engineering
Material Sciences and Engineering,
MatE271
MatE271
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3
Periodic Table - Chemical
Classification
Material Sciences and Engineering
MatE271
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Introduction: Classes of Materials
I. Metals
n
n
n
Pure metallic elements or
Combination of metallic elements (alloys)
Properties
- ductility
- strong
- luster
- good conductor
- susceptible to corrosion susceptible to c
Material Sciences and Engineering
Material Sciences and Engineering,
MatE271
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Common metal parts
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MatE271
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Classes of Materials
II. Ceramics and Glasses
- Crystalline and noncrystalline
- Compounds between metals and nonmetals
- Principally oxides, nitrides, carbides
- Properties
- refractory (can withstand high temperatures)
- insulating and many are transparent
- chemical inertness
- strong but brittle
Material Sciences and Engineering
Material Sciences and Engineering,
MatE271
MatE271
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5
Ceramics and Glasses
Material Sciences and Engineering
MatE271
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Classes of Materials
III. Polymers
- Many are organic compounds
- Chemically based on C, H, other nonnon-metals
- Large molecular structures,
structures, often glassy
Polymer panel
Material Sciences and Engineering
Material Sciences and Engineering,
MatE271
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6
Polymeric materials
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MatE271
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Classes of Materials
IV. Composites
- combinations of other classes
“Best of both”
Material Sciences and Engineering
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Classes of Materials
V. Semiconductors (ceramics)
- basis for microelectronic
circuitry
- electrical behavior
tailorable by careful
doping
(intermediate properties)
properties)
Material Sciences and Engineering
MatE271
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Structure/Properties Relationship
- Observable Characteristics
- properties (mechanical, electrical, thermal,
magnetic, optical)
- Determined by Structure
- atomic scale structure
- crystal unit cells, Angstroms (10-10 m)
- microscopic scale structure
- nanostructure, nanometers (10 -9 m) m)
- microstructure, (10 -6 m)
Material Sciences and Engineering
Material Sciences and Engineering,
MatE271
m)
MatE271
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Reading Assignment
Shackelford 2001(5th Ed)
– Chapter 1
– Read Ahead: Chapter 2
Check class web site:
www.public.iastate.edu\~bastaw\courses\Mate271.html
Material Sciences and Engineering
Material Sciences and Engineering,
MatE271
MatE271
Week 0
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