PY3090Preparation of Materials

Lecture 1

Colm Stephens

School of Physics

Text Books

• Materials Science & EngineeringAn IntroductionWilliam D Callister, Jr.S-LEN 620.11 53*5;1 …. 10

• Introduction to Materials Science for EngineersJames F Shackelford620.11 M56*5

Historical Perspective

Metals

Ceramics

Semiconductors

Polymers

Bonding

• MetallicBonding

Bonding

• CovalentBonding

Bonding

• IonicBonding

Bonding

• Van der WaalsBonding

Types of bonding in engineering materials

Si, CdSCovalent or ionic/covalent

Semiconductors

PolyethlyneCovalent and secondary

Polymers

Silica (crystalline and amorphous)

Ionic/covalentCeramics and Glasses

Iron, CuMetallicMetal

ExampleBonding CharacterMaterial Type

7 Crystal Systems14 Crystal (Bravais) Lattices

Atomic Packing Factor

cellunitofvolumeTotal

cellunitainatomsofVolumeAPF

HomeworkCalculate the APF for • (Primitive) cubic • BCC• FCC