The document is a lecture on engineering materials and applications that discusses the classification and atomic structure of materials. It covers the main classes of solid materials like metals, ceramics, polymers, and composites. The lecture also outlines that chapter 2 will focus on atomic structure and interatomic bonding, including why they are important to study, atomic structure concepts, the periodic table, and different types of primary bonds that determine material properties and classification.

1. ENGINEERING MATERIALS AND
APPLICATIONS: MR 221
Lecture #3
Mechanical Engineering Department, Faculty of
Engineering, Assiut University, Assiut 71516,
Egypt.

2. CLASSIFICATION OF MATERIALS
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Solid materials classes
Metals
Ceramics
Polymers
Composites
Advanced materials
Semiconductors
Biomaterials
Smart Materials
(Based on chemical makeup and atomic structure)

3. OUTLINE
 Chapter 2: Atomic Structure and Interatomic
Bonding
- Why study Atomic Structure and Interatomic Bonding?
- Atomic Structure
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• Electrons in atoms
• Fundamental concepts
• The periodic table
- Atomic Bonding in Solids
• Secondary bonding or van der waals bonding
• Mixed bonding
• Molecules
• Bonding type-material classification correlations
• Primary interatomic bonds

4. WHY STUDY ATOMIC STRUCTURE AND INTERATOMIC BONDING?
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Material’s
properties
Example:
Atomic
Structure
Diamond Graphite
http://en.wikipedia.org

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ATOMIC STRUCTURE

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Protons, neutrons, and electrons are composed of other subatomic particles such
as quarks, neutrinos, and bosons. However, this discussion is concerned only with
protons, neutrons, and electrons.
ATOMIC STRUCTURE

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ATOMIC STRUCTURE

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electrons in atoms………….. Atomic Models
ATOMIC STRUCTURE
quantum mechanics
‫مشعة‬ ‫نظائر‬ isotopes

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