Structures of Metals and Ceramics

Goals

• Define basic terms and give examples of each:
  • Lattice
  • Basis Atoms (Decorations or Motifs)
  • Crystal Structure
  • Unit Cell
  • Coordination Numbers
• Describe hard-sphere packing and identify cell symmetry
• Crystals density: the mass per volume (e.g. g/cm³)
• Linear Density: the number of atoms per unit length (e.g. cm^-1)
• Planar Densities: the number of atoms per unit area (e.g. cm^-2)

Learning Objective

• Know and utilize definitions to describe structure and defects in various solid phases (crystal structures)
• Compute densities for close-packed structures
• Identify Symmetry of Cells
• Specify directions and planes for crystals and be able to relate to characterization experiments

Content

• ENERGY AND PACKING
• Atomic PACKING
• Crystalline Solids: Unit Cells
• Unit Cells and Unit Cell Vectors
• Possible Crystal Classes
• Unit Cells Types
• The 14 Bravais Lattices!
• Counting Number of Atoms Per Unit Cell
• UNIT CELL - 3D Lattices
• Coordination Number of a Given Atom
• Unit Cells and Volume Packing
• Atomic Packing Fraction for FCC
• Basic Geometry for FCC
• Atomic Packing Fraction for FCC
• Summary APF for BCC
• FCC Stacking
• Comparing the FCC and HCP Planes Stacking
• Packing Densities in Crystals: Lines Planes and Volumes
• Linear Packing Density in FCC
• Planar Packing Density in FCC
• Theoretical Density
• Characteristics of Selected Elements at 20 C
• DENSITIES OF MATERIAL CLASSES
• SUMMARY

Researchers should cite this work as follows:

• Duane Douglas Johnson; Omar N Sobh (2008), "Illinois MATSE 280 Introduction to Engineering Materials, Lecture 3 Part 1: Structure of Metals and Ceramics," http://nanohub.org/resources/5460.

  BibTex | EndNote

1. course lecture
2. Illinois
3. material properties
4. materials
5. material science
6. nanobio applications