Engineering and Technology

Engineering and Technology

The structure of materials can be classified by the general magnitude of various features being considered. The three most common major classification of structural, listed generally in increasing size, are:

Atomic structure, which includes features that cannot be seen, such as the types of bonding between the atoms, and the way the atoms are arranged.
Microstructure, which includes features that can be seen using a microscope, but seldom with the naked eye. 
Macrostructure, which includes features that can be seen with the naked eye)

The atomic structure primarily affects the chemical, physical, thermal, electrical, magnetic, and optical properties. The microstructure and macrostructure can also affect these properties but they generally have a larger effect on mechanical properties and on the rate of chemical reaction. The properties of a material offer clues as to the structure of the material. The strength of metals suggests that these atoms are held together by strong bonds. However, these bonds must also allow atoms to move since metals are also usually formable.

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