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Properties of materials - ASM International

Copyright 2010, ASM International . All Rights Reserved. Properties of materials : more than physical and chemical Structural Properties These aren t really Properties more like definitions that relate to what s under the hood. The goal here is to relate structure to Properties . Composition The kinds and relative count of elements, ions or other constituents in a material; chemical formula, percent in an alloy, etc. Note that a single composition can have different structures, for instance allotropes of sulfur or polymorphs in iron-carbon systems. The basic starting point is: Composition Bonding Metals metallic elements metallic Ceramics metals + nonmetals ionic & covalent Polymers carbon, hydrogen covalent Crystal structure Atomic scale order; the manner in which atoms or ions are spatially arranged.

Optical properties relate to a material’s response to elec tromagnetic radiation, primarily visible light. Light can be absorbed, transmitted, or reflected. Optical properties are important for all materials, not just transparent materials (think photoelectric effect). Transmissivity

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