SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Crystallographic orientation varies from grain to grain.
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Composed of a collection of small crystals or grains
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There exists an atomic mismatch within region of grains
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Everything in the list are characteristics of Polycrystalline materials.
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Detailed explanation-1: -Most inorganic solids are polycrystalline, including all common metals, many ceramics, rocks and ice.
Detailed explanation-2: -Some examples include: ductility, brittleness and electrical conductivity. The misorientation affects the properties of the boundary such as its surface tension, mobility and stiffness and is therefore of great importance in the study of grain boundaries.
Detailed explanation-3: -Answer and Explanation: The properties of polycrystalline materials are mostly isotropic because their grain orientations become random prior facilitation of any material deformation. Polycrystalline materials have various fundamental properties, such as the presence of single-dimensional line defects and pores.