Question

True/False: Polycrystalline materials have many mis-oriented crystalline grains in their microstructure because the phase transformations used to create these materials (e.g., solidification) occur via a nucleation and growth process.

Answer 1

The statement 'polycrystalline materials have misoriented crystalline grains because phase transformations occur via a nucleation and growth process' is TRUE. Polycrystalline materials consist of many crystallites.

Polycrystalline materials are solid materials consisting of many crystallites, which vary in both size and orientation.

Polycrystalline materials include, among others, rocks, ice, metals, ceramics, etc.

Nucleation refers to the chemical process by which solid crystals form from a liquid.

In the solidification of polycrystalline materials via nucleation, molecules are first arranged in a particular pattern form which additional particles can be added as the crystal grows.

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