Question: A polycrystalline structure . . . is very uncommon. only occurs in polymeric materials. is very common and is made up of many small crystals
A polycrystalline structure
is very uncommon.
only occurs in polymeric materials.
is very common and is made up of many small crystals grains that initiate, form on solidification, and grow until they meet up with other small crystals, forming grain boundaries.
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