A composite material is BEST defined as:
A{'text': 'A single-phase alloy of two or more metals', 'label': 'A'}
B{'text': 'A polymer with carbon dispersed at the molecular level', 'label': 'C'}
C{'text': 'A material consisting of TWO OR MORE distinct constituent materials (reinforcement + matrix) that retain their individual identities', 'label': 'B'}
D{'text': 'A pure ceramic', 'label': 'D'}
Answer & Solution
Correct answer: C. {'text': 'A material consisting of TWO OR MORE distinct constituent materials (reinforcement + matrix) that retain their individual identities', 'label': 'B'}
Composites have two or more distinct phases (reinforcement embedded in a matrix) that retain their individual identity at the macro/micro level — unlike alloys, where atoms diffuse into a single phase.
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