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What is the principal advantage of carbon-carbon composites over metal alloys for high-temperature applications?
A{'text': 'Higher density', 'label': 'C'}
B{'text': 'Strength INCREASES (or remains stable) with temperature up to ~2000°C, while metals soften', 'label': 'B'}
C{'text': 'Lower cost', 'label': 'A'}
D{'text': 'Easier to manufacture', 'label': 'D'}
Answer & Solution
Correct answer: B. {'text': 'Strength INCREASES (or remains stable) with temperature up to ~2000°C, while metals soften', 'label': 'B'}
Carbon-Carbon composites retain mechanical properties at very high temperatures (in inert atmospheres or with anti-oxidation coatings). Metal alloys lose strength rapidly above ~1000°C. Used in rocket nozzle throats, atmospheric re-entry leading edges.
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