Materials Science quizzes
How atomic structure shapes material properties, and why glass is a solid even without an ordered crystal structure.
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From Materials Science: Why Old Glass Is Not a Slow Liquid
What happens to pure iron's crystal structure when it is heated above about 912 °C?
- It becomes amorphous, like a glass
- It switches from BCC to FCC packing
- It stays the same right up to melting
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Answer: It switches from BCC to FCC packing
Iron is allotropic: the FCC form that appears at high temperature dissolves far more carbon, which is the basis of steel heat treatment.
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