Magnalium is a lightweight metallic alloy composed of_____________?
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Answer: C. Aluminium and Magnesium
Explanation
Magnalium is a lightweight metallic alloy composed mostly of aluminum combined with magnesium. Adding magnesium to aluminum enhances its mechanical strength while maintaining a very low overall density. This specific metallic combination provides excellent corrosion resistance and desirable structural characteristics. Alloys are metallic materials formed by combining two or more elemental metals to improve properties. Aluminum is renowned for its light weight, whereas magnesium is even lighter and highly reactive. Metallurgists carefully control alloy proportions to achieve specific melting points and tensile strengths.
Magnalium is widely used in aerospace engineering and automotive manufacturing to reduce total vehicle weight. Pyrotechnicians utilize powdered magnalium metal to create brilliant white flashes in specialized firework displays. Precision instrument makers choose this durable alloy to construct lightweight and rigid mechanical components. Magnesium and lead would create a very heavy alloy, contradicting the primary lightweight nature. Aluminium and zinc form a different alloy family commonly used for die casting rather than magnalium. Aluminum and mercury are not combined to make magnalium, as mercury damages structural aluminum integrity.
- Subject
- Everyday Science
- Category
- Everyday Science
- Topic
- —
- Difficulty
- medium
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