Graphite is indeed used in aerospace, primarily in the form of reinforced carbon which is used for wing leading edges and the nose cone of the Space Shuttle orbiter to resist huge temperatures during re-entry into the earth’s atmosphere.
Detailed Explanation:
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High-Temperature Resistance: Graphite is known for its exceptional thermal stability and can maintain its dimensions even at temperatures up to 5000°F. This property makes it an ideal material for applications where high temperatures are encountered, such as in aerospace.
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Reinforced Carbon Applications: In the aerospace industry, graphite is used in a reinforced form known as reinforced carbon-carbon (RCC). This material is specifically designed to withstand the extreme heat experienced during the re-entry phase of space missions. The RCC is used on the wing leading edges and the nose cone of the Space Shuttle orbiter, where temperatures can reach up to 2300°F. The material's ability to resist thermal shock and oxidation makes it crucial for the structural integrity and safety of the spacecraft during re-entry.
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Corrosion Resistance: Graphite also exhibits great corrosion resistance, which is another critical factor in aerospace applications where materials are exposed to harsh environmental conditions, including high temperatures and oxidizing atmospheres.
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Manufacturing and Purification: The process of manufacturing graphite for aerospace applications involves rigorous purification to remove impurities, especially when used in sensitive areas like the leading edges of spacecraft. This purification typically involves heating the graphite in halogen gas at high temperatures, ensuring that it meets the stringent purity requirements necessary for such critical applications.
In summary, graphite's unique properties, including high-temperature resistance, corrosion resistance, and the ability to be purified to high levels, make it an indispensable material in the aerospace industry, particularly in applications involving thermal protection systems during spacecraft re-entry.
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