Silicon carbide impelle taken from mould

Silicon carbide impelle taken from mould

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Caption: A silicon carbide impeller assembly being removed from a mould. Silicon carbide is one of the hardest materials known. As a result, it may not be machined in the normal way. Complex components, such as this impeller for a gas turbine engine, must therefore be moulded with extremely high precision. In additon, the properties of silicon carbide require very high temperatures and pressures to be used in moulding, hence the size of the mould compared to that of the component. Ceramics such as silicon carbide are finding increased use in gas turbine ('jet') engines due to their very high strength and resistance to heat and corrosion.

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Keywords: engine technology, gas turbine, impeller, moulding, silicon carbide, turbine

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