Codeposition of Metals for Oxidation Protection Above 2200  Degrees Centigrade
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Platinum group metal (PGM) coatings have been shown to provide                  oxidation protection for rocket engine components operating to 2200             C.  Platinum, rhodium and iridium form compounds with zirconium and             hafnium.  These compounds are of great interest because they are very           stable, with melting points higher than those of either constituent.            Furthermore, zirconium and hafnium can be formed by chemical vapor              deposition (CVD) similar to processes employed for depositing                   platinum group metals.  Codeposition is thus possible, which will               produce coatings of uniform constituency.  In this Phase I program,             Ultramet proposes to demonstrate the feasibility of forming  compound           coatings in this manner and test for oxidation resistance to 2400 C.            The ability to reduce the percentage of PGM Constituents, and use               thinner coatings, will serve to conserve these scarce metals.
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{'Code': '537100', 'Text': 'SBIR Phase I'}
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