High temperature oxidation protection using nanocrystalline coatings

GAO and Z. LI, TheUniversity of Auckland, New Zealand and Y. HE, University of Science and Technology Beijing, China 

Key words oxidation, deposition, coating, sputtering, ceramic, nanomaterials. 

Thermodynamically, when exposed to high temperature atmospheres, most metals will be oxidized through extensive reactions with carbon, nitrogen, oxygen or sulfur. Oxidation of metallic stmctural components inevitably results in the regression of the load-bearing cross-section and eventually leads to premature failure of the stracture. In this respect, the oxidation of metals should be prevented by every means. 

A higher content of the alloying element will then be beneficial to the establishment and maintenance of the protective oxide scale of excellent oxidation 

Alloy A-B with a coating of same composition but small grains 

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High temperature oxidation protection using nanocrystalline coatings... 

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