, Volume 62, Issue 10, pp 13–19 | Cite as

Oxidation-resistant coatings for ultra-high-temperature refractory Mo-based alloys

  • J. H. PerepezkoEmail author
  • R. Sakidja
Refractory Metals Research Summary


The synthesis of robust coatings that provide protection against environmental attack at ultra-high temperatures is a difficult challenge. In order to achieve this goal for Mo-based alloys the fundamental concepts of reactive diffusion pathway analysis and kinetic biasing are used to design a multilayer coating with a phase sequencing that provides for structural and thermodynamic compatibility and an underlying diffusion barrier to maintain coating integrity. The coating structure evolution during high-temperature exposure facilitates a prolonged lifetime as well as a self-healing capability. Both borosilicide and aluminide coatings that can be synthesized by a pack cementation process are demonstrated to yield superior environmental resistance on Mo-based systems at temperatures up to l,700°C and can be adapted to apply to other refractory metal systems.


Cementation Multilayer Coating Aluminide Coating Pack Cementation Cementation Process 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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© TMS 2010

Authors and Affiliations

  1. 1.Department of Materials Science and EngineeringUniversity of Wisconsin-MadisonMadisonUSA

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