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Novel Additively Manufactured Nb-Si-Cr-(Mo) Refractory Alloys with High Strength and Oxidation Resistance


Invention Reference Number

Aviation engineers

High strength, oxidation resistant refractory alloys are difficult to fabricate for commercial use in extreme environments. A niobium-based alloy is the most widely commercially used refractory alloy as it can withstand high temperatures, large temperature gradients, and hypersonic speeds that cause high stress on materials. However, its low strength and poor oxidation resistance have limited its use. This technology utilizes additive manufacturing to fabricate improved and novel refractory alloys of high strength and oxidation resistance for extreme environments that overcome these obstacles.


Additive manufacturing presents a new avenue for refractory metal that opens the door for development of improved refractory alloys for extreme environments that previously were inaccessible. This technology utilizes novel alloys that have favorable characteristics for these extreme uses, notably the ability to withstand high temperature, large temperature gradients, hypersonic speeds, provide high strength and are resistant to oxidation. These typically would be difficult to manufacture, but AM makes it possible to fabricate uniform and finely distributed microstructures. These alloys can be used in temperatures beyond what the nickel-based alloys currently use, at more than 1200 C. These alloys are oxidation resistant and strong, and are lighter than nickel and niobium currently used.


  • Can be used in extreme environments: high temperature and stress 
  • Resists oxidation
  • Increased strength
  • Easier to manufacture
  • Withstands hypersonic speeds

Applications and Industries

  • Aerospace
  • Engine turbine manufacturers


To learn more about this technology, email or call 865-574-1051.