Research finds enhanced heat resistance in niobium and molybdenum composites with specific coatings, indicating potential for high-temperature applications.
The heat resistance of composite materials produced by the method of diffusion welding under pressure and consisting of alternating layers of niobium, molybdenum, Nb30Ti alloys or Nb0.1C and layers of intermetallic compounds of Nb-Al, Ti-Al or Mo-Al systems has been studied. Two types of coatings were deposited on the composite samples: a sol-gel coating ZrO2-Y2O3 or an electrochemical chromium-diamond coating. The samples were tested for heat resistance in air at temperatures of 800 and 1000 °C. The highest heat resistance, several orders of magnitude higher than the heat resistance of uncoated niobium samples, was shown by Nb30Ti / Al composite samples with a chromium-diamond coating.
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Korzhov et al. (2022) studied this question.
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