Assessment of the oxidation resistance of boron-containing zirconium-doped layers

The article discusses a technique for non-vacuum electron beam deposition of powder mixtures of zirconium and boron onto blanks made from 0.12C-18Cr-9Ni-1Ti steel to enhance the resistance of the surface layers to high-temperature oxidation. It has been demonstrated that when 20% Zr + 30% B are introduced, borides of Fe and Cr (FeB2 and CrB2) and intermetallic compounds ZrFe2 are formed, as well as solid solutions of α-(Cr, Fe) and γ-(Fe, Ni), resulting in a deposited layer thickness of approximately 2.5 millimeters. Studies of oxidation resistance at 950°C for 100 hours revealed a decrease in weight gain for modified samples to 1.3467 g/m2 compared to 13.5223 g/m2 for untreated steel, indicating a more than 10-fold improvement in oxidation resistance. These findings indicate the high effectiveness of this technique in enhancing the thermal stability of austenitic chromium-nickel steel.

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