Lim, HJ Park, SW Kang, SG 2024-01-21T17:45:17Z 2024-01-21T17:45:17Z 2021-09-04 1997-12 0030-770X https://pubs.kist.re.kr/handle/201004/143493 The oxidation behavior of Ni-Cr alloys with various chromium concentrations and particle sizes of a dispersion of 10 vol.% Al2O3 was observed in 1 atm of oxygen at 1000 degrees C, This study was intended to determine the critical chromium concentration to form a protective Cr2O3 oxide layer for different Al2O3 particle sizes. The oxidation rate of Ni-Cr alloys containing 10 vol.% Al2O3 followed a parabolic rate law and a Cr2O3 protective layer continuously formed when the oxidation rate decreased rapidly. Times to form a continuous and protective Cr2O3 layer during the initial oxidation shortened as the size of the dispersion decreased The critical chromium concentration to form a protective Cr2O3 layer in the oxide scale was 6 similar to 9 wt.% and was related strongly to the particle size of the Al2O3 dispersion. English PLENUM PUBL CORP 1200 DEGREES C SELECTIVE OXIDATION CHROMIUM-ALLOYS DIFFUSION NICKEL SCALES The effect of particle size of alumina dispersions on the oxidation resistance of Ni-Cr alloys Article 10.1007/BF02153458 1 OXIDATION OF METALS, v.48, no.5-6, pp.391 - 415 OXIDATION OF METALS 48 5-6 391 415 scie scopus 000071615800003 Metallurgy & Metallurgical Engineering Metallurgy & Metallurgical Engineering Article 1200 DEGREES C SELECTIVE OXIDATION CHROMIUM-ALLOYS DIFFUSION NICKEL SCALES high-temperature oxidation Ni-Cr alloy oxidation rate protective Cr2O3 layer Al2O3 dispersion selective oxidation