Quantification of Thermal Oxidation in Metallic Glass Powder using Ultra-small Angle X-ray Scattering.

ABSTRACT: In this paper, the composition, structure, morphology and kinetics of evolution during isothermal oxidation of Fe₄₈Cr₁₅Mo₁₄Y₂C₁₅B₆ metallic glass powder in the supercooled region are investigated by an integrated ex-situ and in-situ characterization and modelling approach. Raman and X-ray diffraction spectra established that oxidation yielded a hierarchical structure across decreasing length scales. At larger scale, Fe₂O₃ grows as a uniform shell over the powder core. This shell, at smaller scale, consists of multiple grains. Ultra-small angle X-ray scattering intensity acquired during isothermal oxidation of the powder over a wide Q-range delineated direct quantification of oxidation behavior. The hier

SUBMITTER: Paul T 

PROVIDER: S-EPMC6497630 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature