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- W2354150876 abstract "A multi-element Nb-Si-X system in situ composite wi th composition of Nb-16Si-24Ti-6Cr-6Al-2Hf (at%) is prepared by arc metltin g method.The high temperature oxidation behavior of the alloy is investigated by scanning electron microscopy(SEM), energy dispersive spectrum(EDS) and X-ray d iffraction(XRD).The as-cast composite consistes of Nb ss phase and β-Nb 5Si3 phase, and after oxidation test at 1250℃ for 100h, the composite forme s a thick scale being mainly composed of CrNbO4 and TiNb2O7, below which s evere inner oxidation occurres.The morphological investigation also showes that the internal oxidation of Nb ss phase is faster than that of Nb5Si3 pha se, because of the faster diffusion of oxygen in Nb ss phase than in Nb5S i3 phase.It is suggested that the dispersion of the silicide phase has a benef icial effect on reducing the internal oxidation of the composite and releasing t he compression stress in oxide scale." @default.
- W2354150876 created "2016-06-24" @default.
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- W2354150876 date "2007-01-01" @default.
- W2354150876 modified "2023-09-22" @default.
- W2354150876 title "High Temperature Oxidation Behavior of a Multi-element Nb-Si System in Situ Composite" @default.
- W2354150876 hasPublicationYear "2007" @default.
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