Influence of Small Amounts of Boron on the Structural Evolution of Nanocrystalline Ni3Al During Thermal TreatmentsReportar como inadecuado




Influence of Small Amounts of Boron on the Structural Evolution of Nanocrystalline Ni3Al During Thermal Treatments - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.



Abstract : The influence of a boron addition 0.1 wt% on the structural stability of high-purity nanocrystalline Ni3Al intermetallic compounds was investigated. The nanocrystalline structure was obtained by severe shear deformation under quasi-hydrostatic pressure. Residual electrical resistivity, Vickers microhardness, X-Ray diffraction and transmission electron microscopy were used to characterize the material evolution during thermal treatments in the temperature range 293-1313 K. After severe deformation the materials were disordered with a smaller crystallite size in the boron-doped compound than in the pure one. The boron addition was found to shift the long-range ordering, as well as the recovery of the properties investigated to higher temperatures, i.e. to improve the thermal stability of the structure.





Autor: A. Korznikov O. Dimitrov A. Quivy G. Korznikova J. Devaud R. Valiev

Fuente: https://hal.archives-ouvertes.fr/



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