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Experimental Study of the Cr-Hf-Nb System: Liquidus Projection and 1200 °C Isothermal Section

João Carlos Jânio GIGOLOTTI Antonio Augusto Araujo Pinto Silva; Gilberto Carvalho COELHO; Carlos Angelo Nunes; Jean-Marc Joubert

Journal of phase equilibria and diffusion v., n. , p.1-19, 2020

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Título:
Experimental Study of the Cr-Hf-Nb System: Liquidus Projection and 1200 °C Isothermal Section
Autor: João Carlos Jânio GIGOLOTTI
Antonio Augusto Araujo Pinto Silva; Gilberto Carvalho COELHO; Carlos Angelo Nunes; Jean-Marc Joubert
Assuntos: DIAGRAMA DE TRANSFORMAÇÃO DE FASE; Cr-Hf-Nb System; Intermetallics; Microstructure; Phase Stability
É parte de: Journal of phase equilibria and diffusion v., n. , p.1-19, 2020
Notas: Disponível em: https://doi.org/10.1007/s11669-020-00838-w. Acesso em: 08 abr. 2022.
Descrição: Phase equilibria data from ternary Cr-Nb-X (X = Hf, Ta, Ti, Zr) systems are relevant to the development of Niobium-silicide based composites for use in jet engines. Such systems present at several temperatures a pseudo-binary of Cr2Nb-Cr2X Laves phases. This work presents the experimentally determined liquidus projection and the 1200 °C isothermal section for the Cr-Hf-Nb system based on microstructural characterization of as-cast and heat-treated alloys. The microstructural characterization using x-ray diffractometry, scanning electron microscopy and electron probe microanalysis showed four eutectic-type monovariant reactions and two class II invariant reactions in the liquidus projection. The 1200 °C isothermal section showed complete solubility between Nb and Hf in (C15) phase and one three phase equilibria field.
Editor: Suécia
Data de criação/publicação: 2020
Formato: v. 41, p. 702-721..
Idioma: Inglês

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