Hydrogen effect on the sigma-phase in Fe53.8Cr46.2

• Autor(es): Cieslak, J. ; Costa, B. F. O. ; Dubiel, S. M. ; Fruchart, D. ; Skryabina, N. E.
• Data: 2008
• Identificador Persistente: http://hdl.handle.net/10316/4337
• Origem: Estudo Geral - Universidade de Coimbra
• Assunto(s): Fe-Cr alloy; Metal hydride; Structure transformation
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

Investigation of the stability and properties of a sigma-phase type compound Fe53.8Cr46.2 after electrochemical hydrogen treatment was made using X-ray diffraction and 57Fe Mössbauer spectroscopy techniques. The amount of the hydrogen uptake was estimated to be equal to ~1.2H per unit formula, and its presence leads to an anisotropic cell parameter expansion. However, the hydrogenated state appears as metastable with reference to the aged samples analyzed a few days to months after loading with hydrogen. http://www.sciencedirect.com/science/article/B6TWY-4S08YHN-1/1/00dc3f759c4280f427dea80c5d6ad688