The Yb–Si binary system was assessed using the CALPHAD method based on experimental data from the literature and a few new tensimetric measurements of the Yb activity in the liquid phase obtained by the Knudsen Effusion-Mass Spectrometry technique. A consistent thermodynamic description of the Yb–Si phases is presented: six intermediate phases (Yb5Si3, Yb5Si4, YbSi, Yb8Si11, Yb3Si5 and YbSi1.74), three solid solution phases (Yb-rich bcc and fcc, Si-rich diamond) and the liquid solution phase were considered in the assessment. The intermediate phases were treated as stoichiometric compounds, the solid solutions as ideal and the liquid solution phase by the Redlich–Kister formalism. The calculated phase diagram and thermodynamic properties are in good agreement with available experimental data.

Thermodynamic assessment of the Yb-Si system

BRUTTI, SERGIO;
2005

Abstract

The Yb–Si binary system was assessed using the CALPHAD method based on experimental data from the literature and a few new tensimetric measurements of the Yb activity in the liquid phase obtained by the Knudsen Effusion-Mass Spectrometry technique. A consistent thermodynamic description of the Yb–Si phases is presented: six intermediate phases (Yb5Si3, Yb5Si4, YbSi, Yb8Si11, Yb3Si5 and YbSi1.74), three solid solution phases (Yb-rich bcc and fcc, Si-rich diamond) and the liquid solution phase were considered in the assessment. The intermediate phases were treated as stoichiometric compounds, the solid solutions as ideal and the liquid solution phase by the Redlich–Kister formalism. The calculated phase diagram and thermodynamic properties are in good agreement with available experimental data.
File in questo prodotto:
File Dimensione Formato  
2005_calphad_YbSi.pdf

non disponibili

Tipologia: Documento in Post-print
Licenza: DRM non definito
Dimensione 491.84 kB
Formato Adobe PDF
491.84 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11563/27039
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 5
  • ???jsp.display-item.citation.isi??? 6
social impact