Details

Autor(en) / Beteiligte

• Chen, Taili
• Guo, Cuiping
• Li, Changrong
• Du, Zhenmin

Titel

Experimental investigation and thermodynamic description of the Pr–Fe–B system

Ist Teil von

• Journal of magnetism and magnetic materials, 2020-03, Vol.497, p.165983, Article 165983

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •The liquidus surface projection of the Pr–Fe–B system was investigated.•The Pr–B and Pr–Fe–B systems were optimized using CALPHAD method.•A set of self-consistent thermodynamic parameters of the Pr–Fe–B system was obtained. The microstructures and phase transformation temperatures of the as-cast Pr–Fe–B alloys were tested by means of scanning electron microscopy (SEM) with energy dispersive spectrometer (EDS), X-Ray diffraction (XRD) and differential thermal analysis (DTA). The primary solidification region of the Pr–B system with B-contents 30–45 at.% and liquidus surface projection of the Pr–Fe–B system with B-content lower than 20 at.% were investigated. The primary solidification regions of PrB4 in the Pr–B system and fcc(Fe), Fe2B, Pr2Fe14B and Pr1.1Fe4B4 in the Pr–Fe–B system were determined. The liquid composition of the peritectic reaction liq. + PrB4 → Pr2B5 in the Pr–B system was determined between 35 and 32 at.% B. The temperature of the eutectic reaction liq. → Fe2B + Pr2Fe14B + Pr1.1Fe4B4 was determined. Based on the present experimental and literature results, the Pr–B and Pr–Fe–B systems were optimized with CALPHAD method. A set of self-consistent thermodynamic parameters of the Pr–Fe–B system was obtained, and the experimental phase relations, especially phase relations around the hard magnetic Pr2Fe14B phase, were reproduced well.