Experimental and thermodynamic assessment of the Co–Gd–Ti system. (September 2016)

• Record Type: Journal Article
• Authors: Mattern, N.; Zinkevich, M.; Han, J.H.; Löser, W.
• Is Part Of: Calphad. Volume 54(2016)
• Page Start: 144
• Page End: 157
• Publication Date: 2016-09
• Subjects: Co-Gd–Ti -- Phase diagram -- CALPHAD -- Thermodynamic assessment -- In situ X-ray diffraction -- Gd(Co, Ti)12 phase; Phase diagrams -- Data processing -- Periodicals; Thermochemistry -- Data processing -- Periodicals; Diagrammes de phases -- Informatique -- Périodiques; Thermochimie -- Informatique -- Périodiques; Thermodynamica; Electronic journals; 541.363
• DOI: 10.1016/j.calphad.2016.07.005
• Languages: English
• ISSNs: 0364-5916

Abstract

Abstract: The ternary phase diagram Co–Gd–Ti was experimentally assessed. An isothermal section at T =773 K is presented. The phase equilibria for Co-contents <70 at% are characterized by the coexistence of the binary terminal phases with low solubility of the respective third element. For higher Co-contents one ternary phase GdCo12− x Ti x (S.G. I4/mmm) exists with a homogeneity range of 1≤ x ≤2. The liquid phase of the ternary system exhibits a miscibility gap originating from the binary Gd–Ti subsystem, which extends beyond 30 at% Co. Based on the experimental data, a thermodynamic description is derived. Graphical abstract: fx1 Highlights: The Co–Gd–Ti phase diagram is experimentally assessed. An isothermal section at T= 773 K is presented. The ternary phase GdCo12− x Ti x has a homogeneity range of 1≤ x ≤2. The miscibility gap of the Gd–Ti liquid extends beyond 30 at% Co. A thermodynamic description of the Co-Gd–Ti system is derived.