Phase diagram of the system chromium-germanium

A thermodynamic description of the Cr–Ge system

“…The dotted line represents the calculated magnetic temperature of bcc in this system. (b) Calculated Cr-Ge phase diagram using polynomial temperature dependence and Kaptay equation [20] with the experimental data [2][3][4][5][6][7][8]. The dotted line represents the calculated magnetic temperature in this system with the experimental data determined by Booth et al [10].…”

“…The first complete Cr-Ge phase diagram was determined by Zagryazhskii et al [2], in which only Cr3Ge was formed congruently, and other intermetallic compounds, Cr5Ge3, Cr11Ge8, CrGe and Cr11Ge19, were formed by a series of peritectic reactions. Svechnikov and Kobzenko [3] and Kobzenko [4] reported that Cr3Ge melts incongruently and a miscibility gap of liquid exists at about 20-26 at.% Ge.…”

Thermodynamic assessments of the V–Ge and V–Pt systems

“…The phase diagram in the VeGe system was originally proposed by Svechnikov et al [10] and Savitskii et al [11]. The intermediate phases were investigated by several researchers [12e16], however, different conclusions for the congruent melting of the V 3 Ge compound were Table 1 The stable solid phases and the used models in the VeGe and VePt systems System Phase Strukturbericht designation Prototype Modeling phase Used models [17]: 1900e2000 C; and Waterstrat [18]: 1920 AE 10 C. Savitskii et al [11] presented the peritectic reaction (L þ V 5 Ge 3 4 V 11 Ge 8 ) at 1575 AE 10 C, this reaction temperature is lower than the corresponding temperature reported by Svechnikov et al [10]. Based on the above experimental information, Smith [19] reviewed the phase diagram of the VeGe system, with slight changes in compositions and temperatures, as shown in Fig.…”

“…3. The calculated phase diagram of the VeGe system compared with experimental data [10,11,17,18]. Ref.…”

“…Kleppa and Jung [22] reported an experimental data for the standard enthalpy of formation of the V 5 Ge 3 compound by high-temperature calorimetry, and estimated the standard enthalpies of formation for the other three phases (V 3 Ge, V 11 Ge 8 and V 17 Table 2 Optimized thermodynamic parameters of the VeGe system Table 3 Optimized thermodynamic parameters of the VePt system Pt:Pt À 0 G fcc Pt ¼ þ2030 0 G PtV3 V:Pt À 0:75 0 G fcc Pt À 0:25 0 G bcc V ¼ þ11; 500 þ 1:19T 0 G PtV3 Pt:V À 0:25 0 G fcc Pt À 0:75 0 G bcc V ¼ À20; 500 À 1:…”