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The isothermal section of the La–Si–Mg system at 500 ∘C AITranslate

S. De Negri; A. Saccone; S. Delfino;
Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova;Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova;Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova
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Publisher: Elsevier
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Abstract AITranslate

The isothermal section of the La–Si–Mg system at 500 ∘C was constructed in the whole concentration range by means of the SEM-EDXS and XRPD characterization of about forty alloys prepared by induction melting and then annealed. Phase equilibria are characterized by the following ternary phases: τ1-La2+xSi2Mg1−x (0≤x≤0.35,tP10-Mo2FeB2), τ2-LaSi2Mg2 (tP5-CeSi2Mg2), τ3-LaSi2Mg (structure still unknown) and τ4-La6SiMg23 (cF120-Zr6SiZn23). The high temperature binary phase LaMg2 (cF24-MgCu2) has been found to be stabilized at 500 ∘C probably by a small amount of Si. Phases in binary subsystems do not generally form extended ternary solid solutions except for (La1−xMgx)3Si2 (0≤x≤0.167,tP10-U3Si2). Crystal structures of phases τ1-La2+xSi2Mg1−x and (La1−xMgx)3Si2 are correlated, the former being a substitution derivative of the latter.

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DOI：https://doi.org/10.1016/j.calphad.2008.07.012

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The isothermal section of the La–Si–Mg system at 500 ∘C was constructed in the whole concentration range by means of the SEM-EDXS and XRPD characterization of about forty alloys prepared by induction melting and then annealed. Phase equilibria are characterized by the following ternary phases: τ1-La2+xSi2Mg1−x (0≤x≤0.35,tP10-Mo2FeB2), τ2-LaSi2Mg2 (tP5-CeSi2Mg2), τ3-LaSi2Mg (structure still unknown) and τ4-La6SiMg23 (cF120-Zr6SiZn23). The high temperature binary phase LaMg2 (cF24-MgCu2) has been found to be stabilized at 500 ∘C probably by a small amount of Si. Phases in binary subsystems do not generally form extended ternary solid solutions except for (La1−xMgx)3Si2 (0≤x≤0.167,tP10-U3Si2). Crystal structures of phases τ1-La2+xSi2Mg1−x and (La1−xMgx)3Si2 are correlated, the former being a substitution derivative of the latter.

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GB/T 7714-2015 [1] S. De Negri, A. Saccone, S. Delfino. Calphad, 2009(33). DOI:10.1016/j.calphad.2008.07.012.
MLA [1] S. De Negri, et al., Calphad, no. 33, 2009, https://doi.org/10.1016/j.calphad.2008.07.012.
APA [1] S. De Negri, A. Saccone, & S. Delfino. (2009). Calphad(33). https://doi.org/10.1016/j.calphad.2008.07.012
IEEE [1] S. De Negri, A. Saccone, and S. Delfino, Calphad, no. 33, 2009, doi: 10.1016/j.calphad.2008.07.012.