Experimental investigation of phase equilibria in the Mg-rich corner of Mg-Nd-Sc system
Phase equilibria in the Mg-rich corner of Mg–Nd–Sc ternary system was studied by using the equilibrated alloys method. The partial isothermal sections at 500 °C, 530 °C, and 550 °C were constructed by analyzing the phase constitution and the chemical compositions of the present phases in 19 alloy sa...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/abd2f5 |
| _version_ | 1797746846709317632 |
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| author | Zhixiang Xia Guanglong Xu Xiaoma Tao Jiang Wang Yuwen Cui |
| author_facet | Zhixiang Xia Guanglong Xu Xiaoma Tao Jiang Wang Yuwen Cui |
| author_sort | Zhixiang Xia |
| collection | DOAJ |
| description | Phase equilibria in the Mg-rich corner of Mg–Nd–Sc ternary system was studied by using the equilibrated alloys method. The partial isothermal sections at 500 °C, 530 °C, and 550 °C were constructed by analyzing the phase constitution and the chemical compositions of the present phases in 19 alloy samples. The Mg _3 (Mg, Nd, Sc) phase exhibited noticeable ternary solubility introduced by the solid solution of Mg and Sc in the Mg _3 Nd lattice. (Mg_hcp) showed a narrow homogeneity range paralleling to Mg–Sc binary boundary, whereas Mg _41 Nd _5 showed negligible ternary solubility at all three temperatures. The three-phase equilibrium region of (Mg_hcp) + Mg _41 Nd _5 + Mg _3 (Mg, Nd, Sc) dominated the Mg-rich corner and was surrounded by three two-phase equilibrium regions constituted by any two of above three phases. The primary crystals and the solidification pathways of alloys in the Mg-rich corner were analyzed via the as-cast microstructure. The matrix phases of (MgSc_bcc) and/or (Mg_hcp) together with the precipitations of Mg _3 (Mg, Nd, Sc) and other ordering structures could provide additional space to optimize microstructure and properties of Sc-alloyed Mg–Nd alloys. |
| first_indexed | 2024-03-12T15:42:36Z |
| format | Article |
| id | doaj.art-eb61080259664fde855de40d0f70bcdf |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:42:36Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-eb61080259664fde855de40d0f70bcdf2023-08-09T15:54:44ZengIOP PublishingMaterials Research Express2053-15912020-01-018101650210.1088/2053-1591/abd2f5Experimental investigation of phase equilibria in the Mg-rich corner of Mg-Nd-Sc systemZhixiang Xia0Guanglong Xu1https://orcid.org/0000-0002-5367-7918Xiaoma Tao2https://orcid.org/0000-0003-3804-7819Jiang Wang3Yuwen Cui4Tech Institute of Advanced Materials & College of Materials Science and Engineering, Nanjing Tech University , Nanjing, 211816, People’s Republic of ChinaTech Institute of Advanced Materials & College of Materials Science and Engineering, Nanjing Tech University , Nanjing, 211816, People’s Republic of ChinaSchool of Physics Science and Technology, Guangxi University , Nanning, 530004, People’s Republic of ChinaGuangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology , Guilin, 541004, People’s Republic of ChinaTech Institute of Advanced Materials & College of Materials Science and Engineering, Nanjing Tech University , Nanjing, 211816, People’s Republic of ChinaPhase equilibria in the Mg-rich corner of Mg–Nd–Sc ternary system was studied by using the equilibrated alloys method. The partial isothermal sections at 500 °C, 530 °C, and 550 °C were constructed by analyzing the phase constitution and the chemical compositions of the present phases in 19 alloy samples. The Mg _3 (Mg, Nd, Sc) phase exhibited noticeable ternary solubility introduced by the solid solution of Mg and Sc in the Mg _3 Nd lattice. (Mg_hcp) showed a narrow homogeneity range paralleling to Mg–Sc binary boundary, whereas Mg _41 Nd _5 showed negligible ternary solubility at all three temperatures. The three-phase equilibrium region of (Mg_hcp) + Mg _41 Nd _5 + Mg _3 (Mg, Nd, Sc) dominated the Mg-rich corner and was surrounded by three two-phase equilibrium regions constituted by any two of above three phases. The primary crystals and the solidification pathways of alloys in the Mg-rich corner were analyzed via the as-cast microstructure. The matrix phases of (MgSc_bcc) and/or (Mg_hcp) together with the precipitations of Mg _3 (Mg, Nd, Sc) and other ordering structures could provide additional space to optimize microstructure and properties of Sc-alloyed Mg–Nd alloys.https://doi.org/10.1088/2053-1591/abd2f5Mg–Nd–Sc alloyisothermal sectionphase equilibriasolid solubility |
| spellingShingle | Zhixiang Xia Guanglong Xu Xiaoma Tao Jiang Wang Yuwen Cui Experimental investigation of phase equilibria in the Mg-rich corner of Mg-Nd-Sc system Materials Research Express Mg–Nd–Sc alloy isothermal section phase equilibria solid solubility |
| title | Experimental investigation of phase equilibria in the Mg-rich corner of Mg-Nd-Sc system |
| title_full | Experimental investigation of phase equilibria in the Mg-rich corner of Mg-Nd-Sc system |
| title_fullStr | Experimental investigation of phase equilibria in the Mg-rich corner of Mg-Nd-Sc system |
| title_full_unstemmed | Experimental investigation of phase equilibria in the Mg-rich corner of Mg-Nd-Sc system |
| title_short | Experimental investigation of phase equilibria in the Mg-rich corner of Mg-Nd-Sc system |
| title_sort | experimental investigation of phase equilibria in the mg rich corner of mg nd sc system |
| topic | Mg–Nd–Sc alloy isothermal section phase equilibria solid solubility |
| url | https://doi.org/10.1088/2053-1591/abd2f5 |
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