{"title":"Al-Fe-Pr 三元体系的 500 °C 等温段","authors":"R. Freccero, L. Arrighi, G. Cacciamani, P. Riani","doi":"10.1007/s11669-024-01117-8","DOIUrl":null,"url":null,"abstract":"<p>Phases and equilibria involved in the isothermal section at 500 °C of the ternary Al-Fe-Pr system have been here investigated in the whole composition range by means of X-ray diffraction, optical and scanning electron microscopy, and electron probe microanalysis. Phase equilibria are characterised by the formation of two binary solid solutions, Pr<sub>2</sub>(Fe<sub>x</sub>Al<sub>1−x</sub>)<sub>17</sub> with 0.34 ≤ <i>x</i> ≤ 1.00 (<i>hR</i>57–Th<sub>2</sub>Zn<sub>17</sub>) and Pr(Fe<sub>x</sub>Al<sub>1−x</sub>)<sub>2</sub> with 0 ≤ <i>x</i> ≤ 0.20 (<i>cF</i>24–Cu<sub>2</sub>Mg), and four ternary compounds, τ<sub>1</sub>-PrFe<sub>2</sub>Al<sub>10</sub> (<i>oS</i>52-YbFe<sub>2</sub>Al<sub>10</sub>), τ<sub>2</sub>-PrFe<sub>2</sub>Al<sub>8</sub> (<i>oP</i>44-CeFe<sub>2</sub>Al<sub>8</sub>), τ<sub>3</sub>-Pr(Fe<sub>x</sub>Al<sub>1−x</sub>)<sub>12</sub> with 0.28 ≤ <i>x</i> ≤ 0.44 (<i>tI</i>26-ThMn<sub>12</sub>) and τ<sub>4</sub>-Pr<sub>6</sub>(Fe<sub>x</sub>Al<sub>1−x</sub>)<sub>14</sub> with 0.63 ≤ <i>x</i> ≤ 0.81 (<i>tI</i>80-La<sub>6</sub>Co<sub>11</sub>Ga<sub>3</sub>), which have been confirmed. The solid solubility ranges of the binary and ternary compounds have been considered and trends of their lattice parameters studied. The complete isothermal section has been obtained and the general features of the section are discussed and compared with those of other ternary systems of light R (La, Ce, Pr, Nd, Sm) with Al and Fe.</p>","PeriodicalId":657,"journal":{"name":"Journal of Phase Equilibria and Diffusion","volume":null,"pages":null},"PeriodicalIF":1.5000,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The 500 °C Isothermal Section of the Al-Fe-Pr Ternary System\",\"authors\":\"R. Freccero, L. Arrighi, G. Cacciamani, P. Riani\",\"doi\":\"10.1007/s11669-024-01117-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Phases and equilibria involved in the isothermal section at 500 °C of the ternary Al-Fe-Pr system have been here investigated in the whole composition range by means of X-ray diffraction, optical and scanning electron microscopy, and electron probe microanalysis. Phase equilibria are characterised by the formation of two binary solid solutions, Pr<sub>2</sub>(Fe<sub>x</sub>Al<sub>1−x</sub>)<sub>17</sub> with 0.34 ≤ <i>x</i> ≤ 1.00 (<i>hR</i>57–Th<sub>2</sub>Zn<sub>17</sub>) and Pr(Fe<sub>x</sub>Al<sub>1−x</sub>)<sub>2</sub> with 0 ≤ <i>x</i> ≤ 0.20 (<i>cF</i>24–Cu<sub>2</sub>Mg), and four ternary compounds, τ<sub>1</sub>-PrFe<sub>2</sub>Al<sub>10</sub> (<i>oS</i>52-YbFe<sub>2</sub>Al<sub>10</sub>), τ<sub>2</sub>-PrFe<sub>2</sub>Al<sub>8</sub> (<i>oP</i>44-CeFe<sub>2</sub>Al<sub>8</sub>), τ<sub>3</sub>-Pr(Fe<sub>x</sub>Al<sub>1−x</sub>)<sub>12</sub> with 0.28 ≤ <i>x</i> ≤ 0.44 (<i>tI</i>26-ThMn<sub>12</sub>) and τ<sub>4</sub>-Pr<sub>6</sub>(Fe<sub>x</sub>Al<sub>1−x</sub>)<sub>14</sub> with 0.63 ≤ <i>x</i> ≤ 0.81 (<i>tI</i>80-La<sub>6</sub>Co<sub>11</sub>Ga<sub>3</sub>), which have been confirmed. The solid solubility ranges of the binary and ternary compounds have been considered and trends of their lattice parameters studied. The complete isothermal section has been obtained and the general features of the section are discussed and compared with those of other ternary systems of light R (La, Ce, Pr, Nd, Sm) with Al and Fe.</p>\",\"PeriodicalId\":657,\"journal\":{\"name\":\"Journal of Phase Equilibria and Diffusion\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.5000,\"publicationDate\":\"2024-07-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Phase Equilibria and Diffusion\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1007/s11669-024-01117-8\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Phase Equilibria and Diffusion","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s11669-024-01117-8","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
摘要
本文通过 X 射线衍射、光学和扫描电子显微镜以及电子探针显微分析，研究了三元 Al-Fe-Pr 体系在 500 ℃ 等温截面中涉及的相位和平衡。相平衡的特点是形成了两种二元固溶体：Pr2(FexAl1-x)17（0.34 ≤ x ≤ 1.00）（hR57-Th2Zn17）和 Pr(FexAl1-x)2（0 ≤ x ≤ 0.20（cF24-Cu2Mg），以及四种三元化合物：τ1-PrFe2Al10（oS52-YbFe2Al10）、τ2-PrFe2Al8（oP44-CeFe2Al8）、τ3-Pr(FexAl1-x)12（0.28≤x≤0.44（tI26-ThMn12）和 0.63≤x≤0.81（tI80-La6Co11Ga3）的 τ4-Pr6(FexAl1-x)14 已得到证实。考虑了二元和三元化合物的固体溶解度范围，并研究了其晶格参数的变化趋势。得到了完整的等温截面，讨论了该截面的一般特征，并将其与其他轻 R（La、Ce、Pr、Nd、Sm）与 Al 和 Fe 的三元体系的等温截面进行了比较。
The 500 °C Isothermal Section of the Al-Fe-Pr Ternary System
Phases and equilibria involved in the isothermal section at 500 °C of the ternary Al-Fe-Pr system have been here investigated in the whole composition range by means of X-ray diffraction, optical and scanning electron microscopy, and electron probe microanalysis. Phase equilibria are characterised by the formation of two binary solid solutions, Pr2(FexAl1−x)17 with 0.34 ≤ x ≤ 1.00 (hR57–Th2Zn17) and Pr(FexAl1−x)2 with 0 ≤ x ≤ 0.20 (cF24–Cu2Mg), and four ternary compounds, τ1-PrFe2Al10 (oS52-YbFe2Al10), τ2-PrFe2Al8 (oP44-CeFe2Al8), τ3-Pr(FexAl1−x)12 with 0.28 ≤ x ≤ 0.44 (tI26-ThMn12) and τ4-Pr6(FexAl1−x)14 with 0.63 ≤ x ≤ 0.81 (tI80-La6Co11Ga3), which have been confirmed. The solid solubility ranges of the binary and ternary compounds have been considered and trends of their lattice parameters studied. The complete isothermal section has been obtained and the general features of the section are discussed and compared with those of other ternary systems of light R (La, Ce, Pr, Nd, Sm) with Al and Fe.
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The most trusted journal for phase equilibria and thermodynamic research, ASM International''s Journal of Phase Equilibria and Diffusion features critical phase diagram evaluations on scientifically and industrially important alloy systems, authored by international experts.
The Journal of Phase Equilibria and Diffusion is critically reviewed and contains basic and applied research results, a survey of current literature and other pertinent articles. The journal covers the significance of diagrams as well as new research techniques, equipment, data evaluation, nomenclature, presentation and other aspects of phase diagram preparation and use.
Content includes information on phenomena such as kinetic control of equilibrium, coherency effects, impurity effects, and thermodynamic and crystallographic characteristics. The journal updates systems previously published in the Bulletin of Alloy Phase Diagrams as new data are discovered.
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