학술논문
Phase equilibria of the Dy-Al-Si system at 500 °C.
Document Type
Article
Source
Subject
*PHASE equilibrium
*X-ray diffraction
*THERMAL analysis
*ELECTRON probe microanalysis
*INTERMETALLIC compounds
*ALUMINUM alloys
*RARE earth metal alloys
*SILICON alloys
*MOLECULAR structure
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Language
ISSN
1388-6150
Abstract
The isothermal section at 500 °C of the Dy-Al-Si system was studied in the whole concentration range. The alloys were characterized by X-ray powder diffraction, scanning electron microscopy and electron micro-probe analysis. A few samples were analysed by differential thermal analysis. The following intermetallic compounds, some of them showing variable composition, were found: DyAlSi (τ), hP5-CaAlO structure type, DyAlSi (τ) mS14-YAlSi structure type, DyAlSi (τ), 0 ≤ x ≤ 0.25, oI10-WCoB structure type and DyAlSi (τ), tI80-TbAlSi structure type. A number of binary phases dissolve the third element forming ternary solid solutions: Dy(AlSi), 0 ≤ x ≤ 0.5, hP16-NiTi structure type, Dy(AlSi), 0 ≤ x ≤ 0.1, oI12-GdSi structure type, Dy(AlSi), 0 ≤ x ≤ 0.2, oI12-GdSi structure type, DyAlSi, 0 ≤ x ≤ 0.2, oC8-CrB, and Dy(AlSi), 0 ≤ x ≤0.3, hP16-MnSi structure type. The melting point of DyAlSi was determined. [ABSTRACT FROM AUTHOR]