Article ID Journal Published Year Pages File Type
1331402 Journal of Solid State Chemistry 2013 13 Pages PDF
Abstract

The solid state phase equilibria of the Al–Cr–Ho ternary system at 500 °C were experimentally investigated. The phase relations at 500 °C are governed by 14 three-phase regions, 29 two-phase regions and 15 single-phase regions. The existences of 10 binary compounds and 2 ternary phases have been confirmed. Al11Cr2, Al11Cr4 and Al17Ho2 were not found at 500 °C. Crystal structures of Al9Cr4 and Al8Cr4Ho were determined by the Rietveld X-ray powder data refinement. Al9Cr4 was found to exhibit cubic structure with space group I4̄3m (no. 217) and lattice parameters a=0.9107(5) nm. Al8Cr4Ho crystallizes in ThMn12 structure type with space group I4/mmm (no. 139) and lattice parameters a=0.8909(4) nm, c=0.5120(5) nm. It is concluded that the obtained Al4Cr phase in this work should be μ-Al4Cr by comparing with XRD pattern of the hexagonal μ-Al4Mn compound.

Graphical abstractThe solid state phase equilibria of the Al–Cr–Ho ternary system at 500 °C. Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Al–Cr–Ho system has been investigated. ► Al9Cr4 has cubic structure with space group I4̄3m. ► Al8Cr4Ho crystallizes in ThMn12 type with space group I4/mmm. ► Al4Cr phase is μ-type at 500 °C.

Related Topics
Physical Sciences and Engineering Chemistry Inorganic Chemistry
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