Phase equilibria in the system Al-Rh

Khoruzhaya, V. G.; Kornienko, K. E.; Martsenyuk, P. S.; Velikanova, Т. Ya.

doi:10.1007/s11106-006-0072-3

Cited by 18 publications

(11 citation statements)

References 6 publications

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“…In both AleRh and AleNi there are cascades of peritectics from the congruent equiatomic b-phases towards Al [5,6]. In the ternary compositional range the melting temperatures are higher at the AleRh side and vary from 2060 (for AlRh) to 640 C (for AleNi eutectic).…”

Section: Partial Isothermal Sectionsmentioning

confidence: 99%

An investigation of the Al–Ni–Rh phase diagram between 50 and 100at% Al

Przepiórzyński

Grushko

et al. 2007

Intermetallics

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The Al-rich part of AleNieRh was studied between 800 and 1080 C. The Al 9 Rh 2 phase was found to contain up to 8 at% Ni. The orthorhombic AleRh 3 6 -phase extends up to 17.5 at% Ni, high-temperature cubic C-Al 5 Rh 2 up to about 10 at% Ni while low-temperature hexagonal H-Al 5 Rh 2 extends up to 4 at% Ni. The Al 7 Rh 3 phases contained up to 3 at% Ni. The solubility of Rh in Al 3 Ni is up to 3 at% and in Al 3 Ni 2 up to 5 at%. The isostructural binary AlNi and AlRh phases probably form a continuous b-range of the CsCl-type solid solutions. A ternary hexagonal phase similar to Al 28 Ir 9 (a ¼ 1.213 and c ¼ 2.626 nm) was found to be formed between Al 76 Ni 4 Rh 20 and Al 76 Ni 13 Rh 11 . The formation of the high-temperature stable decagonal phase was confirmed. Another ternary phase, whose structure is not yet clarified, was revealed around Al 70 Ni 11 Rh 19 . Partial 1080, 1000, 900 and 800 C isothermal sections of the AleNieRh phase diagram are presented.

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Section: Partial Isothermal Sectionsmentioning

confidence: 99%

An investigation of the Al–Ni–Rh phase diagram between 50 and 100at% Al

Przepiórzyński

Grushko

et al. 2007

Intermetallics

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“…In accordance with the solidus surface, the liquidus surface contains fields of primary crystallization of solid solutions based on rhodium and phases based on binary compounds formed in the bounding binary Al-Rh and Ti-Rh systems: TiRh 3 (β) with an AuCu 3 -type structure, Ti 3 Rh 5 (γ) of a Ge 3 (Table 1). The presence of reflections from the δ phase lattice in x-ray patterns of as-cast alloys containing from 63.0 to 67.72 at.% Rh correlates with MSA data (Tables 1, 2).…”

Section: Resultsmentioning

confidence: 99%

“…The results were interpreted considering the nonequilibrium crystallization when bars are rapidly cooled down on the hearth of an arc furnace after smelting. The phase diagram of the bounding binary Ti-Rh system is based on compiled reference data [2], and that of the bounding binary Al-Rh system is based on previous experimental research [3].…”

Section: Introductionmentioning

confidence: 99%

Alloys and phase equilibria in the Al-Ti-Rh system. II. Melting diagram of the TiRh-Rh-AlRh partial system

Kornienko

Khoruzha

Martsenyuk

et al. 2007

Powder Metall Met Ceram

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Data on the solidus surface of the partial TiRh-Rh-AlRh system and results of metallography, x-ray diffraction, and differential thermal and electron microprobe analyses of its as-cast alloys are used to project the liquidus surface of this system onto the concentration triangle and examine the processes occurring in the crystallization of its alloys for the first time. This makes it possible to plot the melting diagram of the partial TiRh-Rh-AlRh system. Its liquidus surface is completed with four surfaces of primary crystallization of solid solutions based on rhodium and phases based on binary compounds formed in the bounding binary Al-Rh and Ti-Rh systems. In the partial TiRh-Rh-AlRh system, there are two invariant four-phase equilibria involving liquid; one of them is peritectic (at 1714°C) and the other is eutectic (at 1675°C). These four-phase equilibria also include five monovariant three-phase equilibria involving a liquid phase.

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“…Because of the isostructural nature and close lattice parameters (Δa ≈ 0.013 nm) of AlRh and high-temperature modification of TiRh in the bounding binary Al-Rh and Ti-Rh system [6,7], we assumed that there existed a continuous series of solid solutions with a CsCl-type structure. This permits partial triangulation of the ternary Al-TiRh system at the AlRh-TiRh section.…”

Section: Introductionmentioning

confidence: 99%

“…This paper focuses on the phase equilibria in the TiRh-Rh-AlRh partial system at subsolidus temperatures that are depicted on the solidus surface. The phase diagram of the bounding binary Ti-Rh system is constructed in compliance with the reference complied data [6] and of the bounding binary Al-Rh system in compliance with our previous experiments [7].…”

Section: Introductionmentioning

confidence: 99%

Alloys and phase equilibria in the Al-Ti-Rh system. I. Solidus surface of the TiRh-Rh-AlRh partial system

Kornienko

Khoruzha

Martsenyuk

et al. 2007

Powder Metall Met Ceram

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669.017: 5.715′295′235The data of metallography, x-ray diffraction, electron microprobe, and differential thermal analyses are used to project the solidus surface of the partial TiRh-Rh-AlRh system onto the concentration triangle for the first time. No ternary compounds are found in this system. It is established that there are four single-phase surfaces corresponding to the rhodium solid solution, phases based on Ti 3 Rh 5 and TiRh 3 compounds, and the δ phase (continuous series of solid solutions between isostructural CsCl-type AlRhbased phases and high-temperature modification of the TiRh-based phase). The solidus surface also contains five ruled surfaces bounding two-phase volumes and two isothermal planes that are constituents of invariant four-phase equilibria reached at 1714 and 1675°C, respectively.

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Phase equilibria in the system Al-Rh

Cited by 18 publications

References 6 publications

An investigation of the Al–Ni–Rh phase diagram between 50 and 100at% Al

An investigation of the Al–Ni–Rh phase diagram between 50 and 100at% Al

Alloys and phase equilibria in the Al-Ti-Rh system. II. Melting diagram of the TiRh-Rh-AlRh partial system

Alloys and phase equilibria in the Al-Ti-Rh system. I. Solidus surface of the TiRh-Rh-AlRh partial system

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