An investigation of the B2 phase between AlRu and AlNi in the Al–Ni–Ru ternary system

Hörner, Igor; Hall, Norris F.; Cornish, L.A.; Witcomb, M. J.; Cortie, Michael B.; Boniface, T.D.

doi:10.1016/s0925-8388(97)00279-x

Cited by 37 publications

(31 citation statements)

References 13 publications

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“…In an effort to drive down both cost and weight and improve upon its other properties, several studies [4][5][6] have looked at alloying schemes for replacing Ru or A1 with other elements that generally form an isostructural B2 phase such as Co and Fe for Ru and Ti for AI. But by far, the most widely studied ternary alloying addition has been Ni [7][8][9][10][11][12][13]. Even then, there is disagreement as to the structure of ternary Ni-Ru-A1 alloys that exist between the NiA1 and RuA1 B2-phase fields.…”

Section: Introductionmentioning

confidence: 99%

Atomistic modeling of RuAl and (RuNi)Al alloys

et al. 2003

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Section: Introductionmentioning

confidence: 99%

Atomistic modeling of RuAl and (RuNi)Al alloys

et al. 2003

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“…Since NiAl and RuAl both have B2 crystal structures, phase equilibria and the possibility of a miscibility gap in the ternary system have been of interest. [10][11][12][13][14][15][16][17] Based on a recent experimental study of the Ru-Al-Ni ternary system at the temperatures of 1000 and 1100°C, [17] the two B2 phases form a continuous solid solution. A Ru-Al-Ni isotherm at 1100°C is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Ternary Diffusion in a RuAl-NiAl Couple

Kulkarni

Tryon

Pollock

et al. 2007

J Phs Eqil and Diff

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A ternary diffusion couple assembled with NiAl and RuAl disks and annealed at 1100°C was examined by scanning electron microscopy and analyzed for concentration profiles by electron microprobe analysis. Complete mutual solid solubility with continuous variations in compositions was observed between the binary B2 aluminides. Ternary interdiffusion coefficients were determined with the aid of a program called MultiDiFlux over two composition ranges, one Ru-rich and the other Ni-rich, within the diffusion zone. The interdiffusion coefficient, " D Al RuRu varies little with variation in composition, but the interdiffusion coefficient, " D Al NiNi decreases by an order of magnitude from the Ni-rich region to the Ru-rich region. " D Al NiNi is larger than " D Al RuRu in the Ni-rich region by an order of magnitude. The cross coefficients, " D Al NiRu and " D Al RuNi , are both positive. " D Al NiRu is comparable in magnitude to the main coefficient " D AlNiNi in the Ni-rich region; hence, Ni interdiffusion flux is enhanced down a Ru concentration gradient but decreased against it. Similarly, Ni interdiffusion is reduced down Al gradients. Characteristic depth parameters calculated for Ni and Ru are larger on the NiAl side than on the RuAl side. Approximate calculations of cumulative intrinsic diffusion fluxes past a Kirkendall plane suggest that the atomic mobility of Ni is larger than that of Ru.

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“…The phase equilibria in the Ni-Al-Ru system have been studied by a number of investigators [80Tsu,85Cha,85Pet,86Cha,97Har,97Hor,97Horl,98Hor,0OHoh]. Most of these investigations have focused on solid-state phase equilibria.…”

Section: Introduction Research Objective and Progressmentioning

confidence: 99%

Thermodynamic Descriptions of NI Alloys Containing AL, CR, and RU: A Computational Thermodynamic Approach Coupled with Experiments

Chang¹

2006

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of informatio including suggestions for reducing the burden, Shortly after initiating this program, we focused our effort to develop thermodynamic descriptions of ternary Ni-Cr-Ru and Ni-AI-Ru including the constituent binaries when needed using the traditional Calphad approach. In addition, we extended our effort to include the use of the Cluster/Site Approximation (CSA) to describe the fcc phases in the disordered and ordered states such as the prototype Cu-Ag-Au in 2003/2004 and then / ' in real ternary systems in 2004/2005. In the meantime, we began to explore the possibility of using CSA to calculate interphase boundary (IPB) energies of coherent interfaces such as those for / 'ix prototype Cu-Au binary and then real binaries such as Ni-Al. The preliminary results on CSA-calculated prototype Cu-Ag-Au diagrams and IPB energies on prototype Cu-Au and Ni-Al were presented at the 2004 annual review meeting at Wintergreen, VA We subsequently discussed with Dr. C. Hartley about our IPB energy effort and were encouraged to continue this research effort as part of our program. In the meantime, we began to explore the possibility of using CSA to calculate interphase boundary (IPB) energies of coherent interfaces such as those for 7/y in prototype Cu-Au binary and then real binaries such as Ni-Al. The preliminary results on CSA-calculated prototype Cu-Ag-Au diagrams and IPB energies on prototype Cu-Au and Ni-Al

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An investigation of the B2 phase between AlRu and AlNi in the Al–Ni–Ru ternary system

Cited by 37 publications

References 13 publications

Atomistic modeling of RuAl and (RuNi)Al alloys

Atomistic modeling of RuAl and (RuNi)Al alloys

Ternary Diffusion in a RuAl-NiAl Couple

Thermodynamic Descriptions of NI Alloys Containing AL, CR, and RU: A Computational Thermodynamic Approach Coupled with Experiments

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