The constitution of the Ni-Al-Ru system

Chakravorty, S.; West, D. R. F.

doi:10.1007/bf00551479

Cited by 46 publications

(37 citation statements)

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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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“…Ruthenium, being a platinum group metal, has a high weight density, which obviously limits its applications in jet and gas turbine engines. On the other hand, NiAl and RuAl have the same crystal structure ͑B2͒ and, according to the phase diagram, 4 they form a continuous ͑Ru,Ni͒Al solid solution. In order to circuit the highdensity problem, one should try the opportunity to partially substitute Ni for Ru.…”

mentioning

confidence: 99%

Ab initio calculations of elastic properties of Ru1−xNixAl superalloys

Bleskov

Смирнова

Vekilov

et al. 2009

Applied Physics Letters

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Ab initio total energy calculations based on the exact muffin-tin orbitals method, combined with the coherent potential approximation, have been used to study the thermodynamical and elastic properties of substitutional refractory Ru1−xNixAl alloys. We have found that the elastic constants C′ and C11 exhibit pronounced peculiarities near the concentration of about 40 at. % Ni, which we ascribe to electronic topological transitions. Our suggestion is supported by the Fermi surface calculations in the whole concentration range. Results of our calculations show that one can design Ru–Ni–Al alloys substituting Ru by Ni (up to 40 at. %) with almost invariable elastic constants and reduced density.

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“…We first used the traditional Calphad approach to model this system, i.e., the disordered y-(Ni) phase and the ordered Y-(Ni,Ru) 3 A1 phase were treated as two different phases. During the optimization of model parameters, we found that it was very difficult to maintain the phase relationships at 1273K reported by Chakravorty and West [86Cha]. The Y-(Ni,Ru) 3 A1 phase tends to be in equilibrium with the 5-(Ru) phase.…”

Section: Introduction Research Objective and Progressmentioning

confidence: 86%

“…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%

“…Obtaining a thermodynamic description of this ternary has been extremely challenging due to the complex phase equilibria and a lack of extensive and internally consistent experimental data. For the phase equilibrium data, we have relied primarily on the isothermal sections obtained by Chakravorty and West [86Cha] and we did try to use other earlier published data in our effort to obtain a thermodynamic description but it was impossible to achieve internal consistency. The only enthalpy of formation data available in this system is that of Jung and Kleppa for 13-RuAl [92Jun].…”

Section: Introduction Research Objective and Progressmentioning

confidence: 99%

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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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The constitution of the Ni-Al-Ru system

Cited by 46 publications

References 10 publications

Atomistic modeling of RuAl and (RuNi)Al alloys

Atomistic modeling of RuAl and (RuNi)Al alloys

Ab initio calculations of elastic properties of Ru1−xNixAl superalloys

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

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