Effect of Ru on interdiffusion dynamics of β-NiAl/DD6 system: A combined experimental and first-principles studies

Zhang, Zhao; Bai, Bo; Peng, Hui; Gong, Shengkai; Guo, Hongbo

doi:10.1016/j.matdes.2015.09.041

Cited by 40 publications

(14 citation statements)

References 54 publications

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“…The hardness of alloys with rhenium exceeds the hardness of other alloys by 1.3-3.6 times. The composition with 2.5% of Y 2 O 3 has a minimum hardness, and the residual porosity thereof does not exceed 2.1%, whereas dispersed oxide particles can form rather coarse inclusions in the sintered material consisting of several (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) particles.…”

Section: Resultsmentioning

confidence: 99%

“…Intermetallic compounds based on the Ru-Al system are promising materials for the development of a new generation of heat-resistant alloys with a set of properties superior to modern analogs. As to compared to superalloys based on Ni and Fe, the alloys based on Ru-Al exhibit a higher thermodynamic stability, resistance with respect to oxidation and corrosion, and also a high melting point and high strength [1][2][3][4][5][6][7]. Powder metallurgy (PM) is one of the relatively inexpensive methods widely used in order to obtain articles made of materials that are difficult to deform, for example, ruthenium monoaluminide RuAl.…”

Section: Introductionmentioning

confidence: 99%

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Heat-Resistant RuAl-Based Alloys: Part II. Powder Alloys—Preparation via Reaction Sintering

Povarova

Морозов

Дроздов

et al. 2021

Inorg. Mater. Appl. Res.

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Refractory (T m = 2100°C), heat-resistant ruthenium monoaluminide RuAl, is lighter (ρ = 7.97 g/cm 3 ) than Ni superalloys, is considered a promising candidate material for operation in a high-temperature range and at relatively low loads within high-speed oxidizing gas flows at a temperature higher not only than operating temperature T op but also higher than the melting point T m inherent both in nickel superalloys and in nickel and titanium aluminides. Ruthenium aluminide RuAl is an ideal candidate for potential use in protective coatings too. In the second part of the paper, we have considered the possibilities for obtaining alloys based on RuAl directly from the initial ruthenium and aluminum powders via combining the temperaturetime modes of the reaction sintering (RS), as well as the sequence and intensity of pressure application under RS. In this case, no specialized equipment is required for obtaining initial powders with a given composition, and no restrictions are imposed on the particle size distribution in the initial powders.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heat-Resistant RuAl-Based Alloys: Part II. Powder Alloys—Preparation via Reaction Sintering

Povarova

Морозов

Дроздов

et al. 2021

Inorg. Mater. Appl. Res.

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show abstract

“…In addition, the interlayer 25 material may affect nucleation involved in the phase formation process by changing Gibbs volume energy terms when it is soluble in one of the phases involved in the reaction [12] or by changing interface energy terms when it segregates at interfaces [13]. Influencing the phase formation by an interlayer is not only interesting for con-tacts and interconnections in microelectronics, but also for many other engineering applications like protective coating in metallurgy [14], interlayer in diffusion welding [15] or intermetallic control in aeronautics [16,17].…”

Section: Introductionmentioning

confidence: 99%

Effect of a Ti diffusion barrier on the cobalt silicide formation: solid solution, segregation and reactive diffusion

et al. 2021

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Diffusion barriers play an important role in numerous phase formation processes. A well known example in microelectronics is the reactive diffusion growth of silicide thin films which are applied as contact materials. In this work, the effect of a Ti interlayer on the kinetics of the formation of CoSi by reactive diffusion is investigated. Therefore, Co(100 nm)/Ti(5 nm) deposited on Si( 111) is annealed at various temperatures. Transmission electron microscopy and atom probe tomography allow to study the evolution of microstructure and local compositions after each annealing.

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“…In metallurgy, a diffusion barrier is a thin layer of metal usually placed between two other metals in order to protect either one of the metals from modifying the other [1]. In aeronautics, the diffusion barrier may come from the segregation of a impurities contained in one of the materials and it could limit the growth of intermetallic [2] [3].…”

Section: Introductionmentioning

confidence: 99%

Reactive diffusion in the presence of a diffusion barrier: Experiment and model

Mangelinck

Luo

Girardeaux

2018

Journal of Applied Physics

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Reactions in thin film and diffusion barriers are important for applications such as protective coatings, electrical contact and interconnections. In this work the effect of a barrier on the kinetics of the formation for a single phase by reactive diffusion is investigated from both experimental and modeling point of view. Two types of diffusion barriers are studied: (i) a thin layer of W deposited between a Ni film and the Si substrate and (ii) Ni alloy films, Ni(1%W) and Ni(5%Pt), that form a diffusion barrier during the reaction with the Si substrate. The effect of the barriers on the kinetics of -Ni2Si formation is determined by in situ X ray diffraction and compared to models that explain the kinetics slowdown induced by both types of barrier. A linear parabolic growth is found for the deposited barrier with an increasing linear contribution for increasing barrier thickness. On the contrary, the growth is mainly parabolic for the barrier formed by reaction between an alloy film and the substrate. The permeability of the two types of barrier are determined and discussed. The developed models fit well with the dedicated model experiments, leading to a better understanding of the barrier effect on the reactive diffusion and allowing to predict the barrier behaviour in various applications.

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Effect of Ru on interdiffusion dynamics of β-NiAl/DD6 system: A combined experimental and first-principles studies

Cited by 40 publications

References 54 publications

Heat-Resistant RuAl-Based Alloys: Part II. Powder Alloys—Preparation via Reaction Sintering

Heat-Resistant RuAl-Based Alloys: Part II. Powder Alloys—Preparation via Reaction Sintering

Effect of a Ti diffusion barrier on the cobalt silicide formation: solid solution, segregation and reactive diffusion

Reactive diffusion in the presence of a diffusion barrier: Experiment and model

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