RuAl and its alloys. Part I. Structure, physical properties, microstructure and processing

Mücklich, Frank; Ilić, Nikola

doi:10.1016/j.intermet.2004.05.005

Cited by 68 publications

(44 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A detailed description of the properties of RuAl based intermetallics can be found in a recent review published by Mücklich and Ilić [9]. Particularly single phase RuAl shows an extraordinary resistance against oxidation at high temperature, due to the formation of a protective Al 2 O 3 scale [10].…”

Section: Introductionmentioning

confidence: 99%

Influence of the microstructure on the formation of alumina scales on near stoichiometric RuAl produced by arc melting

et al. 2005

Self Cite

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Influence of the microstructure on the formation of alumina scales on near stoichiometric RuAl produced by arc melting

et al. 2005

Self Cite

View full text Add to dashboard Cite

“…The diffusion coefficient of Ru in RuAl is not available in the literature. However, an approximate diffusion coefficient value of (2.4 ± 1.3) × 10 -13 cm 2 /s of Al in RuAl has been estimated at 1000 qC [6]. It is expected that the diffusion coefficient of ruthenium in RuAl is lower than that of the aluminium in RuAl [6].…”

Section: Microstructure Of the Milled Powdermentioning

confidence: 96%

“…However, an approximate diffusion coefficient value of (2.4 ± 1.3) × 10 -13 cm 2 /s of Al in RuAl has been estimated at 1000 qC [6]. It is expected that the diffusion coefficient of ruthenium in RuAl is lower than that of the aluminium in RuAl [6]. Annealing at 1450 qC for 8 h might have been insufficient for any comparable diffusion of ruthenium from the 120 nm sized Ru crystallites into the surrounding RuAl phase.…”

Section: Microstructure Of the Milled Powdermentioning

confidence: 99%

“…However, their applications in high temperatures are impeded by their poor ambient temperature ductility and fracture toughness. Reports by Fleischer et al [1,2], Wolff et al [3][4][5]7], and Mücklich et al [6] have highlighted the promising properties of ruthenium aluminide (RuAl) alloys in high temperature structural applications. RuAl has a B2 (CsCl) crystal structure similar to the NiAl system and exhibits an unusual combination of a high resistance to environmental corrosion in some very severe chemical media [7], a very high melting point (2050 qC), a high strength at room and elevated temperatures, along with room temperature ductility and toughness.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of nano-crystalline RuAl by mechanical alloying

2007

View full text Add to dashboard Cite

Nano-crystalline RuAl was synthesised by mechanical alloying. The evolution of the nano-crystalline RuAl phase during the mechanical alloying process using ruthenium and aluminium powders was studied. During the milling process, the peaks corresponding to reflections from the aluminium planes disappeared. The variation of crystallite size and microstrain with milling time was evaluated using X-ray diffraction (XRD) patterns. Though the XRD results showed the formation of a RuAl phase after 7 h of milling, scanning electron microscopy studies revealed that the RuAl phase was formed after 2 h of milling. The analysis revealed that average crystallite sizes of 17 and 120 nm were obtained for RuAl and Ru phases, respectively, during the milling process. Density value of 97 % of the theoretical value was obtained for the milled powder mixture after cold compaction and sintering.

show abstract

“…17 The product phase B2-RuAl is one of the few intermetallic compounds with substantial room temperature ductility. 18,19 As indicators for high energy density, we determined (1) the net velocity by following the front propagation in high-speed videos and (2) the peak temperature of the reaction via the measurement of the temporal temperature evolution. For the latter measurements, we used a one-color high-speed pyrometer.…”

mentioning

confidence: 99%

Numerical modeling of self-propagating reactions in Ru/Al nanoscale multilayer foils

Woll

Gunduz

Pauly

et al. 2015

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

The Ru/Al system integrates high energy density and high product ductility and serves as an alternative for utilization as nanoscale reactive multilayer. We present a modeling study that relates the Ru-Al phase transformations occurring during self-propagating reactions with macroscopic reaction parameters such as net front velocity and reaction temperature. We coupled equations for mass and thermal transport and used a numerical scheme to solve the differential equations. We calculated the temporal evolution of the temperature distribution in the reaction front as a function of the multilayer bilayer thickness. The calculated net velocities were between 4.2 m/s and 10.8 m/s, and maximal reaction temperatures were up to 2171 K, in good agreement with measured data. Interfacial premixing, estimated to be around 4 nm, had a large influence on reaction velocities and temperature at smaller bilayer thicknesses. Finally, the theoretical results of the present study help to explain the experimental findings and guide tailoring of reactive properties of Ru/Al multilayers for applications.

show abstract

RuAl and its alloys. Part I. Structure, physical properties, microstructure and processing

Cited by 68 publications

References 73 publications

Influence of the microstructure on the formation of alumina scales on near stoichiometric RuAl produced by arc melting

Influence of the microstructure on the formation of alumina scales on near stoichiometric RuAl produced by arc melting

Synthesis of nano-crystalline RuAl by mechanical alloying

Numerical modeling of self-propagating reactions in Ru/Al nanoscale multilayer foils

Contact Info

Product

Resources

About