High temperature resistivity and thermo-EMF of RuAl

First-principle studies of Al–Ru intermetallic compounds

“…Based on scanning and transmission electron microscopies, powder X-ray diffraction and differential thermal analyses, Al-rich part of the AleRu phase diagram was reinvestigated by Mi et al in 2003 [7]. According to their experimental results, an orthorhombic Al 5 Ru 2 phase was found to be formed at 1492 C by a peritectic reaction of Al 2 Ru with the liquid and to decompose at 1340 C to Al 2 Ru and Al 13 Ru 4 .…”

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

“…5%) observed after the annealing of the RuAl sample with the smallest crystal size is in accordance with the previous argumentation. The compositional and temperature (293 -673 K) dependence of the thermo-emf in RuAl alloys was studied by Smith and Lang [16]. A maximum in the thermo-emf was observed for Ru 54.2 Al 45.8 alloy (, 11 mV/K at 293 K), the same composition for which a minimum of electrical resistance was observed.…”

“…Smith and Lang [16] reported that among a range of the investigated RuAl alloys a minimum electrical resistivity (e.g. R , 15 mV/cm at 293 K) was observed for Ru 54.2 Al 45.8 alloy at all investigated temperatures.…”

“…The electrical resistivity ðRÞ of RuAl and its alloys was investigated as a function of composition and temperature [15,16]. Smith and Lang [16] reported that among a range of the investigated RuAl alloys a minimum electrical resistivity (e.g.…”

“…It is a well known fact that the main concern in the development of intermetallics is the improvement of a room temperature ductility and toughness [13,14], because the inherent brittleness of most of the intermetallics is the greatest obstacle for their application. Finally, the thermal and electrical conductivity [3,15,16] comparable to pure metals, and excellent oxidation and corrosion resistance [3,17 -19] make this novel intermetallic an exceptional material.…”