RuAl and its alloys, Part II: Mechanical properties, environmental resistance and applications

Phase formation of B2-RuAl during annealing of Ru/Al multilayers

“…Eqs. (1) and (2) show that the interdiffusion coefficient D ML can be smaller than D o if k/f 00 < 0 or larger than D o if k/f 00 > 0, respectively. For binary systems with negative heat of mixing like CuePd, CueAu, CoePt etc, k/f 00 is less than zero, because f 00 > 0 and k < 0 [44e46].…”

“…Good high-temperature strength is known and high creep resistance can be expected. Recent experiments indicated that B2-RuAl also shows excellent oxidation properties due to the formation of a thin protective Al 2 O 3 scale [2,10]. In addition, Tryon et al [11] reported that the thermal expansion coefficient of B2-RuAl is nearly equal to that of Al 2 O 3 , whereas the thermal expansion coefficient of B2-NiAl exceeds that of alumina about one order of magnitude.…”

Effects of composition and grain size on the interdiffusional behaviour in B2-RuAl intermetallic compound

“…The outstanding property profile of B2 type intermetallic aluminides makes this group of intermetallics interesting for high temperature applications [1][2][3]. However, a limiting factor for these applications is their high brittleness at room temperature (RT).…”

“…Additionally, RuAl with its extraordinary high melting point of 2333 K appears as a candidate material that exhibits high creep resistance (experimental verification is still lacking). Therefore, the RuAl intermetallic compound is a potential material for applications at high temperatures [2].…”

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

“…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.…”