The synthesis of nickel aluminides by multilayer self-propagating combustion

In situ transmission electron microscopy investigation of the interfacial reaction between Ni and Al during rapid heating in a nanocalorimeter

“…20 For multilayers with a 1:1 Al:Ni atomic ratio, slow heating experiments typically have identified two phase transformation sequences depending on the deposition method. For evaporated Al/Ni multilayers, 14,21 the phase transformation sequence under slow heating is…”

Combustion of heterogeneous nanostructural systems (Review)

“…It was also shown that the dependence of the reaction wave propagation velocity on the thickness of the layers in metal-aluminum systems reached the maximum value if the total thickness of two layers of the reagents (A + B) was 25-30 nm. A decrease in the burning rate with increasing thickness of the layers for Ni/Al and 3Ni/Al compositions was noted in [107].…”

“…As was shown [109], in a wide range of variations of the individual layer thicknesses (from 50 μm) to 50 nm) and burning rates (from 0.5 to 5 m/sec), the experimental points on gasless combustion in the Ni-Al system reported in different papers, including [106,107] mentioned above, are well approximated by a straight line in the coordinates U b = F (1/δ); the calculation based on the slope of this straight line by Eq. (1) yields D L ≈ 10 −5 cm 2 /sec.…”

Natural convection and solid phase combustion

“…Ma et al [1990] studied direct combustion of multilayered samples [Ni and Al layers 10_20 nm thick], and velocities of 400 cm/s were measured. Dyer et al [1994], Dyer andMunir [1995], and Weihs [1997] easured velocities of 60_200 cm/s for multilayered samples prepared by electron beam evaporation and sputtering. Change in the stoichiometry of the layered samples of Ni:Al from 1:1 to 3:1 decreased the velocities.…”