Ordering behaviour of Ni-5 at.% Al alloy

Modeling of lattice parameter in the Ni-Al system

“…The same situation appears in the room-temperature data in Figure 7, where the values reported by Bottiger et al are smaller than other available data. [33][34][35]58] Since Bottiger's investigation was performed on thin-film samples from sputtering, their results are likely to be influenced by several processing factors. For example, Bottiger et al found that a higher sputtering pressure will reduce the lattice parameter.…”

“…Fig. 7-Room-temperature lattice parameter of the ␥ phase in the Ni-Al system (᭺, [31] , ✚, [33] I, [34] ✳, [35] , [36] ᭜, [48] , ଝ [51] and ϫ [58] ). The solid line represents the results of the the model calculation (S N ϭ 6.4 ϫ 10 Ϫ3 Å).…”

“…[31][32][33][34][35][36][37] Most of those values were measured at room temperature on samples quenched from high temperatures. The temperature dependence of the lattice parameter of Ni-Al alloys was investigated by Kamara et al [32] using high-temperature X-ray diffractometry.…”

Order–disorder transformation in the Ni–4.49at.% Al alloy

“…Ayub et al [2] studied the ordering behavior of Ni-5 at.% Al alloy and observed that the tensile strength is related to a magnetic transformation at 220 • C. They also observed that the local order phase changes significantly affect the * Corresponding author.…”

“…These are usually determined in terms of short-range order, long-range order, clustering or Guinier-Preston Zones. These ordering parameters are determined directly from X-rays or neutron diffraction experiments, and may be discussed qualitatively by measuring the variation of hardness, resistivity and magnetic properties of these alloys with temperature [2].…”