The data show that the contention devices with the highest flexibility are the TTS and the Ribbond THM as they exhibit a lower energy variation needed for splint deformation compared with the other materials that were examined.
A novel ternary phase, SnyNi4Sb12−xSnx, has been characterized and
found to exhibit a wide range of homogeneity (at 250 °C, 2.4 ≤ x ≤ 5.6, 0 ≤ y ≤ 0.31; at 350 °C, 2.7 ≤ x ≤ 5.0, 0 ≤ y ≤ 0.27).
SnyNi4Sb12−xSnx crystallizes in a skutterudite-based structure in which Sn atoms are
found to occupy two crystallographically inequivalent sites: (a) Sn and Sb atoms
randomly share the 24g site; and (b) a small fraction of Sn atoms occupy the 2a (0, 0, 0)
position, with an anomalously large isotropic atomic displacement parameter.
Eu0.8Ni4Sb5.8Sn6.2, Yb0.6Ni4Sb6.7Sn5.3 and Ni4As9.1Ge2.9 are isotypic
skutterudites. Depending on the particular composition, metallic as well
as semiconducting states appear. The crossover from semiconducting to
metallic behaviour is discussed in terms of a temperature-dependent carrier
concentration employing a simple model density of states with the Fermi
energy slightly below a narrow energy gap. This model accounts for the
peculiar temperature-dependent electrical resistivity. These skutterudites are
characterized by a number of lattice vibrations, which were elucidated
by Raman measurements and compared to the specific heat data. The
Eu-containing compound exhibits long-range magnetic order at Tmag ≈ 6 K,
arising from the Eu2+ ground state.
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