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- W2078750087 abstract "Diffusion of iron and nickel in an Fe64Ni36 alloy was measured via the use of focused-ion-beam (FIB) milling and energy dispersive x-ray spectroscopy (EDX) to 65 GPa and ∼2200 K. The experiments were performed using a combination of micro-fabricated samples in the laser-heated diamond-anvil cell (DAC), increasing the pressure range for experimentally determined interdiffusion coefficients in FeNi alloys by >40 GPa. Diffusivity in the iron–nickel system follows a homologous temperature relationship D=D0 exp(−19.3(2.7)Tm/T) where D0 is 4.6(7)×10−4 m2 s−1, with zero-pressure activation energy, 301(40) kJ mol−1, consistent with measurements at lower pressures. At inner core conditions, this predicts an inner core solid-state diffusivity of 1×10−14 m2 s−1 (Tm/T=0.95), with an inner core viscosity of 1020–1022 Pa s assuming power-law creep (n=3) with a deviatoric stress of 103–104 Pa." @default.
- W2078750087 created "2016-06-24" @default.
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- W2078750087 date "2012-10-01" @default.
- W2078750087 modified "2023-10-16" @default.
- W2078750087 title "Interdiffusion of Earth's core materials to 65GPa and 2200K" @default.
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- W2078750087 doi "https://doi.org/10.1016/j.epsl.2012.06.053" @default.
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