Elastic constants of dilute iron-silicon alloy single crystals below room temperature

Alberts, H. L.; Wedepohl, P T

doi:10.1016/0031-8914(71)90115-7

Cited by 20 publications

(5 citation statements)

References 9 publications

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“…The bulk sound velocity is defined as

where ρ is the density and K S is the adiabatic bulk modulus. The adiabatic bulk modulus of iron‐rich Fe‐Si alloys at ambient conditions can be calculated from ultrasonic measurements of the elasticity of these alloys [ Guinan and Beshers , 1968; Alberts and Wedepohl , 1971; Routbort et al , 1971; Machova and Kadeckova , 1977]. As shown in Figure 9, the adiabatic bulk modulus of the Fe‐Si alloys in the bcc structure is independent of the silicon content and the shear modulus increases slightly with increasing the silicon concentration in the iron‐rich Fe‐Si alloys.…”

Section: Discussionmentioning

confidence: 99%

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Static compression of iron‐silicon alloys: Implications for silicon in the Earth's core

et al. 2003

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) and V 0 = 6.887(±0.014) cm 3 /mol, and the K 0T of e-FeSi is 184.7 (±3.9) GPa with K 0 0T of 4.75 (±0.37) and V 0 = 6.790(±0.007) cm 3 /mol. Our study indicates that the substitution of Si into iron would lower the density of iron, but significantly changes its compressibility neither in the bcc phase, nor at high pressures in the hcp phase. Upon comparison with the Preliminary Reference Earth Model, the calculated equations of state (EOS) of hcp-Fe 85 Si 15 , using the Mie-Grüneisen EOS, indicate that an outer core containing about 8-10 wt.% Si and inner core containing about 4 wt.% Si in iron would satisfy the seismological constraints. Addition of silicon into iron increases the bulk sound velocity of iron, consistent with silicon being a light element in the Earth's core.

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“…The bulk sound velocity is defined as

Section: Discussionmentioning

confidence: 99%

“…Bulk sound velocities (open circles), compressional wave velocities (open diamonds), and shear wave velocities (open triangles) of iron‐rich Fe‐Si alloys calculated from ultrasonic measurements at ambient conditions [ Guinan and Beshers , 1968; Alberts and Wedepohl , 1971; Routbort et al , 1971; Machova and Kadeckova , 1977]. …”

Section: Discussionmentioning

confidence: 99%

Static compression of iron‐silicon alloys: Implications for silicon in the Earth's core

et al. 2003

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“…Here, for the sake of simplicity, we only consider the simple isotropic continuum approach. For Fe-3 wt.% Si and a diamond tip, E r is equal to 201 GPa [45]. The tip radius was found to be 1750 nm by fitting a Hertzian model to the elastic loading part of the L-D curves.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

Correlation between the hydrogen chemical potential and pop-in load during in situ electrochemical nanoindentation

Barnoush¹,

Kheradmand²,

Hajilou³

2015

Scripta Materialia

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“…3, in light of the published data. 4,8,[19][20][21][22][23] It is clear that Fe-Si alloys show smaller coupling factors than those of Fe-Ga and Fe-Ge alloys.…”

Section: Resultsmentioning

confidence: 99%

Magnetoelasticity of Fe–Si single crystals

Xing

Lograsso

2010

Journal of Applied Physics

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The tetragonal magnetostriction constant, (3/2)λ 100 , of Fe-Si single crystals was measured and was found to be structure dependent. Similar to that of Fe-Ge single crystals, (3/2)λ 100 is positive in the single phase A2 regime, becomes negative in the single phase D0 3 regime, and changes from positive to negative between the two regimes. Short-range order in the A2 regime decreases the magnetostriction prior to the onset of long range order. In the single phase regions of both A2 and D0 3 , thermal history does not show any obvious effect on the magnetostriction, contrary to that found for Fe-Ga alloys. However, in the regions of phase mixture involving A2, B2, and D0 3 phases, quenching pushes the change in magnetostriction from positive to negative to higher Si contents.

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Elastic constants of dilute iron-silicon alloy single crystals below room temperature

Cited by 20 publications

References 9 publications

Static compression of iron‐silicon alloys: Implications for silicon in the Earth's core

Static compression of iron‐silicon alloys: Implications for silicon in the Earth's core

Correlation between the hydrogen chemical potential and pop-in load during in situ electrochemical nanoindentation

Magnetoelasticity of Fe–Si single crystals

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