Thermophysical measurements on iron above 1500 K using a transient (subsecond) technique

Cezairliyan, A.; McClure, J. L.

doi:10.6028/jres.078a.001

Cited by 24 publications

(13 citation statements)

References 2 publications

(2 reference statements)

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“…Since the reported electrical resistivity (r e ) for similar composition (Fe-0.06C-0.4Mn) is close to that of Fe with difference of 0.8%, 49) the C p of Fe-C and Fe-C-Mn in a solid phase was calculated with same ε T of solid Fe. In γ-phase region, the obtained C p values of Fe, Fe-C, and Fe-C-Mn in solid phases are consistent with reported values 39,45,46,50) (Fig. 6(b)).…”

Section: Resultssupporting

confidence: 91%

“…As shown in Fig. 6(a), the ε T of Fe was calculated by using the values of electrical resistivity in literatures, [44][45][46][47][48] and increases from 0.215 at 1 200 K to 0.25 at 1 600 K. From the measured C p /ε T in the γ-phase region (inset of Fig. 6(b)) and calculated emissivity, the C p of Fe was deduced, which increases with temperature ( Fig.…”

Section: Resultsmentioning

confidence: 99%

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Non-Contact Measurement of Thermophysical Properties of Fe, Fe–C, and Fe–C–Mn Alloys in Solid, Supercooled, and Stable Liquid Phases

Jeon

Kang

et al. 2016

ISIJ Int.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Non-Contact Measurement of Thermophysical Properties of Fe, Fe–C, and Fe–C–Mn Alloys in Solid, Supercooled, and Stable Liquid Phases

Jeon

Kang

et al. 2016

ISIJ Int.

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“…We used the following melting temperatures for data evaluation: nickel: 1728 K [5], iron: 1808 K [6], and platinum: 2042 K [7].…”

Section: Resultsmentioning

confidence: 99%

Combined DSC and Pulse-Heating Measurements of Electrical Resistivity and Enthalpy of Platinum, Iron, and Nickel

Wilthan

Cagran

Pottlacher

2004

International Journal of Thermophysics

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Measurements of the enthalpy, electrical resistivity, and specific heat capacity as a function of temperature starting from the solid state up into the liquid phase for Fe, Ni, and Pt are presented. Two different measurement approaches have been used within this work: an ohmic pulse-heating technique, which allows -among others -the measurement of enthalpy, specific heat capacity, and electrical resistivity up to the end of the stable liquid phase, and a differential-scanning-calorimetry technique (DSC) which enables determination of specific heat capacity from near room temperature up to 1500 K. The microsecond ohmic pulse-heating technique uses heating rates up to 10 8 K·s −1 and thus is a dynamic measurement, whereas the differential-scanning-calorimetry technique uses heating rates of typically 20 K·min −1 and can be considered as a quasi-static process. Despite the different heating rates both methods give good agreement of the thermophysical data within the stated uncertainties of each experiment. Results on the metals Fe, Ni, and Pt are reported. The enthalpy and resistivity data are presented as a function of temperature and compared to literature values.

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“…al. 27 The temperature range, slopes, and intercepts of the fits are in Table I. (b) High-temperature resistivity data for polycrystalline rare earth metals compiled from Ref.…”

Section: Fig 2 Electrical Resistivity Data Taken From Experiment (A)mentioning

confidence: 99%

“…Deviations from linearity are, however, rather common. Consider the resistivity measurements for Fe, [25][26][27] which are assembled in Fig. 2a.…”

Section: Electrical Resistivity Of Fe and Gdmentioning

confidence: 99%

Deviations from Matthiessen's rule and resistivity saturation effects in Gd and Fe from first principles

2014

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According to earlier first-principles calculations, the spin-disorder contribution to the resistivity of rare-earth metals in the paramagnetic state is strongly underestimated if Matthiessen's rule is assumed to hold. To understand this discrepancy, the resistivity of paramagnetic Fe and Gd is evaluated by taking into account both spin and phonon disorder. Calculations are performed using the supercell approach within the linear muffin-tin orbital method. Phonon disorder is modeled by introducing random displacements of the atomic nuclei, and the results are compared with the case of fictitious Anderson disorder. In both cases the resistivity shows a nonlinear dependence on the square of the disorder potential, which is interpreted as a resistivity saturation effect. This effect is much stronger in Gd than in Fe. The non-linearity makes the phonon and spin-disorder contributions to the resistivity non-additive, and the standard procedure of extracting the spin-disorder resistivity by extrapolation from high temperatures becomes ambiguous. An "apparent" spin-disorder resistivity obtained through such extrapolation is in much better agreement with experiment compared to the results obtained by considering only spin disorder. By analyzing the spectral function of the paramagnetic Gd in the presence of Anderson disorder, the resistivity saturation is explained by the collapse of a large area of the Fermi surface due to the disorder-induced mixing between the electronic and hole sheets.

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Thermophysical measurements on iron above 1500 K using a transient (subsecond) technique

Cited by 24 publications

References 2 publications

Non-Contact Measurement of Thermophysical Properties of Fe, Fe–C, and Fe–C–Mn Alloys in Solid, Supercooled, and Stable Liquid Phases

Non-Contact Measurement of Thermophysical Properties of Fe, Fe–C, and Fe–C–Mn Alloys in Solid, Supercooled, and Stable Liquid Phases

Combined DSC and Pulse-Heating Measurements of Electrical Resistivity and Enthalpy of Platinum, Iron, and Nickel

Deviations from Matthiessen's rule and resistivity saturation effects in Gd and Fe from first principles

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