TY - JOUR
T1 - Thermal conductivities of molten iron, cobalt, and nickel by laser flash method
AU - Nishi, Tsuyoshi
AU - Shibata, Hiroyuki
AU - Ohta, Hiromichi
AU - Waseda, Yoshio
N1 - Funding Information:
We are grateful to Professor S. Suzuki, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, for his help in providing pure iron sample, and are grateful to Professor S. Sridhar, Carnegie Mellon University, for his helpful suggestion. This work is supported by Special Coordination Funds for Promoting Science and Technology (Promotion System for Intellectual Infrastructure of Research and Development, “Research on Measurement Technology and Reference Materials for Thermophysical Properties of Solids”), Japan, and a Grant-in-Aid for Scientific Research (Grant No. 13750683-00) of the Ministry of Education, Culture, Sports, Science and Technology, Japan.
PY - 2003/12
Y1 - 2003/12
N2 - New attempts were made for the measurement of thermal diffusivity of molten iron, cobalt, and nickel at temperatures close to 1900 K by a laser flash method. A simple but useful sample cell system was developed to keep the molten metal shape uniform for a given thickness. It is also necessary to consider the effect of not only the radiative heat loss but also the conductive heat loss at the interface between the molten metal sample and the sample cell material under the present experimental conditions. The conductive heat loss was found, through computational simulation, to be negligibly small for the present laser flash measurements. Thermal conductivity values of molten iron, cobalt, and nickel were calculated by combining the present thermal diffusivity data with specific heat and density, and the resulting values are given in the following equations (unit: W m-1 K-1) λFe = 2.15 × 10-2 (T - 1818) + 33.3 1818 ≤ T ≤ 1868 (unit: K) λCo = 2.79 × 10-2 (T - 1768) + 30.4 1768 ≤ T ≤ 1838 (unit: K) λNi = 2.30 × 10-2 (T - 1728) + 53.0 1728 ≤ T ≤ 1908 (unit: K).
AB - New attempts were made for the measurement of thermal diffusivity of molten iron, cobalt, and nickel at temperatures close to 1900 K by a laser flash method. A simple but useful sample cell system was developed to keep the molten metal shape uniform for a given thickness. It is also necessary to consider the effect of not only the radiative heat loss but also the conductive heat loss at the interface between the molten metal sample and the sample cell material under the present experimental conditions. The conductive heat loss was found, through computational simulation, to be negligibly small for the present laser flash measurements. Thermal conductivity values of molten iron, cobalt, and nickel were calculated by combining the present thermal diffusivity data with specific heat and density, and the resulting values are given in the following equations (unit: W m-1 K-1) λFe = 2.15 × 10-2 (T - 1818) + 33.3 1818 ≤ T ≤ 1868 (unit: K) λCo = 2.79 × 10-2 (T - 1768) + 30.4 1768 ≤ T ≤ 1838 (unit: K) λNi = 2.30 × 10-2 (T - 1728) + 53.0 1728 ≤ T ≤ 1908 (unit: K).
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U2 - 10.1007/s11661-003-0181-2
DO - 10.1007/s11661-003-0181-2
M3 - Article
AN - SCOPUS:3242734804
SN - 1073-5623
VL - 34
SP - 2801
EP - 2807
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 12
ER -