Evaluation of the heat leakage in the thermal diffusivity measurement of molten metals by a laser flash method

被引：16

作者：

Nishi, T ^{[1
]}

Ohta, H

Shibata, H

Waseda, Y

机构：

[1] Tohoku Univ, Grad Sch, Dept Mat Proc, Sendai, Miyagi 9808577, Japan

[2] Ibaraki Univ, Dept Mat Sci, Hitachi, Ibaraki 3168511, Japan

[3] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

来源：

INTERNATIONAL JOURNAL OF THERMOPHYSICS | 2003年 / 24卷 / 06期

关键词：

heat loss; laser flash method; molten nickel; numerical analysis; thermal diffusivity;

D O I：

10.1023/B:IJOT.0000004102.55688.c7

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Evaluation of the radiative and conductive heat loss from a molten metal sample to the cell has been made in order to obtain accurate thermal diffusivities of molten metals at high temperature with a laser flash method. The results suggest that thermal diffusivity values of molten nickel can be determined in the temperature range from 1728 to 1928 K with an uncertainty of +/-3% in comparison with case considering only the effect of radiative heat loss. The usefulness of a cell for a laser flash method has been confirmed by applying simulated results to evaluate the heat leakage in the thermal diffusivity measurement of molten metals.

引用

页码：1735 / 1751

页数：17

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