Thermal Conductivity

Thermal Conductivity (THCD) of HEAs can be calculated using Thermo-Calc and with the TCS High Entropy Alloys Database (TCHEA). You can calculate the quantities of a phase φ such as FCC or BCC with the variables THCD(φ), or a system (i.e. alloy) with barely THCD. You can also calculate the derived quantities, i.e. thermal resistivity (THRS) and thermal diffusivity (THDF) in a similar way.

The database includes thermal conductivity (THCD) starting with version 5.0 (TCHEA5).

Thermal conductivity of equiatomic FCC medium- and high-entropy alloys at various temperatures.

Figure 1: Thermal conductivity of equiatomic FCC medium- and high-entropy alloys at various temperatures. Curves represent calculations while symbols for experimental data from different literature. Each alloy (composition) is assigned a specific color.

Thermal conductivity of AlxCoCrFeNi high-entropy alloys at various temperatures.

Figure 2: Thermal conductivity of AlxCoCrFeNi high-entropy alloys at various temperatures. Curves represent (freeze-in) calculations while symbols for experimental data (of as-homogenized alloys at 1373 K) from the literature [2009Chou]. The notation e.g. “Al_1.25, BCC” implies the experimental series for the alloy Al1.25CoCrFeNi with BCC structure.

References

[2009Chou] H.-P. Chou, Y.-S. Chang, S.-K. Chen, J.-W. Yeh, Microstructure, thermophysical and electrical properties in AlxCoCrFeNi (0≤x≤2) high-entropy alloys. Mater. Sci. Eng. B. 163, 184–189 (2009).

[2016Lee] J. I. Lee, H. S. Oh, E. S. Park, Manipulation of σ y /κ ratio in single phase FCC solid-solutions. Appl. Phys. Lett. 109, 061906 (2016).

[2017Jin] K. Jin, S. Mu, K. An, W. D. Porter, G. D. Samolyuk, G. M. Stocks, H. Bei, Thermophysical properties of Ni-containing single-phase concentrated solid solution alloys. Mater. Des. 117, 185–192 (2017).