Bubble

Quantum mechanics

Anisotropy

Linguistics

Engineering

Philosophy

Fusion power

Liquid bubble

Metallurgy

Materials science

Nuclear physics

Tungsten

Thermal conductivity

Plasma

Parallel computing

Thermal diffusivity

Computer science

Rhenium

Thermodynamics

Physics

Nuclear engineering

Fusion

Optics

Thermal

Composite material

Dispersion (optics)

Thermal conduction

Fusion Engineering and Design

Tungsten is a promising candidate for plasma-facing materials in a fusion reactor, and several research studies have been conducted to improve the mechanical properties of pure W. However, the thermal properties are also important characteristics of plasma-facing materials. In this study, the thermal properties of pure W and its alloys were measured, and the effect of alloying on the thermal properties of pure W was investigated. Potassium-bubble (K-bubble) dispersion, which is one of the major methods utilized to improve the mechanical properties of W, did not affect the thermal diffusivity and conductivity of pure W. On the other hand, the presence of rhenium, which is major alloying element of W, affected the absolute values and the temperature dependence of thermal diffusivity and conductivity. The effect of alloying on specific heat and the anisotropy in thermal diffusivity of pure W and its alloys were also investigated. Measurements of the specific heat showed that K-bubble dispersion and Re addition had insignificant effects on the values obtained for pure W. Anisotropy in thermal diffusivity was not observed, and the effect of anisotropic grain structure and alloying was insignificant.

Thermal properties of pure tungsten and its alloys for fusion applications