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Plasma-Material Interaction Data Set 84
Diffusivity of H in W
$$
D = D_0 \exp\left(-\frac{E_\mathrm{d}}{k_\mathrm{B}T}\right)
$$
[In the above formula, the Boltzmann constant is expressed in \(\mathrm{eV\,K^{-1}}\).]
- Material: W
- Material composition: 99.95 wt%
- Method: Theory
- Data scaled for isotope mass? No
- D0 = 4.1e-07 m2 s-1
- Ed = 0.390(90) eV
- T = 1120 – 2080 K
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- B26: R. Frauenfelder, "Solution and Diffusion of Hydrogen in Tungsten
", Journal of Vacuum Science and Technology 6, 388-397 (1969). [10.1116/1.1492699]
Comment
Data provided by M. Lavrentiev (UKAEA, 2024) with permission from STEP.