Helium, hydrogen, and fuzz in plasma-facing materials

KD Hammond - Materials Research Express, 2017 - iopscience.iop.org
Tungsten, the primary material under consideration as the divertor material in magnetic-
confinement nuclear fusion reactors, has been known for the last decade to form'fuzz'—a …

A review of surface damage/microstructures and their effects on hydrogen/helium retention in tungsten

YG Li, QR Zheng, LM Wei, CG Zhang, Z Zeng - Tungsten, 2020 - Springer
The change in surface damage/microstructures and its effects on the hydrogen (H)
isotope/helium (He) dynamic behavior are the key factors for investigating issues of tungsten …

Helium irradiation-induced ultrahigh hardening in niobium

JT Li, IJ Beyerlein, WZ Han - Acta Materialia, 2022 - Elsevier
In this work, using in-situ uniaxial tensile and compressive testing, microscopy, and
theoretical analysis, we study the mechanism underlying the ultrahigh irradiation hardening …

Hydrogen trapping, desorption and clustering in heterophase interfaces of W-ZrC alloy

Y Zhang, X Li, Y Xu, Y Lei, Z Xie, X Wang, Q Fang… - Acta Materialia, 2023 - Elsevier
Understanding the interaction of hydrogen (H) with defects has been recognized as a central
aspect in hydrogen-induced damages in metals. In this work, the role of coherent and semi …

Edge dislocation nucleation mechanism of surface blistering in tungsten exposed to deuterium plasma

W Guo, L Ge, Y Yuan, L Cheng, S Wang… - Nuclear …, 2018 - iopscience.iop.org
The mechanism of tungsten (W) blistering under deuterium (D) plasma exposure is still
under investigation. To clearly demonstrate the microstructure and nucleation mechanism of …

On the interactions of interstitial helium atom with helium bubble in tungsten: A molecular dynamics study

M Qiu, Q Hou, B Fu, J Cui - Journal of Nuclear Materials, 2022 - Elsevier
Tungsten (W) has been chosen as the primary plasma-facing material in nuclear fusion
reactors. However, when helium (He) ions are continuously irradiated, enormous amounts of …

Evolution of Dislocation Loops in 30 keV He+-Irradiated W–0.5% ZrC Alloys: In Situ TEM Observations and Molecular Dynamics Simulations

X Liu, Z Chen, H Wang, Y Li, Z Xie, X Liu… - ACS Applied Energy …, 2022 - ACS Publications
In situ irradiations with 30 keV He+ have been performed on W–0.5 wt% ZrC at 823 and
1073 K. Detailed characterization showed that the dislocation loops around the ZrC particles …

Characterization of dose dependent mechanical properties in helium implanted tungsten

WQ Chen, XY Wang, XZ Xiao, SL Qu, YZ Jia… - Journal of Nuclear …, 2018 - Elsevier
In this work, we utilized spherical nanoindentation to investigate the mechanical property
changes of helium (He) implanted tungsten (W) at different damage doses. According to the …

Dislocation climbing mechanism for helium bubble growth in tungsten

H Xie, K Xu, GH Lu, T Yu, F Yin - Scripta Materialia, 2018 - Elsevier
Molecular dynamics simulations were used to study the growth process of a He bubble on
an edge dislocation in W, and the results indicated that the growth was controlled by a …

Atomistic simulations of helium, hydrogen, and self-interstitial diffusion inside dislocation cores in tungsten

N Mathew, D Perez, E Martinez - Nuclear Fusion, 2020 - iopscience.iop.org
Tritium retention and microstructural modifications due to helium accumulation are two of the
main concerns regarding plasma-facing materials in fusion applications. Crystal defects in …