Abstract
Surface modification, deuterium trapping, microstructure, hardness of tungsten – titanium alloys (W-5Ti) and reference tungsten (W) were investigated. All the specimens were exposed to deuterium plasma (100 eV) for 2 h and 4 h with a density of 1.8 × 1021 D (m−2 s−1) at 470 K. Surface blistering and D retention in tungsten is strongly suppressed by Ti doping. Two typical regions are observed on W-5Ti alloys, namely, W–Ti solid solute area and Ti-enriched region. Most of blisters appeared on Ti-enriched area while no blisters were observed on the W–Ti solid solute region. In addition, the hardness of W is significantly improved by Ti-doping.
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More From: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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