AI Article Synopsis
- A series of tests on tungsten nanopillars at various temperatures were conducted using advanced microscopy techniques to observe their behavior under compression.
- Surface oxidation was noted to increase with temperature, affecting the mechanical properties of the tungsten pillars.
- The findings suggest a connection between the oxidation and plastic deformation processes, drawing parallels with the growth of tungsten fuzz observed in environments exposed to helium plasma.
Article Abstract
A series of nanopillar compression tests were performed on tungsten as a function of temperature using in situ transmission electron microscopy with localized laser heating. Surface oxidation was observed to form on the pillars and grow in thickness with increasing temperature. Deformation between 850 °C and 1120 °C is facilitated by long-range diffusional transport from the tungsten pillar onto adjacent regions of the YO-stabilized ZrO indenter. The constraint imposed by the surface oxidation is hypothesized to underly this mechanism for localized plasticity, which is generally the so-called whisker growth mechanism. The results are discussed in context of the tungsten fuzz growth mechanism in He plasma-facing environments. The two processes exhibit similar morphological features and the conditions under which fuzz evolves appear to satisfy the conditions necessary to induce whisker growth.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8467130 | PMC |
| http://dx.doi.org/10.3390/nano11092429 | DOI Listing |
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