Multifold stiffness and fracture toughness enhancement in W‐doped VO 2 microcrystals
Vanadium dioxide is popular for the metal‐insulator phase transition at 68°C. Chemical doping is one of the effective ways adopted to tune the phase transition temperature, where tungsten is known to reduce the transition temperature of VO 2 . This work investigates the effect of tungsten doping on...
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Veröffentlicht in: | Journal of the American Ceramic Society 2023-07, Vol.106 (7), p.4321-4328 |
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Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Vanadium dioxide is popular for the metal‐insulator phase transition at 68°C. Chemical doping is one of the effective ways adopted to tune the phase transition temperature, where tungsten is known to reduce the transition temperature of VO
2
. This work investigates the effect of tungsten doping on the mechanical properties of VO
2
microcrystals and their polymer composites. Doping of VO
2
with W shows a systematic reduction in phase transition temperature up to 33°C for 4 wt% W‐doped VO
2
. For 3 wt% W‐doped VO
2
, the elastic modulus values enhance by 50%. The fracture toughness of 3 wt% W‐doped VO
2
shows an enhancement of fourfold compared to the undoped VO
2
. The dynamic compressive strength of 3 wt% W‐doped VO
2
–UHMWPE polymer composite at room temperature is found to be 7% higher than the undoped VO
2
—composite. |
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ISSN: | 0002-7820 1551-2916 |
DOI: | 10.1111/jace.19075 |