In situ transmission electron microscopy for ultrahigh temperature mechanical testing of ZrO2
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Nano Letters
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This work demonstrates a novel approach to
ultrahigh-temperature mechanical testing using a combination of
in situ nanomechanical testing and localized laser heating. The
methodology is applied to characterizing and testing initially
nanograined 10 mol % Sc2O3-stabilized ZrO2 up to its melting
temperature. The results suggest that the low-temperature strength
of nanograined, d < 50 nm, oxides is not influenced by creep.
Tensile fracture of ZrO2 bicrystals produce a weak-temperature
dependence suggesting that grain boundary energy dominates
brittle fracture of grain boundaries even at high homologous
temperatures; for example, T = 2050 °C or T ≈ 77% Tmelt. The
maximum temperature for mechanical testing in this work is
primarily limited by the instability of the sample, due to
evaporation or melting, enabling a host of new opportunities for testing materials in the ultrahigh-temperature regime.
Como referenciar
GROSSO, ROBSON L.; MUCCILLO, ELIANA N.S.; MUCHE, DERECK N.F.; JAWAHARRAM, GOWTHAM S.; BARR, CHRISTOPHER M.; MONTERROSA, ANTHONY M.; CASTRO, RICARDO H.R.; HATTAR, KHALID; DILLON, SHEN J. In situ transmission electron microscopy for ultrahigh temperature mechanical testing of ZrO2. Nano Letters, v. 20, n. 2, p. 1041-1046, 2020. DOI: 10.1021/acs.nanolett.9b04205. Disponível em: http://repositorio.ipen.br/handle/123456789/31089. Acesso em: 27 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.