Univ. of Illinois at Urbana-Champaign, IL (United States); Energy and Nuclear Research Inst., Sao Paul (Brazil); Univ. of California, Davis, CA (United States)
Sun Yat-sen Univ., Zhuhai (China)
Energy and Nuclear Research Inst., Sao Paul (Brazil)
Univ. of California, Davis, CA (United States)
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
This study demonstrates novel in situ transmission electron microscopy-based microscale single grain boundary Coble creep experiments used to grow nanowires through a solid-state process in cubic ZrO2 between ≈ 1200 °C and ≈ 2100 °C. Experiments indicate Coble creep drives the formation of nanowires from asperity contacts during tensile displacement, which is confirmed by phase field simulations. The experiments also facilitate efficient measurement of grain boundary diffusivity and surface diffusivity. 10 mol% Sc2O3 doped ZrO2 is found to have a cation grain boundary diffusivity of $$D_{gb} = (0.056 ± 0.05)exp (\frac{-380,000±41,000}{RT})m^2 s^{-1}$$, and $$D_s = (0.10 ± 0.27)exp(\frac{-380,000 ± 28,000}{RT}) m^2 s^{-1}$$.
Vikrant, K. S.N., et al. "Ultrahigh temperature <em>in situ</em> transmission electron microscopy based bicrystal coble creep in zirconia I: Nanowire growth and interfacial diffusivity." Acta Materialia, vol. 199, Aug. 2020. https://doi.org/10.1016/j.actamat.2020.08.069
Vikrant, K. S.N., Grosso, Robson L., Feng, Lin, Muccillo, Eliana N.S., Muche, Dereck N.F., Jawaharram, Gowtham S., Barr, Christopher M., Monterrosa, Anthony M., Castro, Ricardo H.R., García, R. Edwin, Hattar, Khalid, & Dillon, Shen J. (2020). Ultrahigh temperature <em>in situ</em> transmission electron microscopy based bicrystal coble creep in zirconia I: Nanowire growth and interfacial diffusivity. Acta Materialia, 199. https://doi.org/10.1016/j.actamat.2020.08.069
Vikrant, K. S.N., Grosso, Robson L., Feng, Lin, et al., "Ultrahigh temperature <em>in situ</em> transmission electron microscopy based bicrystal coble creep in zirconia I: Nanowire growth and interfacial diffusivity," Acta Materialia 199 (2020), https://doi.org/10.1016/j.actamat.2020.08.069
@article{osti_1667414,
author = {Vikrant, K. S.N. and Grosso, Robson L. and Feng, Lin and Muccillo, Eliana N.S. and Muche, Dereck N.F. and Jawaharram, Gowtham S. and Barr, Christopher M. and Monterrosa, Anthony M. and Castro, Ricardo H.R. and García, R. Edwin and others},
title = {Ultrahigh temperature <em>in situ</em> transmission electron microscopy based bicrystal coble creep in zirconia I: Nanowire growth and interfacial diffusivity},
annote = {This study demonstrates novel in situ transmission electron microscopy-based microscale single grain boundary Coble creep experiments used to grow nanowires through a solid-state process in cubic ZrO2 between ≈ 1200 °C and ≈ 2100 °C. Experiments indicate Coble creep drives the formation of nanowires from asperity contacts during tensile displacement, which is confirmed by phase field simulations. The experiments also facilitate efficient measurement of grain boundary diffusivity and surface diffusivity. 10 mol% Sc2O3 doped ZrO2 is found to have a cation grain boundary diffusivity of $D_{gb} = (0.056 ± 0.05)exp (\frac{-380,000±41,000}{RT})m^2 s^{-1}$, and $D_s = (0.10 ± 0.27)exp(\frac{-380,000 ± 28,000}{RT}) m^2 s^{-1}$.},
doi = {10.1016/j.actamat.2020.08.069},
url = {https://www.osti.gov/biblio/1667414},
journal = {Acta Materialia},
issn = {ISSN 1359-6454},
volume = {199},
place = {United States},
publisher = {Elsevier},
year = {2020},
month = {08}}
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA); US Army Research Office (ARO); National Science Foundation (NSF)