Ultrahigh temperature in situ transmission electron microscopy based bicrystal coble creep in Zirconia II: Interfacial thermodynamics and transport mechanisms

Autor: Dereck N.F. Muche, Ricardo H. R. Castro, Shen J. Dillon, Lin Feng, K.S.N. Vikrant, Khalid Hattar, Robson L. Grosso, Anthony M. Monterrosa, R. Edwin García, Eliana N. S. Muccillo, Gowtham S. Jawaharram, Christopher M. Barr

Publikováno v: Acta Materialia. 200:1008-1021

This work uses a combination of stress dependent single grain boundary Coble creep and zero-creep experiments to measure interfacial energies, along with grain boundary point defect formation and migration volumes in cubic ZrO2. These data, along wit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7033ed60431071c7d5308b04ed2fbe58
https://doi.org/10.1016/j.actamat.2020.08.070

In Situ Transmission Electron Microscopy for Ultrahigh Temperature Mechanical Testing of ZrO2

Autor: Shen J. Dillon, Khalid Hattar, Ricardo H. R. Castro, Eliana N. S. Muccillo, Anthony M. Monterrosa, Gowtham S. Jawaharram, Dereck N.F. Muche, Christopher M. Barr, Robson L. Grosso

Publikováno v: Nano Letters. 20:1041-1046

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 m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c073640c63c8bb635cfab6b202992bf0
https://doi.org/10.1021/acs.nanolett.9b04205

Evidence for a High Temperature Whisker Growth Mechanism Active in Tungsten during In Situ Nanopillar Compression

Autor: Shen J. Dillon, Christopher M. Barr, Khalid Hattar, Gowtham S. Jawaharram

Publikováno v: Nanomaterials
Nanomaterials, Vol 11, Iss 2429, p 2429 (2021)
Nanomaterials (Basel, Switzerland), vol 11, iss 9
Volume 11
Issue 9

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

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b2663d3b67d9945f19709a213d60690
http://europepmc.org/articles/PMC8467130

High temperature irradiation induced creep in Ag nanopillars measured via in situ transmission electron microscopy

Autor: Robert S Averback, Patrick M. Price, Shen J. Dillon, Khalid Hattar, Christopher M. Barr, Gowtham S. Jawaharram

Publikováno v: Scripta Materialia. 148:1-4

Irradiation induced creep (IIC) rates are measured in compression on Ag nanopillar (square) beams in the sink-limited regime. The IIC rate increases linearly with stress at lower stresses, i.e. below ≈2/3 the high temperature yield stress and parab

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::66dc4f7fb25b6cf6b7c0f0ff703e3946
https://doi.org/10.1016/j.scriptamat.2018.01.007

Irradiation-induced creep in metallic nanolaminates characterized by In situ TEM pillar nanocompression

Autor: Khalid Hattar, Xuying Liu, Shen J. Dillon, Robert S Averback, Gowtham S. Jawaharram, Daniel Charles Bufford, Calvin Robert Lear

Publikováno v: Journal of Nuclear Materials. 490:59-65

This work reports on irradiation-induced creep (IIC) measured on nanolaminate (Cu-W and Ni-Ag) and nanocrystalline alloys (Cu-W) at room temperature using a combination of heavy ion irradiation and nanopillar compression performed concurrently in sit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4ae3abcec5e4daef8956568f5d4f18fd
https://doi.org/10.1016/j.jnucmat.2017.04.008