Point Defects and Swelling Induced in Yttria-stabilized Zirconia by Swift Heavy Ion Irradiations

2010 ◽  
Vol 1264 ◽  
Author(s):  
Jean-Marc Costantini ◽  
François Beuneu
Keyword(s):  
Oxygen Vacancies ◽  
Heavy Ion ◽  
Elastic Collision ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Large Defect ◽  
Swift Heavy Ion ◽  
Out Of Plane ◽  
Collision Processes ◽  
Defect Volume

AbstractWe present a study of point-defect creation in yttria-stabilized zirconia (ZrO2: Y) or YSZ exposed to various heavy ions (from C to U) covering an energy range from 100 MeV to several GeVs. It is concluded that F+-type centers (involving singly-ionized oxygen vacancies) are produced by elastic-collision processes. The ion-induced out-of-plane expansion is found to be small (< 0.2%) and to increase linearly as a function of the average F+-type center concentration with a large slope compatible with small oxygen vacancy clusters. The large defect volume and <100> axial symmetry of the F+-type centers hint that these color centers might actually be divacancies (i.e. F2+ centers).

Swift heavy ion-induced swelling and damage in yttria-stabilized zirconia

2007 ◽  
Vol 101 (7) ◽  
pp. 073501 ◽  
Author(s):  
Jean-Marc Costantini ◽  
Christina Trautmann ◽  
Lionel Thomé ◽  
Jacek Jagielski ◽  
François Beuneu
Keyword(s):  
Heavy Ion ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Swift Heavy Ion

X-ray diffraction study of the damage induced in yttria-stabilized zirconia by swift heavy ion irradiations

2008 ◽  
Vol 104 (7) ◽  
pp. 073504 ◽  
Author(s):  
Jean-Marc Costantini ◽  
François Guillet ◽  
Sébastien Lambert ◽  
Dominique Grébille ◽  
François Beuneu ◽  
...  
Keyword(s):  
Diffraction Study ◽  
Heavy Ion ◽  
Yttria Stabilized Zirconia ◽  
X Ray Diffraction ◽  
Stabilized Zirconia ◽  
X Ray ◽  
Swift Heavy Ion

Stress field induced by swift heavy ion irradiation in cubic yttria stabilized zirconia

2007 ◽  
Vol 101 (10) ◽  
pp. 103516 ◽  
Author(s):  
G. Sattonnay ◽  
M. Lahrichi ◽  
M. Herbst-Ghysel ◽  
F. Garrido ◽  
L. Thomé
Keyword(s):  
Stress Field ◽  
Ion Irradiation ◽  
Heavy Ion ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Swift Heavy Ion Irradiation ◽  
Heavy Ion Irradiation ◽  
Swift Heavy Ion

Environmental Effect on the Crack Behavior of Yttria-Stabilized Zirconia During Laser Drilling

2019 ◽  
Vol 141 (5) ◽  
Author(s):  
Hong Shen ◽  
Juan Jiang ◽  
Decai Feng ◽  
Chen Xing ◽  
Xiaofeng Zhao ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Phase Transformation ◽  
Environmental Effect ◽  
Monoclinic Phase ◽  
Oxygen Vacancies ◽  
High Stress ◽  
Laser Drilling ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Crack Behavior

The crack behaviors of yttrium-stabilized zirconia during laser drilling in air, vacuum, and water environments were investigated. Due to the high stress and low fracture toughness induced by tetragonal-monoclinic phase transformation, tremendous cracks occur during drilling in air. Contrastly, cracks were reduced in vacuum drilling since the phase transformation was suppressed due to the generation of oxygen vacancies. By protection of water, no cracks were observed due to low stress and maintained fracture toughness. The crack mechanisms in different drilling media were discussed.

Microstructure of Swift Heavyion Irradiated MgAl204 Spinel

1998 ◽  
Vol 540 ◽  
Author(s):  
S.J. Zinkle ◽  
Hj. Matzke ◽  
V.A. Skuratov
Keyword(s):  
Heavy Ions ◽  
Room Temperature ◽  
Heavy Ion ◽  
Elastic Collision ◽  
Plan View ◽  
Volumetric Expansion ◽  
Ion Tracks ◽  
Swift Heavy Ion ◽  
Transmission Electron ◽  
Temperature Irradiation

AbstractPlan view and cross-section transmission electron microscopy was used to investigate the microstructure of magnesium aluminate spinel (MgAl2O4) following room temperature irradiation with either 430 MeV Kr, 614 MeV Xe, or 72 MeV I ions. The fluences ranged from 1×1016/m2 (single track regime) to 1×1020/m2. Destruction of the ordered spinel crystal structure on both the anion and cation sublattices was observed in the ion tracks at low fluences. At intermediate fluences, the overlapping ion tracks induced the formation of a new metastable crystalline phase. Amorphization with a volumetric expansion of ∼35% was observed in spinel irradiated with swift heavy ions (electronic stopping powers >7 keV/nm) at fluences above 1×1019/m2. These results demonstrate that swift heavy ion radiation can induce microstructural changes not achievable with conventional elastic collision irradiation at comparable temperatures.

scholarly journals Use of CuNi/YSZ and CuNi/SDC Catalysts for the Reverse Water Gas Shift Reaction

2015 ◽  
Vol 2015 ◽  
pp. 1-9
Author(s):  
Maxime Lortie ◽  
Rima J. Isaifan
Keyword(s):  
Oxygen Vacancies ◽  
Yttria Stabilized Zirconia ◽  
Water Gas Shift ◽  
Water Gas Shift Reaction ◽  
Stabilized Zirconia ◽  
Reverse Water Gas Shift ◽  
Partial Pressures ◽  
Modified Polyol Method ◽  
Shift Reaction ◽  
Water Gas

Cu50Ni50 nanoparticles were synthesized using a modified polyol method and deposited on samarium-doped ceria, SDC, and yttria-stabilized zirconia, YSZ, supports to form reverse water-gas shift, RWGS, catalysts. The best CO yields, obtained with the Cu50Ni50/SDC catalyst, were about 90% of the equilibrium CO yields. In contrast CO yields using Pt/SDC catalysts were equal to equilibrium CO yields at 700°C. Catalyst selectivity to CO was 100% at hydrogen partial pressures equal to CO2 partial pressures, 1 kPa, and decreased as methane was formed when the hydrogen partial pressure was 2 kPa or greater. The reaction results were explained using a combination of Eley-Rideal and Langmuir-Hinshelwood mechanisms that involved adsorption on the metal surface and the concentration of oxygen vacancies in the support. Finally the Cu50Ni50/SDC catalyst was found to be thermally stable for 48 hours at 600/700°C.

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