Influence of Phase Stability on Radiation Damage Properties: Plutonium-Gallium Alloys

2007 ◽  
Vol 1043 ◽  
Author(s):  
Steve Valone ◽  
Michael I. Baskes ◽  
Blas P. Uberuaga ◽  
Richard L. Martin ◽  
Alison Kubota ◽  
...  
Keyword(s):  
Damage Evolution ◽  
Threshold Energy ◽  
Fission Products ◽  
Embedded Atom ◽  
Displacement Threshold ◽  
Stacking Fault Tetrahedra ◽  
Short Range Ordering ◽  
Δ Phase ◽  
Minimum Displacement ◽  
Evolution Behavior

AbstractModeling cascade and fission damage evolution of actinide materials of all kinds is essential for understanding their aging characteristics. As an example of how exotic some of the damage evolution behavior can be, plutonium-gallium (Pu-Ga) alloys in the δ-phase (fcc lattices) are explored. Aging emanates from the wide variety of spontaneous decay and fission products that, in the case of the Pu, are such species as helium (He) and uranium, among others, as well as interstitials, and vacancies. To aid in our understanding, the modified embedded atom method (MEAM) formalism is applied to the Pu-Ga-He system. The behavior of defects in the fcc (δ) phase of Pu-based materials is strongly influenced by the metastability of this phase. The influence of this metastability on minimum displacement threshold energy, point defect characteristics and He bubbles is delineated. The roles of short-range ordering and transformations of voids into stacking fault tetrahedra in the aging process are also examined.

Anisotropy of damage productions in electron irradiated molybdenum

1978 ◽  
Vol 36 (1) ◽  
pp. 354-355
Author(s):  
K. Izui ◽  
S. Furuno ◽  
H. Otsu ◽  
T. Nishida ◽  
H. Maeta
Keyword(s):  
Electron Flux ◽  
Threshold Energy ◽  
High Energy ◽  
Voltage Electron ◽  
High Voltage Electron Microscope ◽  
Displacement Threshold ◽  
The Mean ◽  
Channeling Effect ◽  
Different Origins ◽  
Threshold Energies

Anisotropy of damage productions in crystals due to high energy electron bombardment are caused from two different origins. One is an anisotropic displacement threshold energy, and the other is an anisotropic distribution of electron flux near the atomic rows in crystals due to the electron channeling effect. By the n-beam dynamical calculations for germanium and molybdenum we have shown that electron flux at the atomic positions are from ∽4 to ∽7 times larger than the mean incident flux for the principal zone axis directions of incident 1 MeV electron beams, and concluded that such a locally increased electron flux results in an enhanced damage production. The present paper reports the experimental evidence for the enhanced damage production due to the locally increased electron flux and also the results of measurements of the displacement threshold energies for the <100>,<110> and <111> directions in molybdenum crystals by using a high voltage electron microscope.

Displacement threshold energy change in uniform stress fields

1986 ◽  
Vol 135 (2) ◽  
pp. K113-K117
Author(s):  
V. V. Kirsanov ◽  
E. M. Kislitsina
Keyword(s):  
Threshold Energy ◽  
Energy Change ◽  
Stress Fields ◽  
Uniform Stress ◽  
Displacement Threshold

Damage evolution behavior of TiN/Ti multilayer coatings under high-speed impact conditions

2021 ◽  
pp. 127807
Author(s):  
Zhanwei Yuan ◽  
Yutao Han ◽  
Shunlai Zang ◽  
Jiao Chen ◽  
Guangyu He ◽  
...  
Keyword(s):  
Damage Evolution ◽  
High Speed ◽  
Multilayer Coatings ◽  
High Speed Impact ◽  
Evolution Behavior

Displacement threshold energy for type IIa diamond

1992 ◽  
Vol 60 (12) ◽  
pp. 1450-1452 ◽  
Author(s):  
J. Koike ◽  
D. M. Parkin ◽  
T. E. Mitchell
Keyword(s):  
Threshold Energy ◽  
Displacement Threshold

Aging Effect on Corrosion Damage Evolution Behavior of Fuse-Head Used for Electric Explosive Device

2012 ◽  
Vol 166-169 ◽  
pp. 1883-1886
Author(s):  
You Hong Zhang ◽  
Qian Zhang ◽  
Xin Long Chang ◽  
Chun Guo Yue ◽  
Shi Ying Zhang ◽  
...  
Keyword(s):  
Damage Evolution ◽  
Failure Modes ◽  
Experimental Studies ◽  
Corrosion Damage ◽  
Aging Effect ◽  
Factors Affecting ◽  
Temperature And Humidity ◽  
Explosive Device ◽  
Effects Of Temperature ◽  
Evolution Behavior

Degradation of mechanical properties of electric explosive device fuse-head was serious in different temperature and humidity environments. The objective of this study was to examine the effects of temperature and humidity aging on the damage evolution behavior of fuse-head used for electric explosive device. In this paper, the experimental studies were presented to appreciate the influence of humidity and temperature on the corrosion damage and firing of electric explosive device. The damage mechanisms and failure modes were determined through nondestructive evaluation. The explosive broken and corrosion damage on lead induced by temperature and humidity aging were the main factors affecting the firing probability. At last, the evolution rule of corrosion damage in the environment of different relative humidity and temperature was discussed.

Radiation degradation prediction for InGaP solar cells by using appropriate estimation method for displacement threshold energy

2017 ◽  
Vol 122 (11) ◽  
pp. 114901 ◽  
Author(s):  
Y. Okuno ◽  
S. Okuda ◽  
M. Akiyoshi ◽  
T. Oka ◽  
M. Harumoto ◽  
...  
Keyword(s):  
Solar Cells ◽  
Estimation Method ◽  
Threshold Energy ◽  
Displacement Threshold ◽  
Radiation Degradation

scholarly journals Timing Performance Simulation for 3D 4H-SiC Detector

Micromachines ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 46
Author(s):  
Yuhang Tan ◽  
Tao Yang ◽  
Kai Liu ◽  
Congcong Wang ◽  
Xiyuan Zhang ◽  
...  
Keyword(s):  
Time Resolution ◽  
High Energy Physics ◽  
3D Structure ◽  
Three Dimensional ◽  
Threshold Energy ◽  
Atomic Displacement ◽  
High Energy ◽  
Simulation Software ◽  
Design And Optimization ◽  
Displacement Threshold

To meet the high radiation challenge for detectors in future high-energy physics, a novel 3D 4H-SiC detector was investigated. Three-dimensional 4H-SiC detectors could potentially operate in a harsh radiation and room-temperature environment because of its high thermal conductivity and high atomic displacement threshold energy. Its 3D structure, which decouples the thickness and the distance between electrodes, further improves the timing performance and the radiation hardness of the detector. We developed a simulation software—RASER (RAdiation SEmiconductoR)—to simulate the time resolution of planar and 3D 4H-SiC detectors with different parameters and structures, and the reliability of the software was verified by comparing the simulated and measured time-resolution results of the same detector. The rough time resolution of the 3D 4H-SiC detector was estimated, and the simulation parameters could be used as guideline to 3D 4H-SiC detector design and optimization.

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