scholarly journals Study of Resistance to Helium Swelling of Lithium-Containing Ceramics under High-Temperature Irradiation

Crystals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1350
Author(s):  
Dmitriy I. Shlimas ◽  
Artem L. Kozlovskiy ◽  
Askar Kh. Syzdykov ◽  
Daryn B. Borgekov ◽  
Maxim V. Zdorovets
Keyword(s):  
Surface Layer ◽  
High Temperature ◽  
Radiation Damage ◽  
Thermal Annealing ◽  
Reactor Core ◽  
Strength Properties ◽  
Radiation Defects ◽  
Temperature Irradiation ◽  
Thermal Sintering ◽  
Damage Processes

The aim of this work was to study resistance to helium accumulation processes in the structure of the surface layer of lithium-containing ceramics and the subsequent destruction and embrittlement processes, depending on radiation fluence. The objects of study were Li2TiO3-type ceramics obtained by thermal sintering. The fluence dependency of changes in the structural and strength properties of ceramics was determined to be in the range from 1018 to 1022 ion/m2, which corresponded to the concentration of implanted helium from 0.01% to 0.8–1 at.%. Irradiation was carried out at a temperature of 700 °C, which made it possible to simulate the processes of radiation damage that were closest to the real conditions in the reactor core. During the studies carried out, it was found that, at irradiation fluences of 1018–1020 ion/m2, the formation of point radiation defects was equaled by the process of thermal annealing of defects, as a result of which the concentration of defects and their effect on the change in the structural and strength properties of ceramics were insignificant. An increase in the concentration of implanted helium in the structure of the surface layer to above 0.5 at.% led to the dominance of radiation damage processes over the annealing of defects and the formation of gas-filled cavities, which negatively affects the strength of ceramics.

Radiation damage of beryllium during high-temperature irradiation

1971 ◽  
Vol 30 (5) ◽  
pp. 538-542 ◽  
Author(s):  
Z. I. Chechetkina ◽  
V. P. Gol'tsev ◽  
V. A. Kazakov ◽  
G. A. Sernyaev ◽  
V. G. Bazyukin
Keyword(s):  
High Temperature ◽  
Radiation Damage ◽  
Temperature Irradiation

Thermal annealing as a method to predict results of high temperature irradiation embrittlement

2013 ◽  
Vol 432 (1-3) ◽  
pp. 501-504
Author(s):  
A. Kryukov ◽  
L. Debarberis ◽  
P. Hähner ◽  
F. Gillemot ◽  
F. Oszvald
Keyword(s):  
High Temperature ◽  
Thermal Annealing ◽  
Irradiation Embrittlement ◽  
Temperature Irradiation

Radiation damage of Si photodiodes by high-temperature irradiation

2003 ◽  
Vol 66 (1-4) ◽  
pp. 536-541 ◽  
Author(s):  
H Ohyama ◽  
K Takakura ◽  
K Shigaki ◽  
S Kuboyama ◽  
S Matsuda ◽  
...  
Keyword(s):  
High Temperature ◽  
Radiation Damage ◽  
Temperature Irradiation

Radiation damage in Si photodiodes by high-temperature irradiation

2003 ◽  
Vol 16 (3-4) ◽  
pp. 533-538 ◽  
Author(s):  
H. Ohyama ◽  
E. Simoen ◽  
C. Claeys ◽  
K. Takakura ◽  
H. Matsuoka ◽  
...  
Keyword(s):  
High Temperature ◽  
Radiation Damage ◽  
Temperature Irradiation

Deuterium Retention in a Nanostructured Tungsten Surface Layer Formed during High-Temperature Irradiation with Helium Plasma

2020 ◽  
Vol 14 (6) ◽  
pp. 1248-1253
Author(s):  
Z. R. Harutyunyan ◽  
O. V. Ogorodnikova ◽  
A. S. Aksenova ◽  
Yu. M. Gasparyan ◽  
V. S. Efimov ◽  
...  
Keyword(s):  
Surface Layer ◽  
High Temperature ◽  
Helium Plasma ◽  
Temperature Irradiation ◽  
Tungsten Surface ◽  
Deuterium Retention

scholarly journals Study of the Effect of Y2O3 Doping on the Resistance to Radiation Damage of CeO2 Microparticles under Irradiation with Heavy Xe22+ Ions

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1459
Author(s):  
Igor A. Ivanov ◽  
Ruslan M. Rspayev ◽  
Aset D. Sapar ◽  
Daulet A. Mustafin ◽  
Maxim V. Zdorovets ◽  
...  
Keyword(s):  
Radiation Damage ◽  
Structural Changes ◽  
Solid Phase Synthesis ◽  
Dopant Concentration ◽  
Solid Phase ◽  
Structural Characteristics ◽  
Radiation Defects ◽  
Crystallinity Degree ◽  
Phase Synthesis ◽  
Thermal Sintering

This paper presents the results of a study on the influence of Y2O3 doping on the resistance to radiation damage and an assessment of structural changes associated with the accumulation of radiation defects in CeO2 microparticles under irradiation with heavy Xe22+ ions. The relevance of this study consists of the prospects for the use of CeO2 microparticles as materials and candidates of inert matrices of nuclear fuel. A method of solid-phase synthesis was applied to obtain microparticles with different concentrations of dopant. It included grinding of CeO2 and Y2O3 microparticles followed by thermal sintering at 1100 °C in an oxygen-containing medium to produce highly ordered microparticles. During the study of the structural characteristics of the synthesized microparticles, it was found that increasing the dopant concentration from 0.05 mol.% to 0.15 mol.% leads to an increase in the crystallinity degree as well as a decrease in dislocation density. According to the results of the assessment of the resistance of microparticles to radiation damage, it was found that an increase in the dopant concentration leads to a decrease in swelling and structural distortion by more than 2.5–3 times, which indicates an increase in the radiation resistance.

Review of the Radiation Damage Problem of Organic Specimens in Electron Microscopy

1973 ◽  
Vol 31 ◽  
pp. 476-477
Author(s):  
L. Reimer
Keyword(s):  
Electron Microscopy ◽  
Radiation Damage ◽  
Irradiation Time ◽  
Dose Effect ◽  
Primary Process ◽  
Thin Specimen ◽  
Secondary Damage ◽  
Small Doses ◽  
Micro Organisms ◽  
Damage Processes

Most information about a specimen is obtained by elastic scattering of electrons, but one cannot avoid inelastic scattering and therefore radiation damage by ionisation as a primary process of damage. This damage is a dose effect, being proportional to the product of lectron current density j and the irradiation time t in Coul.cm−2 as long as there is a negligible heating of the specimen.Therefore one has to determine the dose needed to produce secondary damage processes, which can be measured quantitatively by a chemical or physical effect in the thin specimen. The survival of micro-organisms or the decrease of photoconductivity and cathodoluminescence are such effects needing very small doses (see table).

Annealing Of Radiation Damage in Tungsten

1970 ◽  
Vol 28 ◽  
pp. 412-413
Author(s):  
Robert C. Rau ◽  
John Moteff
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Radiation Damage ◽  
Thermal Annealing ◽  
Neutron Fluence ◽  
Dislocation Loops ◽  
Defect Clusters ◽  
Polycrystalline Tungsten ◽  
Transmission Electron ◽  
Radiation Induced

Transmission electron microscopy has been used to study the thermal annealing of radiation induced defect clusters in polycrystalline tungsten. Specimens were taken from cylindrical tensile bars which had been irradiated to a fast (E > 1 MeV) neutron fluence of 4.2 × 1019 n/cm2 at 70°C, annealed for one hour at various temperatures in argon, and tensile tested at 240°C in helium. Foils from both the unstressed button heads and the reduced areas near the fracture were examined.Figure 1 shows typical microstructures in button head foils. In the unannealed condition, Fig. 1(a), a dispersion of fine dot clusters was present. Annealing at 435°C, Fig. 1(b), produced an apparent slight decrease in cluster concentration, but annealing at 740°C, Fig. 1(C), resulted in a noticeable densification of the clusters. Finally, annealing at 900°C and 1040°C, Figs. 1(d) and (e), caused a definite decrease in cluster concentration and led to the formation of resolvable dislocation loops.

PRESSURDIE-1

Alloy Digest ◽  
1967 ◽  
Vol 16 (4) ◽  
Keyword(s):  
High Temperature ◽  
Die Casting ◽  
Heat Treating ◽  
High Heat ◽  
Strength Properties ◽  
High Temperature Strength ◽  
High Heat Resistance ◽  
Die Steel ◽  
Temperature Performance ◽  
Steel Industries

Abstract PRESSURDIE-1 is an air-hardening hot work tool and die steel having high heat resistance and good high temperature strength properties. It is recommended for die casting dies, extrusion and forging dies. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: TS-191. Producer or source: Continental Copper & Steel Industries Inc..

High-temperature carbon plastics based on thermoreactive polyimide binder

2020 ◽  
pp. 89-102
Author(s):  
M. I. Valueva ◽  
I. V. Zelenina ◽  
M. A. Zharinov ◽  
M. A. Khaskov
Keyword(s):  
Glass Transition ◽  
High Temperature ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Strength Properties ◽  
High Glass Transition Temperature ◽  
Reinforced Plastics ◽  
Carbon Plastics ◽  
Fundamental Possibility ◽  
Fiber Reinforced Plastics

The article presents results of studies of experimental carbon plastics based on thermosetting PMRpolyimide binder. Сarbon fiber reinforced plastics (CFRPs) are made from prepregs prepared by melt and mortar technologies, so the rheological properties of the polyimide binder were investigated. The heat resistance of carbon plastics was researched and its elastic-strength characteristics were determined at temperatures up to 320°С. The fundamental possibility of manufacturing carbon fiber from prepregs based on polyimide binder, obtained both by melt and mortar technologies, is shown. CFRPs made from two types of prepregs have a high glass transition temperature: 364°C (melt) and 367°C (solution), with this temperature remaining at the 97% level after boiling, and also at approximately the same (86–97%) level of conservation of elastic strength properties at temperature 300°С.

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