Tritium permeability in polycrystalline tungsten

2019 ◽  
Vol 146 ◽  
pp. 1988-1992 ◽  
Author(s):  
M. Shimada ◽  
R.J. Pawelko
Keyword(s):  
Polycrystalline Tungsten

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.

Positron annihilation lifetime measurement and X-ray analysis on 120 MeV Au +7 irradiated polycrystalline tungsten

2015 ◽  
Vol 467 ◽  
pp. 406-412 ◽  
Author(s):  
Charu Lata Dube ◽  
Pawan Kumar Kulriya ◽  
Dhanadeep Dutta ◽  
Pradeep K. Pujari ◽  
Yashashri Patil ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Lifetime Measurement ◽  
X Ray ◽  
Positron Annihilation Lifetime ◽  
Polycrystalline Tungsten

Oxidation and faceting of polycrystalline tungsten ribbons

1985 ◽  
Vol 161 (1) ◽  
pp. 255-277 ◽  
Author(s):  
J. Lepage ◽  
A. Mezin ◽  
M. Nivoit
Keyword(s):  
Polycrystalline Tungsten

Chemisorption Studies of Nitrogen on Polycrystalline Tungsten

1966 ◽  
Vol 44 (5) ◽  
pp. 2170-2180 ◽  
Author(s):  
M. P. Hill ◽  
S. M. A. Lecchini ◽  
B. A. Pethica
Keyword(s):  
Polycrystalline Tungsten
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