Production of low-dislocation single crystals of Cu-Si alloy and study of the dependence of the microhardness on the dislocation density and the percentage content of silicon in the copper

1975 ◽  
Vol 18 (1) ◽  
pp. 105-107
Author(s):  
A. G. Basariya ◽  
V. V. Sanadze
Keyword(s):  
Dislocation Density ◽  
Single Crystals ◽  
Percentage Content

Investigation of shock-wave deformation history from recovered structure

1986 ◽  
Vol 44 ◽  
pp. 434-435
Author(s):  
M.A. Mogilevsky ◽  
L.S. Bushnev
Keyword(s):  
Shock Wave ◽  
Plastic Deformation ◽  
Dislocation Density ◽  
Shock Waves ◽  
Shock Front ◽  
Single Crystals ◽  
Residual Deformation ◽  
Deformation Structure ◽  
Deformation History ◽  
Deformation Velocity

Single crystals of Al were loaded by 15 to 40 GPa shock waves at 77 K with a pulse duration of 1.0 to 0.5 μs and a residual deformation of ∼1%. The analysis of deformation structure peculiarities allows the deformation history to be re-established.After a 20 to 40 GPa loading the dislocation density in the recovered samples was about 1010 cm-2. By measuring the thickness of the 40 GPa shock front in Al, a plastic deformation velocity of 1.07 x 108 s-1 is obtained, from where the moving dislocation density at the front is 7 x 1010 cm-2. A very small part of dislocations moves during the whole time of compression, i.e. a total dislocation density at the front must be in excess of this value by one or two orders. Consequently, due to extremely high stresses, at the front there exists a very unstable structure which is rearranged later with a noticeable decrease in dislocation density.

Growth Of Low-Dislocation-Density InP Single Crystals By The VCZ Method

1989 ◽  
Author(s):  
M. Tatsumi ◽  
T. Kawase ◽  
T. Araki ◽  
N. Yamabayashi ◽  
T. Iwasaki ◽  
...  
Keyword(s):  
Dislocation Density ◽  
Single Crystals ◽  
Low Dislocation Density

Topographic study of dislocation structure in hexagonal SiC single crystals with low dislocation density

2007 ◽  
Vol 304 (1) ◽  
pp. 57-63 ◽  
Author(s):  
Daisuke Nakamura ◽  
Satoshi Yamaguchi ◽  
Itaru Gunjishima ◽  
Yoshiharu Hirose ◽  
Tsunenobu Kimoto
Keyword(s):  
Dislocation Density ◽  
Single Crystals ◽  
Dislocation Structure ◽  
Low Dislocation Density

scholarly journals A Technique for Producing Strain-Free Flat Surfaces on Single Crystals of Ice

1970 ◽  
Vol 9 (57) ◽  
pp. 385-390 ◽  
Author(s):  
T. M Tobin ◽  
K. Itagaki
Keyword(s):  
Dislocation Density ◽  
Single Crystals ◽  
Aluminum Surface ◽  
Ice Crystal ◽  
X Ray ◽  
Flat Surfaces ◽  
Etch Pit

The top surface of an accurately aligned ice crystal is melted by an aluminum surface and then frozen to a warm “Lucite” plate ant! tapped free. Etch-pit development shows that the dislocation density on the resulting surface is similar to die bulk dislocation density determined by X-ray topographic methods.

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