The Location of Displaced Manganese and Silver Atoms in Irradiated Aluminum Crystals by Backscattering

Author(s):  
M. L. Swanson ◽  
F. Maury ◽  
A. F. Quenneville
Keyword(s):  
Author(s):  
A. K. Eikum

Precipitation phenomena in concentrated aluminum-base silver alloys have been studied with a variety of techniques including electron microscopy. The purpose of the present work was to investigate the dislocation reactions that occur as silver atoms precipitate (or segregate) under a relatively low supersaturation. Specimens (0.1 mm thick) of Al-1 at. % Ag were quenched from ~500°C into an oil bath at room temperature and aged 30 min. at 265°C. The initial configurations available as sites for heterogeneous precipitation will therefore include perfect prismatic dislocation loops, Frank sessile loops and random segments of grown-in dislocations.


2012 ◽  
Vol 19 (2) ◽  
pp. 195-197 ◽  
Author(s):  
Gianfranco Carotenuto ◽  
Mariano Palomba ◽  
Luigi Nicolais

AbstractLightfast color filters (intensively and brightly colored) can be easily produced by dying optical plastics with the surface plasmon resonance (SPR) of metal nanoparticles such as silver and gold. Here, color filters based on silver nanoparticles embedded in amorphous polystyrene have been prepared by dissolving and thermally decomposing (1,5-cyclooctadiene)(hexafluoro-acetylacetonate)silver(I) in amorphous polystyrene. The metal precursor quickly decomposes (10 s, at 180°C), leading to silver atoms that clusterize and produce a non-aggregated dispersion of silver particles in the polymer matrix. The intensity of the yellow coloration due to the SPR of nanoscopic silver can be widely tuned simply by varying the cluster numerical density in the polymer matrix that depends on the silver precursor concentration. The obtained nanocomposite films have been characterized by X-ray power diffraction, transmission electron microscopy, and UV-Vis spectroscopy.


1989 ◽  
Vol 28 (4) ◽  
pp. 471-472 ◽  
Author(s):  
Fausto Calderazzo ◽  
Guido Pampaloni ◽  
Ullrich Englert ◽  
Joachim Strähle

2002 ◽  
Vol 157 (6-12) ◽  
pp. 829-831 ◽  
Author(s):  
P. García-Fernández ◽  
J. A. Aramburu ◽  
M. T. Barriuso ◽  
M. Moreno
Keyword(s):  

1989 ◽  
Vol 164 (2-3) ◽  
pp. 299-306 ◽  
Author(s):  
A.V. Astashkin ◽  
S.A. Dikanov ◽  
A.M. Tyryshkin ◽  
Yu.D. Tsvetkov
Keyword(s):  

1988 ◽  
Vol 92 (10) ◽  
pp. 2745-2750 ◽  
Author(s):  
J. H. B. Chenier ◽  
C. A. Hampson ◽  
J. A. Howard ◽  
B. Mile

Author(s):  
H. M. Maurer ◽  
Alarich Weiss

AbstractThe crystal structure of diamminesilver dinitroargentate, [Ag(NHThe point positions of the silver atoms were obtained by the heavy-atom method whereas those of the light atoms were found by difference Fourier syntheses. Coordinates and anisotropic temperature factors were refined by block-diagonal least-squares methods with the result


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