II. - SHORT RANGE ORDER - SUPER IONIC CONDUCTORSSTUDIES OF ORDERING USING HIGH RESOLUTION ELECTRON MICROSCOPY

1977 ◽  
Vol 38 (C7) ◽  
pp. C7-135-C7-144 ◽  
Author(s):  
S. IIJIMA ◽  
J. M. COWLEY
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Short Range ◽  
Short Range Order ◽  
High Resolution Electron Microscopy ◽  
Range Order ◽  
Resolution Electron

High resolution observations of short-range ordering in disordered Au4Mn alloys

1984 ◽  
Vol 42 ◽  
pp. 426-427
Author(s):  
Nobuo Tanaka ◽  
Ken-ichi Ohshima ◽  
Jinpei Harada ◽  
J.M. Cowley
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Diffuse Scattering ◽  
Short Range ◽  
High Resolution Electron Microscopy ◽  
Atomic Level ◽  
X Ray ◽  
Direct Observations ◽  
Resolution Electron ◽  
Short Range Ordering

Observation of short range ordered (SRO) state in disordered binary alloys is the interesting topic in the point of order-disorder transition. The observation and analysis have been made with X-ray and neutron diffraction techniques which can give the SRO-parameters. These techniques, however, give only the information of an averaged structure. The ordering process is localized, so direct observations in atomic level by high resolution electron microscopy is needed for the detailed analysis.In the present study, disordered Au4Mn alloys were investigated with high resolution electron microscopy for the analysis of the origin of the characteristic SRO diffuse scattering (Fig. 1). The material was prepared by quenching and thinned by electrolytic polishing for microscopic observations. The specimen was observed along <120> direction by JEOL-200CX electron microscope (E=200keV).

Investigations of short range order in amorphous Fe-B alloys

1988 ◽  
Vol 46 ◽  
pp. 458-459
Author(s):  
J. Zweck ◽  
H. Hoffmann
Keyword(s):  
Physical Properties ◽  
Short Range ◽  
Short Range Order ◽  
Amorphous State ◽  
High Resolution Electron Microscopy ◽  
Near Neighbor ◽  
Distribution Functions ◽  
Range Order ◽  
Resolution Electron ◽  
Pair Distribution Functions

Amorphous metallic alloys exhibit a large variety of physical properties that often differ from their crystalline counterparts of the same composition. Currently, metallic glasses exist which, to name only a few examples, are either very non-abrasive, soft magnetic and magneto optical, hard, flexible, or resistant to corrosion. These properties are of great technical importance and there are many applications that are based on amorphous alloys. Since physical properties are related to the structure of a material, a better knowledge of the ‘structure’ of the amorphous state is of great interest. In this work, we present pair distribution functions determined from electron diffraction results for amorphous Fe-B alloys of different compositions. From the pair distribution functions one can obtain information about near neighbor distances, the range of a short range order (SRO) for different compositions, and of similarities to crystalline counterparts. These findings will also be compared to results obtained with the use of high resolution electron microscopy (HREM).

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