scholarly journals An Analytical Electron Diffraction Technique for the Determination of Long-Range Order Parameters in Multi-Component Ordered Alloys

1991 ◽  
Vol 32 (10) ◽  
pp. 905-910 ◽  
Author(s):  
Syo Matsumura ◽  
Takao Morimura ◽  
Kensuke Oki
Keyword(s):  
Electron Diffraction ◽  
Long Range ◽  
Order Parameters ◽  
Range Order ◽  
Long Range Order ◽  
Electron Diffraction Technique ◽  
Ordered Alloys ◽  
Analytical Electron

The temperature dependence of the long-range order parameter of Ni3Al

1977 ◽  
Vol 10 (1) ◽  
pp. 14-17 ◽  
Author(s):  
D. P. Pope ◽  
J. L. Garin
Keyword(s):  
Long Range ◽  
Order Parameter ◽  
Anomalous Behavior ◽  
Range Order ◽  
Range Order Parameter ◽  
Long Range Order ◽  
Temperature Range ◽  
Ordered Alloys ◽  
Fine Particle Size ◽  
Increasing Temperature

The macroscopic yield stress of Ni3Al increases rapidly with temperature, reaching a maximum at about 700°C. Such anomalous behavior has been observed in other ordered alloys which undergo partial disordering with increasing temperature, e.g. Cu3Au. The long-range order parameter, S, of stoichiometric Ni3Al powder was measured over the temperature range 25°C to 1000°C and great care was taken to ensure a fine particle size and thus avoid extinction effects. The results of this study showed that, in Ni3Al, S remains constant at about 0.93 over the entire temperature range investigated. This means that theories relating the strength of ordered alloys to S are not applicable to Ni3Al.

scholarly journals Long-range Order Parameter Determination by Convergent Beam Electron Diffraction

2010 ◽  
Vol 16 (S2) ◽  
pp. 250-251
Author(s):  
KL Torres ◽  
RR Vanfleet ◽  
GB Thompson
Keyword(s):  
Electron Diffraction ◽  
Long Range ◽  
Order Parameter ◽  
Convergent Beam Electron Diffraction ◽  
Range Order ◽  
Parameter Determination ◽  
Range Order Parameter ◽  
Long Range Order ◽  
Beam Electron ◽  
Convergent Beam

Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.

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