IR spectral density of H-bonds. Both intrinsic anharmonicity of the fast mode and the H-bond bridge. Part I: Anharmonic coupling parameter and temperature effects

2007 ◽  
Vol 821 (1-3) ◽  
pp. 9-21 ◽  
Author(s):  
Najeh Rekik ◽  
Noureddine Issaoui ◽  
Houcine Ghalla ◽  
Brahim Oujia ◽  
Marek J. Wójcik
Keyword(s):  
Spectral Density ◽  
Temperature Effects ◽  
Coupling Parameter ◽  
Fast Mode ◽  
Anharmonic Coupling ◽  
Intrinsic Anharmonicity

Spectral density of H-bonds. II. Intrinsic anharmonicity of the fast mode within the strong anharmonic coupling theory

2001 ◽  
Vol 273 (1) ◽  
pp. 11-37 ◽  
Author(s):  
Najeh Rekik ◽  
Adina Velcescu ◽  
Paul Blaise ◽  
Olivier Henri-Rousseau
Keyword(s):  
Spectral Density ◽  
Fast Mode ◽  
Coupling Theory ◽  
Anharmonic Coupling ◽  
Intrinsic Anharmonicity

IR spectral density of H-bonds. Both intrinsic anharmonicity of the fast mode and the H-bond bridge. Part II: Isotopic effect

2008 ◽  
Vol 855 (1-3) ◽  
pp. 102-110 ◽  
Author(s):  
Houcine Ghalla ◽  
Najeh Rekik ◽  
Mohamed Baazaoui ◽  
Brahim Oujia ◽  
Marek J. Wójcik
Keyword(s):  
Spectral Density ◽  
Isotopic Effect ◽  
Fast Mode ◽  
Intrinsic Anharmonicity

Infrared spectral density of H-bonds within the strong anharmonic coupling theory: Indirect relaxation effect

2007 ◽  
Vol 844-845 ◽  
pp. 21-31 ◽  
Author(s):  
Najeh Rekik ◽  
Noureddine Issaoui ◽  
Houcine Ghalla ◽  
Brahim Oujia ◽  
Marek J. Wójcik
Keyword(s):  
Spectral Density ◽  
Relaxation Effect ◽  
Coupling Theory ◽  
Infrared Spectral ◽  
Anharmonic Coupling

Characterization of carbides in M50NiL

1991 ◽  
Vol 49 ◽  
pp. 606-607
Author(s):  
L. S. Lin ◽  
K. P. Gumz ◽  
A. V. Karg ◽  
C. C. Law
Keyword(s):  
Temperature Effects ◽  
Base Composition ◽  
Lattice Parameter ◽  
Control Surface ◽  
Carbide Formation ◽  
Particle Sizes ◽  
Low Carbon ◽  
Fee Structure ◽  
Heat Treated

Carbon and temperature effects on carbide formation in the carburized zone of M50NiL are of great importance because they can be used to control surface properties of bearings. A series of homogeneous alloys (with M50NiL as base composition) containing various levels of carbon in the range of 0.15% to 1.5% (in wt.%) and heat treated at temperatures between 650°C to 1100°C were selected for characterizations. Eleven samples were chosen for carbide characterization and chemical analysis and their identifications are listed in Table 1.Five different carbides consisting of M6C, M2C, M7C3 and M23C6 were found in all eleven samples examined as shown in Table 1. M6C carbides (with least carbon) were found to be the major carbide in low carbon alloys (<0.3% C) and their amounts decreased as the carbon content increased. In sample C (0.3% C), most particles (95%) encountered were M6C carbide with a particle sizes range between 0.05 to 0.25 um. The M6C carbide are enriched in both Mo and Fe and have a fee structure with lattice parameter a=1.105 nm (Figure 1).

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