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Short-range ordering in structural relaxation of an amorphous Fe/sub 32/Ni/sub 36/Cr/sub 14/P/sub 12/B/sub 6/ alloy

Journal Article · · J. Appl. Phys.; (United States)
DOI:https://doi.org/10.1063/1.340184· OSTI ID:5327682
;

Short-range ordering and its kinetics in the structural relaxation of an amorphous Fe/sub 32/Ni/sub 36/Cr/sub 14/P/sub 12/B/sub 6/ alloy are studied by measurement of electrical resistance. When the specimens are annealed below 250 /sup 0/C, the resistance rises and its temperature coefficient (TCR) decreases, while the resistance is reduced and the TCR increases when annealed above 250 /sup 0/C. This fact is analyzed through the change of structure factor using Nagel's approach for amorphous metals based on the extended Ziman theory. This analysis indicates that the structural relaxation can be classified into two types of short-range rearrangement of atoms; a chemical short-range ordering (CSRO) and a topological short-range ordering (TSRO). Consequently, it can be concluded that the structure factor S(K) at K = 2k/sub F/ increases when CSRO is formed, whereas it decreases in the progress of TSRO and the cause is attributable to the difference in the second moment of the atomic-level internal stress distribution

in both states. Furthermore, the kinetics in the formation of the CSRO are analyzed on the assumption that the relaxation time obeys logarithmic normal distribution and from there the distribution width and the mean activation energy are determined to be 3.4 and 1.83 eV, respectively.

Research Organization:
Department of Physics, Faculty of Science and Technology, Science University of Tokyo, Noda, Chiba 278, Japan
OSTI ID:
5327682
Journal Information:
J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 63:9; ISSN JAPIA
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALLOYS
AMORPHOUS STATE
ANNEALING
BORON ALLOYS
CHROMIUM ALLOYS
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HEAT TREATMENTS
IRON ALLOYS
IRON BASE ALLOYS
MATHEMATICS
MEDIUM TEMPERATURE
METALLIC GLASSES
NICKEL ALLOYS
ORDER-DISORDER TRANSFORMATIONS
PHASE TRANSFORMATIONS
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
STRESSES
TEMPERATURE DEPENDENCE
TOPOLOGY