Topological and chemical short-range order in amorphous Ni-Ti alloys

Journal Article · Thu Dec 31 23:00:00 EST 1981 · AIP Conf. Proc.; (United States)

DOI:https://doi.org/10.1063/1.33678· OSTI ID:6490336

Wagner, C N.J.; Ruppersberg, H

Neutron and x-ray scattering measurements were made on amorphous Ni/sub 35/Ti/sub 65/ and Ni/sub 40/Ti/sub 60/ alloys prepared by the melt-spinning process. The x-ray interference functions (structure factors) S/sup x/(K) are dominated by the topological short-range order (TSRO) S/sub NN/(K), but exhibited a small prepeak. The neutron structure factors S/sup n/(K) are dominated by the CSRO S/sub CC/(K)/(c/sub 1/c/sub 2/), describing the concentration fluctuations in the alloys. Assuming that the size effect term S/sub NC/(K) which describes the correlation between number density and concentration can be approximated by the Percus-Yevick hard sphere model, the TSRO S/sub NN/(K) and CSRO S/sub CC/(K)/(c/sub 1/c/sub 2/) were evaluated. From their Fourier transforms it became possible to evaluate the chemical short-range order parameter ..cap alpha.. which is of the order of -0.1 to -0.15 indicating a preference for unlike nearest neighbors in the amorphous Ni-Ti alloys.

• Research Organization: Univ. of California, Los Angeles
• OSTI ID: 6490336
• Journal Information: AIP Conf. Proc.; (United States), Journal Name: AIP Conf. Proc.; (United States) Vol. 89; ISSN APCPC
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
AMORPHOUS STATE
BARYONS
DATA
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
HADRONS
INFORMATION
INTERFERENCE
IONIZING RADIATIONS
NEUTRONS
NICKEL ALLOYS
NUCLEONS
NUMERICAL DATA
ORDER PARAMETERS
QUANTITY RATIO
RADIATIONS
SCATTERING
STRUCTURE FACTORS
TITANIUM ALLOYS
X RADIATION