Diffusion studies in amorphous NiZr alloys

Conference · Mon Jun 01 04:00:00 EDT 1987

OSTI ID:5801790

Hahn, H; Averback, R S; Hoshino, K; Rothman, S J

Tracer impurity and self diffusion measurements have been made on amorphous (a-) NiZr alloys using radioactive tracer, Secondary Ion Mass Spectrometry and Rutherford backscattering techniques. The temperature dependence of diffusion in a-NiZr can be represented in the form D = D/sub 0/exp(-Q/kT), with no structural relaxation effects being observed. The mobility of an atom in a-NiZr increased dramatically with decreasing atomic radius of the diffusing atom and also with decreasing Ni content for Ni concentrations below approx. =40 at. %. These diffusion characteristics in a-NiZr are remarkably similar to those in ..cap alpha..-Zr and ..cap alpha..-Ti. These mechanisms assume that Zr and Ti provide a close packed structure, either crystalline or amorphous, through which small atoms diffuse by an interstitial mechanism and large atoms diffuse by a vacancy mechanism. 12 refs., 2 figs., 2 tabs.

• Research Organization: Argonne National Lab., IL (USA); Illinois Univ., Urbana (USA). Dept. of Materials Science and Engineering
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5801790
• Report Number(s): CONF-870893-6; ON: DE88003009
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ACTIVATION ENERGY
ALLOYS
AMORPHOUS STATE
ATOMIC RADII
ATOMS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COBALT 60
COBALT ISOTOPES
COPPER
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DIFFUSION
ELEMENTS
ENERGY
EVEN-ODD NUCLEI
FILMS
GOLD
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
INTERSTITIALS
IRON
ISOMERIC TRANSITION ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
METALS
MINUTES LIVING RADIOISOTOPES
NICKEL 63
NICKEL ALLOYS
NICKEL ISOTOPES
NUCLEI
ODD-ODD NUCLEI
POINT DEFECTS
RADIOISOTOPES
SELF-DIFFUSION
SEMIMETALS
SILICON
STABILITY
TEMPERATURE DEPENDENCE
THIN FILMS
TITANIUM
TRACER TECHNIQUES
TRANSITION ELEMENTS
VACANCIES
YEARS LIVING RADIOISOTOPES
ZIRCONIUM ALLOYS