Atomistic image of the kinetics of order-order reactions in Ni{sub 3}Al+B
Book
·
OSTI ID:479322
- Univ. of Vienna (Austria). Inst. fuer Festkoerperphysik
Isothermal order-order relaxations in L1{sub 2}-ordered N{sub 76}Al{sub 24} + 0.19 at.%B were studied by means of residual resistometry. This method made it possible to register very fine changes in the degree of LRO occurring about 1,000 K below the disordering temperature. The experimental results of two simultaneous processes being involved in these order-order relaxations with a high activation energy of 4.6 eV are explained with an atomistic model of atomic jumps to nn vacancies. The parallel processes are connected with selected jumps of atoms to nn vacancies on different sublattices with a high activation energy of vacancy formation being involved.
- OSTI ID:
- 479322
- Report Number(s):
- CONF-951155--; ISBN 1-55899-301-0
- Country of Publication:
- United States
- Language:
- English
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