Actions for Cation disorder in high-dose, neutron-irradiated spinel [electronic resource].

Email RIS file
Bookmark
Report an Issue

Cation disorder in high-dose, neutron-irradiated spinel [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1994.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
13 pages : digital, PDF file
Additional Creators
Pacific Northwest Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Free-to-read Unrestricted online access
Summary
The objective of this effort is to determine whether MgAl₂O₄ spinel is a suitable ceramic for fusion applications. Here, the crystal structures of MgAl₂O₄ spinel single crystals irradiated to high neutron fluences [>5·10²⁶ n/m² (E{sub n} > 0.1 MeV)] were examined by neutron diffraction. Crystal structure refinement of the highest dose sample indicated that the average scattering strength of the tetrahedral crystal sites decreased by ∼ 20% while increasing by ∼ 8% on octahedral sites. Since the neutron scattering length for Mg is considerably larger than for Al, this results is consistent with site exchange between Mg{sup 2+} ions on tetrahedral sites and Al{sup 3+} ions on octahedral sites. Least-squares refinements also indicated that, in all irradiated samples, at least 35% of Mg{sup 2+} and Al{sup 3+} ions in the crystal experienced disordering replacements. This retained dpa on the cation sublattices is the largest retained damage ever measured in an irradiated spinel material.
Report Numbers
E 1.99:pnl-sa--23531
E 1.99: conf-940416--26
conf-940416--26
pnl-sa--23531
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
08/01/1994.
"pnl-sa--23531"
" conf-940416--26"
"DE94018730"
96. annual meeting of the American Ceramic Society (ACS),Indianapolis, IN (United States),25-28 Apr 1994.
Larson, A.C.; Nastasi, M.; Sickafus, K.E.; Garner, F.A.; Hollenberg, G.W.; Yu, N.; Bradt, R.C.
Funding Information
AC06-76RL01830
View MARC record | catkey: 14745398