Radiation-induced phase transformations in MgAl2O4 spinel Academic Article

abstract

• Ion-irradiation was observed to transform MgAl2O4 spinel first to a metastable crystalline phase and then to an amorphous phase at cryogenic temperatures. Elastic stiffening of 15% occurred upon formation of the metastable crystalline phase. A second transformation from the metastable crystalline spinel to an amorphous state was accompanied by elastic softening of 25% relative to unirradiated spinel. This phase transformation behavior in spinel appears to be different from that in intermetallic compounds where only elastic softening associated with radiation damage accumulation is observed. A two-stage radiation damage model is proposed to explain the observed phase transformations.

authors

• Nastasi, Michael

published proceedings

• Journal of Materials Research

author list (cited authors)

• Yu, N., Devanathan, R., Sickafus, K. E., & Nastasi, M.

citation count

• 21

complete list of authors

• Yu, Ning||Devanathan, Ram||Sickafus, Kurt E||Nastasi, Michael

publication date

• July 1997

publisher

• Springer Nature  Publisher

published in

• Journal of Materials Research  Journal

Digital Object Identifier (DOI)

• 10.1557/jmr.1997.0243

start page

• 1766

end page

• 1770

volume

• 12

issue

• 7

URL

• http://dx.doi.org/10.1557/jmr.1997.0243