Radiation-induced phase transformations in MgAl2O4 spinel

被引：23

作者：

Yu, N ^{[1
]}

Devanathan, R ^{[1
]}

Sickafus, KE ^{[1
]}

Nastasi, M ^{[1
]}

机构：

[1] TEXAS INSTRUMENTS INC,SEMICOND PROC & DEVICE CTR,DALLAS,TX 75243

来源：

JOURNAL OF MATERIALS RESEARCH | 1997年 / 12卷 / 07期

关键词：

D O I：

10.1557/JMR.1997.0243

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：1766 / 1770

页数：5

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