Structure and glass transition of amorphous Zr65Cu17.5Ni10Al7.5 studied by positron lifetime

被引：22
作者：
Dittmar, R [1 ]
Wurschum, R
Ulfert, W
Kronmuller, H
Schaefer, HE
机构：
[1] Univ Stuttgart, Inst Theoret & Angew Phys, D-70550 Stuttgart, Germany
[2] Max Planck Inst Met Res, D-70506 Stuttgart, Germany
来源：
SOLID STATE COMMUNICATIONS | 1998年 / 105卷 / 04期
关键词：
disordered systems; point defects; thermodynamic properties; positron spectroscopies;
D O I：
10.1016/S0038-1098(97)10094-1
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Structural studies below and above the glass transition of bulk-amorphous Zr65Cu17.5Ni10Al7.5 were performed by means of high-temperature positron-lifetime measurements using a Co-58-positron source. A dense atomic packing is concluded from the observation of thermal detrapping of positrons from free volumes at elevated temperatures below the glass-transition temperature T-g. At T-g a structural relaxation is detected and indirect indications of the thermal formation of structural free volumes are found. (C) 1997 Elsevier Science Ltd.
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收藏
页码：221 / 224
页数：4
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