Free volumes and thermal stability of electro-deposited nanocrystalline Pd

被引：17
|
作者：
Wurschum, R [1 ]
Gruss, S [1 ]
Gissibl, B [1 ]
Natter, H [1 ]
Hempelmann, R [1 ]
Schaefer, HE [1 ]
机构：
[1] UNIV SAARLAND,D-66041 SAARBRUCKEN,GERMANY
来源：
NANOSTRUCTURED MATERIALS | 1997年 / 9卷 / 1-8期
关键词：
D O I：
10.1016/S0965-9773(97)00138-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The structure and thermal stability of electro-deposited nanocrystalline Pd was studied by means of positron lifetime spectroscopy, x-ray diffraction, and transmission electron microscopy. In comparision to nanocrystalline Pd prepared by gas-phase synthesis or severe plastic deformation, larger free volumes occur and the crystallite growth is retarded. The enhanced structural stability is attributed to solute atom drag and to nanovoids which are decorated with light impurities and which may act as pinning centers for the crystallite interfaces. (C) 1997 Acta Metallurgica Inc.
引用
收藏
页码：615 / 618
页数：4
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