CALORIMETRIC MEASUREMENTS OF THE THERMAL RELAXATION IN NANOCRYSTALLINE PLATINUM

被引：76

作者：

TSCHOPE, A

BIRRINGER, R

GLEITER, H

机构：

[1] Werkstoffwissenschaften, Universität des Saarlandes, D-6600 Saarbrücken, Fachbereich 15

来源：

JOURNAL OF APPLIED PHYSICS | 1992年 / 71卷 / 11期

关键词：

D O I：

10.1063/1.350560

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The enthalpy release during the heating of nanocrystalline platinum samples has been measured and at least two different contributions to the excess Gibbs free energy have been identified by controlling the grain size. About one half of the excess enthalpy is released during a first relaxation process without any measurable variation of grain size followed by a second relaxation which can be attributed to grain growth. The isothermal heat release of the grain growth is analyzed to calculate the excess grain boundary enthalpy.

引用

页码：5391 / 5394

页数：4

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