کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1448855 988685 2008 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nanoindentation of single-crystalline gold thin films: Correlating hardness and the onset of plasticity
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Nanoindentation of single-crystalline gold thin films: Correlating hardness and the onset of plasticity
چکیده انگلیسی

Understanding the mechanical properties of materials with external dimensions on the nanometer scale is crucial for the design and fabrication of nanoelectronics and nanosystems. Metal thin films exhibit a size-dependent hardening effect that scales inversely with the film thickness down to 200 nm. The thickness range below 200 nm is mostly unexplored and initial experiments indicate a change in the scaling law. Here, the mechanical properties of single-crystalline Au films are investigated in the thickness range from 31 to 858 nm by nanoindentation. Maximum shear stresses at the onset of plasticity are determined by the finite element method. While the hardness increases with decreasing film thickness, as expected from macroscopic experiments, the onset of plasticity shifts to lower shear stresses for thinner films. These observations are interpreted with respect to detailed observations of the microstructures of the films investigated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 56, Issue 15, September 2008, Pages 3887–3899
نویسندگان
, , , ,