期刊
JOURNAL OF MATERIALS RESEARCH
卷 18, 期 3, 页码 719-728出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1557/JMR.2003.0097
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This paper presents the results of a nanoindentation study of the effects of strain gradient plasticity on the elastic-plastic deformation of lithographie, galvanoformung, abformung (LIGA) Ni microelectromechanical systems (MEMS) structures plated from sulfamate baths. Both Berkovich and North Star/cube corner indenter tips were used in the study to investigate possible effects of residual indentation depth on the hardness of LIGA Ni MEMS structures between the micro- and nanoscales. A microstructural length scale parameter, l = 2.2 mum, was determined for LIGA nickel films. This is shown to be consistent with a stretch gradient length-scale parameter, l(s), of approximately 0.9 mum.
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