RECENT STUDY ON THE RELATED PROBLEMS IN EVALUATION OF MECHANICAL PROPERTIES FOR MEMS MATERIALS

Author:

JIANG ZHUANGDE12,ZHOU XIANGYANG3,ZHU QIANG4,ZHAO ZEXIANG5,HAIRONG WANG1,PREWETT PHILIP D.2,JIANG KYLE2

Affiliation:

1. State Key Laboratory for Manufacturing System Engineering, at Xi'an Jiaotong University, No. 28 Xianning West Road, Xi'an, Shaanxi 710049, China

2. School of Mechanical Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK

3. Beijing University of Aeronautics & Astronautics, No. 37 Xueyuan Road, Beijing 100191, China

4. Zhengzhou University, No. 100 Science Road, Zhengzhou, Henan 450001, China

5. Zhongyuan University of Technology, No. 41 Zhongyuan Road, Zhengzhou, Henan 450007, China

Abstract

In order to obtain reliable evaluation result by nanoindentation, the related problems during measurement of the hardness and elastic modulus are investigated. Two quantitative approaches, i.e. calculating actual contact area and correcting contact depth errors, are proposed to deal with the significant pile-up errors for indentation on those ductile soft materials, especially thin soft metal films on hard substrates. The various influence factors during indentation are analyzed, and a new method for uncertainty estimation in hardness and elastic modulus is provided based on the random-fuzzy variables. Through the illustration of Au/glass-ceramic and Al/7059 glass, both the quantitative approaches are suitable for the elastically matching film-substrate systems. The measurement uncertainties in hardness and elastic modulus of Si(100) are effectively estimated, and all possible influencing effects on uncertainty can be involved.

Publisher

World Scientific Pub Co Pte Lt

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

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