期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 16, 期 28, 页码 14808-14812出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cp01881h
关键词
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资金
- National Natural Science Foundation of China [50972017, 21371023]
- Research Foundation for the Doctoral Program of Higher Education of China
Silicon nitride microsprings with superelasticity are characterized using SEM, XRD, TEM and microRaman methods. The internal structure and the superelastic mechanism of silicon nitride microsprings are proposed through analyzing the variation of Raman peaks upon stretching gradually. During the stretching process, since all the vibrations are internal vibrations within the primitive unit cell, the basic structure has no changes and the residual stress never concentrates. The special structure of the fine grains and no sharp grain boundaries make the silicon nitride microsprings possess such good superelastic properties.
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