Significant shear mode softening in a c-axis tilt nanostructured hexagonal thin film induced by a self-shadowing effect

T. Yanagitani, M. Suzuki

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The mechanical properties of tilted AlN fiber structure caused by self-shadowing are investigated using gigahertz vibration induced through the piezoelectricity of AlN itself. We observed significant shear elastic softening in a highly tilted fiber nanostructure, but only a slight decrease in compressive elasticity. Abnormal 1/4 wavelength thickness mode resonance, indicating the decrease in the shear acoustic wave velocity, is reproducibly observed. We attribute this phenomenon to the weak fiber-to-fiber connection seen in a cross-sectional scanning electron microscopy image.

Original languageEnglish
Pages (from-to)724-727
Number of pages4
JournalScripta Materialia
Volume69
Issue number10
DOIs
Publication statusPublished - 2013 Nov 1
Externally publishedYes

Keywords

  • Acoustic methods
  • Nanocrystalline microstructure
  • Piezoelectricity
  • Shear mechanical properties
  • Sputtering

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

Fingerprint Dive into the research topics of 'Significant shear mode softening in a c-axis tilt nanostructured hexagonal thin film induced by a self-shadowing effect'. Together they form a unique fingerprint.

  • Cite this