Effect of microstructure on the nanomechanical properties of Zn 1-x Cd x Se alloys

Hua Chiang Wen*, Chu Shou Yang, Wu-Ching Chou

*Corresponding author for this work

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

We present a study of the nanoindentation behavior of Zn 1-x Cd x Se epilayers grown using molecular beam epitaxy; the surface roughness, microstructure, and crystallinity were analyzed using atomic force microscopy, cross-sectional transmission electron microscopy, and X-ray diffraction; the hardness H and elastic modulus E were studied using nanoindentation techniques. We found that these highly crystalline materials possessed no stacking faults or twins in their microstructures. We observed a very marked increase in the value of H and a significant decrease in the value of E upon increasing the concentration of Cd, presumably because of an increase in the stiffness of the CdSe bond relative to that of the ZnSe bond. We observed a corresponding shrinkage of the contact-induced damage area for those films having a small grain size and a higher value of H. It appears that resistance against contact-induced damage requires a higher Cd concentration.

Original languageEnglish
Pages (from-to)2128-2131
Number of pages4
JournalApplied Surface Science
Volume256
Issue number7
DOIs
StatePublished - 15 Jan 2010

Keywords

  • Hardness
  • Nanoindentation
  • XTEM
  • ZnCdSe

Fingerprint Dive into the research topics of 'Effect of microstructure on the nanomechanical properties of Zn <sub>1-x</sub> Cd <sub>x</sub> Se alloys'. Together they form a unique fingerprint.

  • Cite this