Effects of silver-based metal electroplate on fatigue properties of PZT ceramics

Mitsuhiro Okayasu, Satoshi Aoki, Mamoru Mizuno

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The effects of silver-based metal plating for electrodes on the fatigue properties of PZT ceramics were examined. The plating was created on the surface of the PZT by a firing process carried out at approximately 973 K for several hours. Due to the high-temperature of the firing process, the silver-metal infiltrated the grain boundaries of the PZT matrix. This penetration made the PZT ceramics brittle and reduced the mechanical strength of the ceramics, e.g., hardness and bending strength. The fracture characteristics of this material are also attributed to the silver-based plated electrode; fractures of transgranular-type occurred near the electrode whilst fractures were intergranular in other areas. These changes of the fracture surface were influenced by the speed of crack growth arising from the roughness of the plated surface; a rough surface gives rise to transgranular fractures due to the high growth rate of the cracks. The roughness of the electroplated surface leads to a reduction in the mechanical and fatigue strength.

Original languageEnglish
Pages (from-to)1115-1124
Number of pages10
JournalInternational Journal of Fatigue
Volume30
Issue number6
DOIs
Publication statusPublished - Jun 1 2008
Externally publishedYes

Keywords

  • Electroplate
  • Fatigue strength
  • Fracture mechanics
  • Mechanical property
  • PZT ceramics

ASJC Scopus subject areas

  • Modelling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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