Collocated Tunable Wavenumber Sensor/Actuators for Smart Structures,

Abstract

Two of the three actuators (Two with Pt electrodes and one with Au/ Pt/Pd electrodes) which were burned out last month have been sintered. One was broken during CIPping and was unsalvagable. The other two were sintered without CIPping. The first actuator module broke during sintering due to either sticking to the crucible during shrinking or from thermal shock. The heating schedule used was 10 C/min to 900 C, 1 hour hold. 1 C/min to 1200 C, 3 hour hold, 1 C/min to 500 C. The second actuator madule was sintered at a slightly slower rate (3 C/min to 900 C, 1 hour hold, 1 C/min to 1200 C, 3 hour hold, 1 C/min to 300 C) and placed on a burned out endcap piece on the same composition as the actuator. This actuator module survived sintering without cracking (our first to date). Two actuator modules were made and put into burnout last month. One actuator module broke during CIPping. The second is awaiting CIPping. This actuator module can not be sintered without CIPping due to delaminations.

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Document Details

Document Type
Technical Report
Publication Date
Apr 08, 1994
Accession Number
ADA278145

Entities

People

  • Keith Bridger
  • Lori Jones

Organizations

  • Martin Marietta

Tags

DTIC Thesaurus Topics

  • Actuators
  • Buildings And Structures
  • Ceramic Materials
  • Contracts
  • Crucibles
  • Delamination
  • Electrodes
  • Fabrication
  • Materials
  • Shock
  • Sintering
  • Thermal Shock

Readers

  • Clinical Trial Research.
  • Robotics and Automation.
  • Thermal Physics or Thermal Science.