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Accession Number:
ADA278145
Title:
Collocated Tunable Wavenumber Sensor/Actuators for Smart Structures,
Corporate Author:
MARTIN MARIETTA LABS BALTIMORE MD
Report Date:
1994-04-08
Abstract:
Two of the three actuators Two with Pt electrodes and one with Au PtPd 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 Cmin to 900 C, 1 hour hold. 1 Cmin to 1200 C, 3 hour hold, 1 Cmin to 500 C. The second actuator madule was sintered at a slightly slower rate 3 Cmin to 900 C, 1 hour hold, 1 Cmin to 1200 C, 3 hour hold, 1 Cmin 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.
Supplementary Note:
DOI: 10.21236/ADA278145
Pages:
0004
Contract Number:
N00014-92-C-0214
File Size:
0.13MB
