Accession Number : ADB028686

Title :   High Temperature Bonding Techniques for Solar Cell Array.

Descriptive Note : Final rept. Mar 76-Jun 77,

Corporate Author : HUGHES AIRCRAFT CO LOS ANGELES CA SPACE AND COMMUNICATIONS GROUP

Personal Author(s) : LaFontaine, G. ; Marsh, F. ; Levin, H. ; Sinsheimer, F. ; Wolff, G.

Report Date : NOV 1977

Pagination or Media Count : 62

Abstract : An adhesive for solar cell attachment to spacecraft substrates has been sought with an unusually demanding combination of properties. These include (1) a basic resistance to decomposition at 600 C in vacuum, (2) retention of elastic properties at liquid nitrogen temperature, and (3) processibility as a bond line at conditions convenient to typical spacecraft fabrication. Of all the elastomeric materials available, the class of inorganic polymers termed poly (carboranesiloxanes) appears to be the only viable candidate. The ultrahigh molecular species of this group have been found to be attractive, especially when blended or alloyed with low molecular weight versions. This promising assessment is based on high temperature thermo-vacuum stability studies, various characterization measurements, elasticity measurements at cryogenic temperatures, and 45 peel studies of thermally cycled bond lines with varying adherend combinations. (Author)

Descriptors :   *SOLAR CELLS, *ADHESIVE BONDING, *SPACECRAFT, SUBSTRATES, DEGRADATION, VACUUM, ELASTIC PROPERTIES, LIQUID NITROGEN, LOW TEMPERATURE, INORGANIC POLYMERS, CARBORANES, SILOXANES, THERMAL STRESSES, PEEL STRENGTH, CRYOGENICS.

Subject Categories : Electric Power Production and Distribution
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE