Accession Number : ADA299289

Title :   Exposure of LDEF Materials to Atomic Oxygen: Results of EOIM-III.

Descriptive Note : Technical rept.,

Corporate Author : AEROSPACE CORP EL SEGUNDO CA TECHNOLOGY OPERATIONS

Personal Author(s) : Meshishnek, M. J. ; Jaggers, C. H. ; Hemminger, C. S.

PDF Url : ADA299289

Report Date : 15 JUL 1995

Pagination or Media Count : 35

Abstract : The third Effects of Oxygen Interaction with Materials (EOIM-III) experiment flew on STS-46 from July 31 to August 8, 1992. The EOIM-III sample tray was exposed to the low-earth orbit space environment for 58.55 h at an altitude of 124 nmi, resulting in a calculated total atomic oxygen (AO) fluence of 1.99 x 10(exp 20) atoms/sq cm. Five samples previously flown on the Long Duration Exposure Facility (LDEF) Experiment M0003 were included on the Aerospace EOIM-III experimental tray: (1) Chemglaze A276 white thermal-control paint from the LDEF trailing edge (TE); (2) Sl3GLO white thermal-control paint from the LDEF TE; (3) S13GLO from the LDEF leading edge (LE) with a visible contamination layer from the LDEF mission; (4) Z306 black thermal-control paint from the LDEF TE with a contamination layer from the LDEF mission; and (5) anodized aluminum from the LDEF TE with a contamination layer from the LDEF mission. The purpose of this experiment was twofold: (1) investigate the response of trailing-edge LDEF materials to atomic-oxygen exposure, thereby simulating LDEF leading-edge phenomena; and (2) investigate the response of contaminated LDEF samples to atomic oxygen in attempts to understand LDEF contamination/atomic-oxygen interactions. jg p.3

Descriptors :   *EXPOSURE(GENERAL), *OXYGEN, *CONTAMINATION, SIMULATION, EARTH ORBITS, SPACE ENVIRONMENTS, INTERACTIONS, LAYERS, MATERIALS, COMPOSITE MATERIALS, ATOMS, LONG RANGE(TIME), ALUMINUM, VISIBILITY, SAMPLING, LEADING EDGES, ANODIC COATINGS, LOW ALTITUDE, TRAILING EDGES.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Coatings, Colorants and Finishes
      Astronautics

Distribution Statement : APPROVED FOR PUBLIC RELEASE