Skip to main content Accessibility help

Modification of Optical Surfaces Employing CVD Boron Carbide Coatings

  • Richard A. Lowden (a1), Laura Riester (a1) and M. Alfred Akerman (a1)


Non-reflective or high emissivity optical surfaces require materials with given roughness or surface characteristics wherein interaction with incident radiation results in the absorption and dissipation of a specific spectrum of radiation. Coatings have been used to alter optical properties, however, extreme service environments, such as experienced by satellite systems and other spacecraft, necessitate the use of materials with unique combinations of physical, chemical, and mechanical properties. Thus, ceramics such as boron carbide are leading candidates for these applications. Boron carbide was examined as a coating for optical baffle surfaces. Boron carbide coatings were deposited on graphite substrates from BCl3, CH4, and H2 gases employing chemical vapor deposition (CVD) techniques. Parameters including temperature, reactant gas compositions and flows, and pressure were explored. The structures of the coatings were characterized using electron microscopy and compositions were determined using x-ray diffraction. The optical properties of the boron carbide coatings were measured, and relationships between processing conditions, deposit morphology, and optical properties were determined.



Hide All
1. Seals, R. D., Egert, C. M., and Allred, D. D., “Advanced Infrared Optically Black Baffle Materials,” SPIE Vol.1330, Optical Surfaces Resistant to Severe Environments, 164177 (1990).
2. Smith, W. J., Modern Optical Engineering, 2nd Edition, McGraw-Hill, Inc., New York, 139142 (1990).
3. Kuhl, M., Gindele, K., and Mast, M., “Determination of the Characterizing Parameters of Rough Surfaces for Solar Energy Conversion,” SPIE Vol.653, Optical materials Technology for Energy Efficiency and Solar Energy Conversion, 228235 (1986).
4. Pompea, S. M., Shepard, D. F., and Anderson, S., “BRDF Measurements at 6328 Angstroms and 10.6 Micrometers of Optical Black Surfaces for Space Telescopes,” SPIE Vol.967, Stray Light and Contamination in Space, 236247 (1988).
5. Besmann, T. M. and Abdel-Latif, A. Ismail, “Modification of Optical Properties with Ceramic Coatings,” Thin Solid Films 202, 5159 (1991).
6. Samsonov, G. V. and Vinitski, I. M, Handbook of Refractory Compounds, IFI-Plenum, New York, 117185 and 273–277, (1980)
7. Vandenbulcke, L. G., “Theoretical and Experimental Studiers on the Chemical Vapor Deposition of Boron carbide,” Ind. Eng. Chem. Prod. Res. Dev. 24, 568575 (1985).
8. Stinton, D. P., Besmann, T. M., and Lowden, R. A., “Advanced Ceramics by Chemical Vapor Deposition Techniques,” Ceramic Bulletin 67 [2], 350355 (1988).
9. Jansson, U., Carlsson, J.-O., Stridh, B., Soderberg, S., and Olsson, M., “Chemical Vapor Deposition of Boron Carbides I: Phase and Chemical Composition,” Thin Solid Films 124, 101107 (1985).
10. Kevill, D. N. and Rissmann, T. J., “Preparation of Boron-Carbon Compounds, Including Crystalline B2C Material, By Chemical Vapor Deposition,” J. Less-Common Metals 117, 421425 (1986).
11. Besmann, T. M, “Chemical Vapor Deposition in the Boron-Carbon-Nitrogen System,” J. Am. Ceram. Soc. 73 [8], 24982501 (1990).

Modification of Optical Surfaces Employing CVD Boron Carbide Coatings

  • Richard A. Lowden (a1), Laura Riester (a1) and M. Alfred Akerman (a1)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed