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Electron Beam Cured Composites for Cryogenic Tanks
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English
Abstract
In the frame of military programmes, AEROSPATIALE, developed, for ballistic missiles (motor cases wound structures), an original process of composites curing. This process, now utilized on an industrial basis is the Electron Beam Curing (EBC, sometimes called ionization, or irradiation curing). EBC is based on the composite's resin polymerization caused by its exposure under a powerful enough electron beam.
Originally, this process was developed for costs saving reasons, as an economical alternative to the conventional thermal curing process. This objective having been achieved, an other incentive was found to the use of such a technology. As a matter of fact, this process offers the outstanding advantage of being a “room temperature” process. The electron beam acts directly on resins molecular structure to bring about its polymerization, no heating of the part is necessary. Thus, the usual problems encountered with conventional thermal curing (differential expansions of tools, or metallic inserts, exothermal reactions inside the composites, to recall the main ones) are eliminated or drastically alleviated. Hence, designs of composite parts, which were “forbidden” with conventional thermally cured composites are now feasible.
Authors
Citation
Parrot, P., "Electron Beam Cured Composites for Cryogenic Tanks," SAE Technical Paper 951722, 1995, https://doi.org/10.4271/951722.Also In
References
- Ref 1: Aerospatiale internal note G. Vendroux
- Ref 2: Will E.T. “Screening program to select a resin for gravity probe B composites” Cryogenics 1992 32 179
- Ref 3: Pannkoke K. et al. “Fatigue properties of unidirectional carbon fiber composites at cryogenic temperatures” Cryogenics 1991 31 248
- Ref 4: Ahlborn K. “Durability of carbon fiber reinfoced plastics with thermoplastic matrices under cyclic mechanical and cyclic thermal loads at cryogenic temperatures” Cryogenics 1991 31 257