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Primary Examiner: Smith, Al Lawrence
Assistant Examiner: Ramsey, K. J.
Attorney: Del Ponti; John D.

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Title: Method of fabricating a filament-reinforced composite article

Abstract: A filament-reinforced composite article is fabricated from monolayer boron fiber tapes and laminates of titanium. The tapes which have the boron fibers attached to an aluminum foil are positioned in a multi-ply layup with interleaved titanium laminates in the form of foils or screening. The layup is subjected to heat and pressure in a diffusion bonding process to compact the layup materials and bond the fibers in the matrix of aluminum and titanium. The titanium in the matrix improves the impact load resistance of the article by improving ductility and impact strength.

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Inventors: Rothman, Edward A. (South Glastonbury, CT, US)

Application Number: 525573
Filing Date: 1974-11-20
Publication_date: 1977-03-08
Assignee: United Technologies Corporation (Hartford, CT)
Primary Class(es): 228/190 228/193, 228/262.21, 428/189, 428/293.4, 428/450, 428/457, 428/593, 428/607, 428/608, 428/621, 428/627, 428/635, 428/651
Other Classes:
US Patent Ref:

3218704	Nov, 1965	Kraus et al.	29/498.
3575783	Apr, 1971	Kreider	29/191.
3699623	Oct, 1972	Kreider	29/498.
3748721	Jul, 1973	Alexander	29/471.

Other Refs: Other References: Garret et al. Broad Applications of Diffusion Bonding, NASA CR-409, Wash. D.C., 1966, pp. 177 and 162.
Niemann, J. T. and Garrett, "Eutectic Bonding of Boron-Aluminum Structural Components", 54th AWS Annual Meeting, Chicago, Ill., Apr. 2-6, 1973. Published in the Welding Journal Research Supplements: (Part I), Apr. 1974, pp. 175s-184s, and (Part II), Aug. 1974, pp. 351s-360s.
Broutman & Krock, Composite Materials, vol. IV, Metallic Matrix Materials, edited by Kreider, Academic Press, NY, 1974, pp. 420-421.