Coating processes – Coating by vapor – gas – or smoke – Metal coating
Patent
1990-05-16
1991-09-17
Beck, Shrive
Coating processes
Coating by vapor, gas, or smoke
Metal coating
427250, 427252, 427253, 4272551, 4272552, 427314, 427431, 427432, 4274342, 4274346, C23C 1630, C23C 1638, C23C 1602, C23C 212
Patent
active
050494198
ABSTRACT:
A method for manufacturing a precursor wire for a CFRM material, which comprised a continuous carbon fiber bundle of carbon filaments as a reinforcement and a metal as a matrix. In a pretreatment process, the fiber bundle with a sizing agent adhered thereto is passed through an inert atmosphere at a temperature in the range of from 350.degree. to 800.degree. C., thereby thermally decomposing the sizing agent, the chemical structure of the sizing agent including ether linkages, and a residue of thermal decomposition containing the ether linkages is left on the surface of each single filament. In a chemical vapor deposition process, a material gas containing a titanium compound and a boron compound and a reducing gas containing zinc are caused to act simultaneously on the fiber bundle at a temperature in the range of from 700.degree. to 800.degree. C. after the sizing agent is thermally decomposed, thereby forming a primary layer of oxides of titanium and boron on each of the single filaments, and a surface layer of titanium and boron is formed on the primary layer. The primary layer and the surface layer serve considerably to improve the wettability between the carbon fibers and the matrix metal.
REFERENCES:
patent: 3860443 (1975-01-01), Lachman et al.
patent: 3894863 (1975-07-01), Lachman et al.
patent: 4082864 (1978-04-01), Kendall et al.
patent: 4097624 (1978-06-01), Schladitz
patent: 4145471 (1979-03-01), Kendall et al.
patent: 4223075 (1980-09-01), Harrigan, Jr. et al.
"Failure Modes in Composites", IV, p. 301 in a publication of the Metallurgical Society of AIME, 1979.
Hanano Tohru
Hotta Tohru
Kyono Tetsuyuki
Beck Shrive
Burke Margaret
Toray Industries Inc.
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