Metal fusion bonding – Process – Metal to nonmetal with separate metallic filler
Patent
1976-08-27
1977-07-05
Smith, Al Lawrence
Metal fusion bonding
Process
Metal to nonmetal with separate metallic filler
228263, B23K 102
Patent
active
040335038
ABSTRACT:
A method for attaching a fused-quartz mirror to a conductive metal substrate which comprises the steps of tinning one surface of a fused-quartz mirror with a solder of substantially pure indium, tinning a metallic substrate with an indium eutectic alloy consisting essentially of indium, bismuth, lead and tin having a melting point substantially below that of indium, heating the eutectic alloy to a temperature substantially above its melting point, but below that of the solder, floating the mirror into place, and subsequently cooling the alloy to a temperature substantially below its melting point.
REFERENCES:
patent: 2746140 (1956-05-01), Belser
patent: 3100339 (1963-08-01), Bondley
patent: 3111741 (1963-11-01), Allen et al.
Fletcher James C. Administrator of the National Aeronautics and Space
McKeown Daniel
Sonnenschein George
Beumer J. H.
Manning John R.
Ramsey K. J.
Smith Al Lawrence
Wofford, Jr. L. D.
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