Metal fusion bonding – Process – Bonding nonmetals with metallic filler
Patent
1990-12-17
1992-06-02
Heinrich, Samuel M.
Metal fusion bonding
Process
Bonding nonmetals with metallic filler
228190, 228208, 22826321, 148527, B23K 3100, B23K10316
Patent
active
051180251
ABSTRACT:
A method for fabricating a titanium aluminide composite structure consisting of a filamentary material selected from the group consisting of silicon carbide, silicon carbide-coated boron, boron carbide-coated boron, titanium boride-coated silicon carbide and silicon-coated silicon carbide, embedded in an alpha-2 titanium aluminide metal matrix, which comprises the steps of providing a beta-stabilized Ti.sub.3 Al foil containing a sacrificial quantity of beta stabilizer element in excess of the desired quantity of beta stabilizer, fabricating a preform consisting of alternating layers of foil and a plurality of at least one of the aforementioned filamentary materials, and applying heat and pressure to consolidate the preform. In another embodiment of the invention, the beta-stabilized Ti.sub.3 Al foil is coated on at least one side with a thin layer of sacrificial beta stabilizer. The composite structure fabricated using the method of this invention is characterized by its lack of a denuded zone and absence of fabrication cracking.
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Eylon Daniel
Revelos William C.
Smith, Jr. Paul R.
Bricker Charles E.
Heinrich Samuel M.
Singer Donald J.
The United States of America as represented by the Secretary of
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