Electrolysis: processes – compositions used therein – and methods – Electrolytic material treatment
Patent
1995-05-09
1998-01-27
Valentine, Donald R.
Electrolysis: processes, compositions used therein, and methods
Electrolytic material treatment
205704, 205723, 264 16, 433226, 433227, 419 35, 419 39, 419 42, 419 44, 419 61, 427570, 148513, 148514, C25F 100, B22P 100, A61C 504
Patent
active
057118663
ABSTRACT:
A metallic composite solid, containing alloys and/or intermetallics, is formed by compacting at moderate pressure a mixture of powder particles, foils or sheets at a temperature close to room temperature, well below the melting temperature of the constituent components and without the addition of low melting metals such as mercury, indium or gallium acting as a sintering agent. This low temperature consolidation of the powder mixture is enhanced by having the surface oxide of the powder particles removed, prior to consolidation, and/or by coating the particles with an oxide-replacing metal such as silver or gold. The coating process may be replacement reactions, autocatalytic reduction or electrolytic reduction. The composite formation is assisted by the addition of a liquid acid such as fluoroboric acid, sulfuric acid, fluoric acid, adipic acid, ascorbic acid, or nitric acid. A preferred embodiment of the process for metal solid composite formation is a process for forming dental restorative materials at ambient temperatures and under pressure exerted by manual dental instrumentation.
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Beane Glenn L.
Dariel Moshe P.
Eichmiller Frederick C.
Giuseppetti Anthony A.
Johnson Christian E.
The United States of America as represented by the Secretary of
Valentine Donald R.
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