Infiltration Systems

• Wetting and Infiltration of Porous Tungsten and Molybdenum by Liquid Gallium, A.V. Ivanov, T.S. Ivanova, L.I. Kostenetskaya, Y.I. Smirnov, and M.M. Churakov, Sov. Powder Metall. Met. Ceram., Vol 23 (No. 56-58), 1984. Electrical contacts with a solid skeleton of tungsten or molybdenum have been produced by liquid gallium infiltration. Specimens are compacted under a pressure of 390 MPa and sintered for 2 h in hydrogen at 1400 and 1200 °C, respectively, with resulting porosities of 38 and 44%. Wetting experiments are carried out in helium, hydrogen, or vacuum. An intermetallic compound and sintered moldybdenum layers that formed at 600 °C prevented gallium infiltration.

• Kinetic Laws for Infiltration of Porous Titanium by Lead and Indium Melts, A.A. Kurilko, G.A. Kurshev, V.A. Rudyuk, and Y.V. Naidich, Sov. Powder Metall. Met. Ceram., Vol 23, 1984, p 686-689. This process is similar to active soldering of nonmetallic oxide materials. A molten solder (e.g., tin, lead, or indium) infiltrates and spreads over its surface. The work is aimed at studying the kinetics of infiltration of titanium powders by two metallic melts: indium and lead.

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