Abstract: A method of controlling bulk absorption of atomic hydrogen and facilitating degassing of hydrogen from a metal or metal alloy workpiece during heat treatments in furnaces with ambient and/or moisture-laden atmospheres, the method includes exposing the surface of the workpiece to an acidified inorganic salt solution or dispersion, with the inorganic salt of the solution containing a transition metal cation and a sulfate, phosphate or nitrate anion, before being subjected to said heat-treatment, said transition metal cation having an equal or positive standard reduction half-reaction potential relative to metal or metal alloy workpiece, the workpiece exposed to the acidified transition metal sulfate, phosphate or nitrate salt is subjected to a heat treatment.

Abstract: A method of controlling bulk absorption of atomic hydrogen and facilitating degassing of hydrogen from aluminum alloy workpieces during heat treatment in furnaces with ambient and/or moisture-laden atmospheres. The method includes exposing the surface of the workpieces to an acidified inorganic salt solution or dispersion, with the inorganic salt of the solution containing a transition metal cation and a sulfate, phosphate or nitrate anion, before being subjected to the heat treatment. The workpieces are next subjected to the heat treatment, and the acidified transition metal sulfate, phosphate or nitrate salt is used to substantially decrease the amount of atomic hydrogen entering the respective bulks of the workpiece during heat treatment and to facilitate removal of atomic and molecular hydrogen from the bulks of the workpieces.

Abstract: When a dispersion of oxide ceramic particles in certain volatile organic solvents is mixed with less than about 2 percent by weight (based on the weight of particles) of an oligomeric polysiloxanol dispersant, and the dispersion allowed to settle, the oligomer provides a multiplicity of OH groups, many of which are available for interactive bonding to the surfaces of the particles. The net result is that the particles settle more slowly; also, the sediment has a density higher than that of sediment from a dispersion of the same particles in the same solvent mixed with the monomeric silane from which the oligomer was formed. Exceptionally dense and strong "tape", for making sintered circuitized multilayered ceramic structures, is produced by capitalizing on this phenomenon. The effectiveness of the oligomer is predicated upon the prehydrolysis of the siloxane, prior to forming the dispersion.