Abstract: A thermoplastic brazing alloy composition contains a particulate brazing alloy and a flux dispersed in a petroleum wax to form a solid suspension at room temperatures. Preferred petroleum waxes are paraffin wax and microcrystalline wax. On application to a workpiece and heating to brazing temperatures, the wax melts and leaves the brazing site and then volatilizes without leaving any carbonaceous residue and without causing any bubbling or blistering. The use of petroleum waxes is particularly useful when the flux contains a reactive material such as fluoroborate, a silicofluoride or an aluminofluoride.

Abstract: This invention relates to metal powders. In particular, the invention provides a novel metal-refractory composite powder which will withstand high temperatures, and means for its production. The metals for which the invention will have special application are platinum, palladium, rhodium, ruthenium, iridium, osmium and gold and silver.According to the invention, a metal powder suitable for use at high temperatures comprises an intimate mixture, other than a mere physical admixture, of particles of platinum, palladium, rhodium, ruthenium, iridium, osmium, gold or silver, or an alloy containing one or more of said metals, and particles of a refractory material.

Abstract: This invention relates to metal powders which will withstand high temperatures and which can be used for decorative and catalytic purposes. In more detail, a metal powder in accordance with the invention comprises particles made from a heat resistant substrate individually coated or encapsulated with a layer of platinum, palladium, rhodium, ruthenium, iridium, osmium, gold or silver or an alloy containing at least one of the said metals.