| 摘要 |
A method of spray deposition in which an addition or reactant material is deliberately added for diffusion or reaction with a base material being atomised. The addition may be particles of a different metal, metal alloy, ceramic or a non-metallic material introduced into the stream or spray to form an alloying addition to the base material producing an alloy whose composition prevents successful production by conventional or powder metallurgic technology. Alternatively the addition may reduce by reaction the porosity in a forming deposit which would otherwise be present. In such a case the addition may be a reactive gas added to the atomising gas or a reactive material deliberately added to the base material to react with entrapped atomising gas. A reaction can also be initiated to cause evolution of a gas so that porous or foamed metal can be produced. |
