(57) An article of manufacture, for example an electrical conductor, as on the surface
of a metal part an adherent, dense refractory keying layer and, on the keying layer
a further electrically insulating refractory layer that has been formed by a faster
deposition method.
The keying layer is preferably formed by a vacuum deposition processing, e.g. sputtering
evaporation, ionplat- ing or chemical vapour deposition, and the further refractory
layer is preferably formed by a sol-gel deposition method, plasma ashing method, a
solution coating method or a plasma spraying method. The articles are particularly
suitable for high temperature wires.
|
|
