SUBATHMOSPHERIC PRESSURE PLASMA SPRAYING OF SUPERCONDUCTIVE CERAMIC

摘要

A method and a system for producing a superconductive ceramic article. The method comprises maintaining a spray chamber at subatmospheric pressure, operating a plasma spray gun with a plasma-forming gas to produce a plasma spray stream directed towards a substrate in the spray chamber, selecting a partial pressure of oxygen, introducing sufficient oxygen into the spray chamber to maintain the selected partial pressure therein and feeding a superconductive oxide ceramic composition into the spray stream such as to produce a ceramic article in the form of a superconductive oxide coating on the substrate.