Abstract: A method and a waterjet machine for removing or stripping a ceramic coating from a substrate, especially from a metallic coating onto the substrate, using a pure waterjet without any additions. The method includes providing a water source and a nozzle for ejecting a jet of pure water onto the surface of a coated substrate; providing a substrate coated at least with a ceramic coating; positioning the nozzle and the substrate to one other such that a machining angle can be determined between the waterjet and the surface of the coated substrate at the location of impingement of the water jet onto the local coating surface; ejecting a pure waterjet by the nozzle impinging the ceramic coating for removing essentially or completely the ceramic coating from the substrate or from the metallic coating.

Abstract: The aim of the invention is to produce complete high temperature fuel cells by means of thermal injection processes (e.g. atmospheric plasma injection, vacuum plasma injection, high speed flame injection). The production method is especially simplified and is economical by virtue of the fact that the carrier substrate is also produced on a base with the aid of a thermal injection method. The base or an intermediate layer placed thereon can be advantageously dissolved or decomposed such that the carrier substrate provided with layers arranged thereon can be separated in a very simple manner from the base which becomes unnecessary. Said method advantageously enables the production of all layers of a high temperature fuel cell, exclusively with the aid of a thermal injection method.