P.R.I.M.E. Surface Coating - A Novel Technique of Applying Thick Ceramic Coatings

摘要

The present study focuses on the development of a novel ceramic coating technique. This novel method uses a mixture comprising a fine grade alumina powder and reactive cyanoacrylate monomer as a binder. This paper describes the outcome of an experimental investigation into mixing, application, and debinding of the coating mixtures. The subsequent sintering phase will form the basis for a subsequent paper. Polymerisation of the alkoxyethyl cyanoacrylate is inhibited during the mixing stage by means of dissolving Para-tolune sulfonic acid and is initiated in a controlled manner after application of the coating using caffiene powder. Coatings up to one mm in thickness have been successfully deposited onto aluminum and alumina substrates. SEM micrographs show good uniformity of the coating and that succesful adhesion can be achieved, as also shown by the joint shear strength test results. The versatile properties of cyanoacrylates suggest that there are potential applications for the coating at the cured stage. This paper also presents the results of debinding of the cyanoacrylate binder, prior to sintering the alumina coating.