Abstract
In this study feasibility of cold spraying to produce ceramic coatings is investigated. Ceramic coatings have high potential for various industrial applications. A main problem with these coatings is undesirable phase transformations caused by high temperatures, as in conventional thermal spraying methods. There have so far been few examples of successful cold spraying of ceramics. This work is to examine the problem further by synthesizing specially tailored porous powders, using the sol-gel method. The powders were sprayed on different substrates using a cold spray system. The deposits were characterized by optical and scanning electron microscopy. Based on the results, a discussion of the optimal powder characteristics for cold spraying of ceramics is presented.
