High cost of production and brittle character of ceramics will restrict the application of bulk ceramics in industry to a certain extent. For this reason, ceramic coatings onto materials which are cheap and reliable in shock, such as steel, aremore widely employed. Wear and corrosion can be reduced by an effective method which is protection of the metallic components by ceramic–metallic (cermet) coatings or hard oxide coatings.Such coatings are produced by thermal spray technologies.The microstructures of the coatings applied by a thermal spray technique are usually inhomogeneous. Discontinuities, such as pores, oxide lamellas or incompletely molten spray particles are typically present in sprayed materials. As a result, the coatings produced by different spray processes such as thermal and atmospheric plasma spray (APS) techniques havevarious microstructure and properties. Wear beavior of Cr2O3 coatings show that compared with the base oil, oleic acid, glycol oleate and dibutyl phosphite have a friction-reducing function but sulphurized olefin does not; a remarkable wear resistance is observed for dibutyl phosphite and oleic acid but not for glycol oleate and sulphurized olefin.The concentration of these additives has a great influence on the wear behavior of the Cr2O3 coating but little influence on the friction behavior.
本文由桑尧热喷涂网收集整理。本站文章未经允许不得转载；如欲转载请注明出处，北京桑尧科技开发有限公司网址：http://www.sunspraying.com/
|
