Abstract
AbstractAlumina and zirconia toughened alumina ceramic were surface modified by alloying with a powder mixture consisting of 3Y‐ZrO2 and SiO2 using a CO2 laser. Tribological properties of the obtained multiphase microstructures were studied using a ring‐on‐plate laboratory tribometer under reciprocating sliding contact in the presence of distilled water, aqueous hydrochloric solution (HCl) and caustic soda (NaOH). Commercially available monolithic alumina ceramic (F99.7) and ZTA ceramic (SN80) were used as reference materials. The results showed a strong effect of surface finish and average sliding speed as well as the different media used on friction and wear. The occurrence of temporary friction peaks was connected with tribochemical reactions and initial surface cavities. Laser surface treatment resulted in ceramics of improved machinability and lower wear intensity compared with the commercial ceramics.
Published Version
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