1585 KB19 KB200020242013Er, YusufErdogan, AzmiGök, Mustafa SabriKaraoglanli, Abdullah CahitKorkut, Mehmet HorikKüçük, Yilmazletnik:47številka:6str. 695-699COBISSID:1024682ISSN:1580-2949URN:URN:NBN:SI:doc-BU9JWQQ6enInštitut za kovinske materiale in tehnologijeMateriali in tehnologijeabrasive grain sizeceramic coatingkeramična prevlekamicro-abrasionmikroabrazijavelikost abrazijskih zrnEffect of the abrasive grit size on the wear behavior of ceramic coatings during a micro-abrasion test| Vpliv velikosti brusnih zrn na vedenje keramičnih prevlek pri mikroabrazijskem preizkusu obrabe|Micro-abrasion tests are commonly used to perform the wear tests on hard coatings. In this study, AISI 1040 mild-steel specimens were coated with ceramic coatings including oxides with different hardness values. The free-ball micro-abrasion testing method was used to examine the wear behavior of the ceramic surfaces over different test durations. The coating-hardness measurements were carried out with a micro-hardness tester. In the experimental studies, the SiC abrasive particles with three different grain sizes (800, 1000 and 1200 mesh), were used to explore the effect of the abrasive particle size on the wear ratio of ceramic coatings. The abrasive effect of the SiC particles in the abrasive slurry was evaluated by examining the SEM micrographs of the coating surfaces. According to the test results, the sample surface coated with Cr2O3 exhibited a higher wear resistance than those covered with Al2O3 and its compositions with TiO2. It can also be concluded from the results that an increase in the percentage of the TiO2 powders in the Al2O3 mixture leads to a decrease in the wear resistanceZa preizkušanje obrabe trdih prevlek se navadno uporablja mikroabrazijski preizkus. V tej študiji so bili vzorci mehkega jekla AISI 1040 prevlečeni s keramično prevleko iz različno trdih oksidov. Za ugotavljanje vedenja keramičnih površin pri obrabi z različnim trajanjem preizkusa je bila uporabljena metoda mikroabrazijskega preizkusa s tremi prostimi kroglami. Trdota prevleke je bila izmerjena z merilnikom mikrotrdote. Pri eksperimentih so bili za ugotavljanje vpliva velikosti abrazijskih delcev na obrabo keramične prevleke uporabljeni abrazijski delci SiC s tremi različnimi velikostmi (zrnatost 800, 1000 in 1200). Abrazijski učinek SiC-delcev in abrazijskih odpadkov je bil ocenjen in preiskan s SEM-posnetki površine prevleke. Glede na rezultate imajo vzorci, prekriti s Cr2O3, večjo odpornost proti obrabi kot vzorci z Al2O3 in njihova kombinacja s TiO2. Iz rezultatov se lahko tudi ugotovi, da povečanje deleža TiO2 v mešanici z Al2O3 povzroči zmanjšanje odpornosti proti obrabiTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije