657 KB24 KB200020242014Kosec, TadejaMočnik, Petraštevilka:4letnik:48str. 467-472ISSN:1580-2949COBISSID:2061671URN:URN:NBN:SI:doc-HJP4HMSTenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijeelectrochemical impedance spectroscopyelektrokemijska impedančna spektroskopijanickel alloysnikljeve zlitinepasivna plastpassive filmsimulated salivatitan alloystitanove zlitinetribo-corrosiontribokorozijaumetna slinaTribo-corrosion properties of a NiTi dental wire| Tribokorozijske lastnosti dentalne žice NiTi|NiTi-alloy archwires are used in dental medicine for tooth positioning. Failures are reported during the mounting and operation. It is supposed that these difficulties are results of a simultaneous presence of corrosion and mechanical wear. First, a corrosive medium was examined in order to simulate the conditions in the mouth. Different simulated body fluids were compared with natural saliva using electrochemical methods. The corrosion properties ofthe NiTi dental wire in the as-received state and without the surface oxide film were studied with electrochemical impedance spectroscopy. Tribo-corrosiontests of NiTi in artificial saliva were performed and a relation between the chemical and mechanical wear was studied. After the experiment, the surface was spectroscopically examined. The relation between the chemical and mechanical wear was determinedŽice zlitine NiTi se uporabljajo v dentalni medicini za oblikovanje zobnega loka. Med namestitvijo in uporabo se večkrat pojavijo pretrgi. Domneva se, da je vzrok sočasna korozija in mehanska obraba. Raziskava je bila najprej usmerjena v iskanje primernega korozivnega medija, ki nadomešča razmere v ustih. Z elektrokemijskimi metodami smo primerjali več različnih sintetičnih slin z vzorcem naravne sline. Korozijski preizkusi dentalne žice NiTi z oksidno plastjo (dostavljen vzorec) v primerjavi z žico brez oksidne plasti sobili izvršeni z elektrokemijsko impedančno spektroskopijo. Tribokorozijski preizkusi v umetni slini so pokazali odnos med kemijskim in mehanskim prispevkom obrabe. Po eksperimentu je bila površina spektroskopsko pregledana.Določena je bila odvisnost med kemijsko in mehansko obraboTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije