20.500.12556/DKUM-66576 Mechanical properties and microstructure characterisation of Au-Pt dental alloy Mehanička svojstva i mikrostrukturna karakterizacija Au-Pt dentalne slitine Development of a dental alloy with high Au content is based on the ternary system of Au-Pt-Zn with a nominal composition of 86,9Au-9,9Pt-1,5Zn, and about 1,5 wt.% micro-alloying elements (In, Ir, Rh). The results analyses of different heat-treated states showed that the optimal mechanical properties and hardness of an Au-Pt-Zn alloy can be reached with combinations of heat treatment for 20 minutes at 723 K and then slowly cooling, if the alloy was annealed at 1223 K for 30 minutes and the water quenched. Research results confirmed that the microstructure of the Au-Pt-Zn alloy consists of two phases: α1-phase rich in Au (main phase) and α2-phase rich in Pt (minor phase). During XRD analysis and use of the Rietveld method, it was found that the α1-phase content is about 98,5 wt.% while the content of α2-phase is 1,5 wt.%. STA analyses show that the Au-Pt-Zn alloy has a solidus temperature of about 1292 K and a liquidus temperature of about 1412 K. Razvoj dentalne slitine s visokim sadržajem zlata zasnovan je na ternarnom sustavu Au-Pt-Zn s nominalnim sastavom 86,9Au-9,9Pt-1,5Zn i oko 1,5 mas. % mikrolegirajučih elemenata (In, Ir, Rh). Rezultati analize su pokazali da se u slučaju slitine odžarene kod 1223 K u trajanju od 30 minuta i zakaljena u vodi optimalna mehanička svojstva i tvrdoća Au-Pt-Zn slitine mogu postići kombinacijom toplinske obrade na 720 oC u trajanju 20 minuta s naknadnim sporim hlađenjem. Rezultati istraživanja su potvrdili da se mikrostruktura Au-Pt-Zn slitine sastoji od dvije faze: α1-faze bogate sa zlatom (primarna faza) i α2 - faze bogate s platinom (sekundarna faza). Tijekom XRD analize i primjenom Rietveldove metode utvrđeno je da je sadržaj α1-faze oko 98,5 mas. %, dok je sadržaj α2-faze iznosio oko 1,5 mas. %. STA analiza je pokazala da je Au-Pt-Zn slitina imala solidus temperaturu oko 1292 K, a likvidus temperaturu oko 1412 K. Au dental alloy properties microstructure characterization Au dentalne zlitine lastnosti mikrostruktura karakterizacija true false true Angleški jezik Hrvaški jezik Znanstveno delo 2017-07-03 13:38:39 2017-07-03 13:39:49 2022-08-01 12:56:00 2019-07-11 15:52:01 2008 0 0 str. 317-323 št. 4 Letn. 47 2008 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1334-2576 669 524301593 827487 1334-2576 URN:SI:UM:DK:ZO87I0UC Metalurgija_2008_Rudolf_et_al._Mechanical_properties_and_microstructure_characterisation_of_Au-Pt_dental_alloy.pdf Metalurgija_2008_Rudolf_et_al._Mechanical_properties_and_microstructure_characterisation_of_Au-Pt_dental_alloy.pdf 1 7AEC6EC5836B6DD2B6014C432D442838 86c8066387fb046e4ccf2a514352f3810af044a09138980ffe891c4332e3b889 56df2ec2-7c0e-11eb-bb7a-00155d0001ca 20.500.12556/dkum/0a0f82d3-ac7a-4af9-9763-272cabae1c9c https://dk.um.si/Dokument.php?lang=slv&id=113499 http://hrcak.srce.hr/26040 1 https://dk.um.si/Dokument.php?lang=slv&id=113498 Fakulteta za strojništvo 0 0 0