20.500.12556/DKUM-38316 ŠTUDIJ VISOKOTEMPERATURNE OKSIDACIJE NERJAVNEGA JEKLA EN X12CR13 Z MERITVIJO ELEKTRIČNE UPORNOSTI STUDY OF HIGH TEMPERATURE OXIDATION OF STAINLESS STEEL EN X12CR13 WHIT REAL-TIME MEASURING OF ELECTRICAL RESISTIVITY V magistrski nalogi je opisan proces visokotemperaturne oksidacije jekla X12Cr13 v zračni atmosferi in pri mejnih temperaturah uporabnosti zasledovan z metodo sprotnega merjenja električne upornosti ter analiziran s karakterizacijo mikrostrukturnih sprememb, ki pri tem nastanejo. Z meritvijo električne upornosti smo določili kinetiko visokotemperaturne oksidacije pri različnih temperaturah in časih v zračni atmosferi. Za analizo nastalih oksidnih plasti smo uporabili metodi vrstične elektronske mikroskopije in Augerjeve elektronske spektroskopije. Rezultati raziskovalnega dela so pokazali, da kemijske reakcije in procesi, ki potekajo pri visokotemperaturni oksidaciji nerjavnih jekel, povzročijo zaznavne spremembe električne upornosti, ki jih lahko uporabimo za identifikacijo in določitev kinetike teh reakcij in procesov. S to metodo lahko tudi določimo čas do razpada zaščitnega oksidnega filma pri mejnih temperaturah uporabnosti jekla. In the master thesis the process of high temperature oxidation of steel X12Cr13 in standard atmosphere and with border line temperatures usage applied with method of real-time measurement of electrical resistance and analyzed with description of microstructural changes that occur during the process. With the measurement of electrical resistance kinetics of high temperature oxidation has been defined at different temperatures and times in the standard atmosphere. For analyzing purpose of oxidation layers different methods have been used such as method of scanning electronic microscopy and Auger’s electronic spectroscopy. The results of the research thesis have showed that chemical reactions and processes that occur at high temperature oxidation of stainless steel results as detectable changes of electrical resistance which are subsequently used for identification and determination of kinetics of reactions and processes. With this method we can also determine the time to dissolution of the protective oxide layer at border line temperatures for steel usability. visokotemperaturna oksidacija nerjavna jekla jeklo X12Cr13 high temperature oxidation stainless steel steel X12Cr13 true true false [D. Kolar] Slovenski jezik Angleški jezik Magistrsko delo 2012-09-23 23:13:04 2012-10-23 11:06:20 2022-04-26 11:25:49 2021-04-19 03:23:45 2012 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 669.14:620.193.3(043.3) 16471062 URN:SI:UM:DK:LPMLOFDO MAG_Kolar_David_2012.pdf MAG_Kolar_David_2012.pdf 1 7EC38A42563A68146255C94F359CD08B 24843c7dfbe3751da030075e89047a99632f65ceeec0fc74e62ea99a1d1f2afc 789accb9-7c08-11eb-bb7a-00155d0001ca 20.500.12556/dkum/eb293970-1eea-46ac-9346-4c6549daefb2 https://dk.um.si/Dokument.php?lang=slv&id=52042 Fakulteta za strojništvo 0 0 0