20.500.12556/RUL-141312 Izdelava in karakterizacija sestavljenega ulitka iz magnezijeve in cinkove zlitine ter soli diplomsko delo Manufacturing and characterization of composed casting from Mg and Zn alloys and salts diploma work V okviru diplomske naloge smo izdelali zahtevne sestavljene ulitke iz magnezijeve in cinkove zlitine, pri čemer smo kompleksno notranjo makrostrukturo izoblikovali s pomočjo soli. Uporabili smo sol iz NaCl, natančne granulacijske sestave z visoko stopnjo enakomernosti. Za litje smo nameravali uporabiti vakuumski način polnjenja livne votline, kasneje pa se je izkazalo, da je bilo gravitacijsko litje uspešnejše. V prvi fazi smo za posamezne granulacije soli izvedli sintranje le-te v naprej pripravljeni kvarčni celici, sledilo je instrumentiranje livne votline s termočlenom ter priprava fleksibilne cevi od kvarčne cevi do peči. Talina je bila izdelana v elektrouporovni peči, sledilo je ogrevanje kvarčne cevi (celice) na želeno temperaturo, pri kateri je bilo izvedeno litje. Na ta način smo uspešno izvedli izdelavo preiskovanih sestavljenih ulitkov. Aplikacija, ki je mogoča, je povezana z izdelavo kompleksnih spojnih v telesu samorazgradljivih elementov, ki se uporabljajo za travmatološke povezave porušenih kosti. V okviru podobnih sistemov se predvideva, da bi bilo navedeno znanje koristno za zmanjšanje časa okrevanja po operaciji, zato ob odstranitvi povezovalnih elementov dodaten poseg ne bi bil potreben. Z opisano tehniko pridobljeni vzorci so bili metalografsko preiskani s pomočjo optične in/ali elektronske mikroskopije. Izvedli smo tudi računalniško tomografijo (CT). As part of the diploma thesis, we produced complex composite castings from magnesium and zinc alloys, in which the complex internal macrostructure was created with the help of salt. We used NaCl salt, a precise granulation composition with a high degree of uniformity. For casting, we intended to use the vacuum method of filling the casting cavity, but later it turned out that gravity casting was more successful method. In the first phase, sintering was performed for individual salt granulations in a pre-prepared quartz cell, followed by instrumentation of the casting cavity with a thermocouple and preparation of a flexible tube from the quartz tube to the furnace. The melt was made in an electric furnace, followed by heating the quartz tube (cell) to the desired temperature at which the casting was performed. In this way, we successfully performed the production of investigated composite castings. The application that is possible is related to the production of complex connective, self-degrading elements in the body, which are used for traumatological connections of broken bones. Under similar systems, it is considered that this knowledge would be useful to reduce the recovery time after surgery, and in the case of removal of the connecting elements, no additional intervention would be necessary. The samples obtained by the described technique were metallographically examined by means of optical and / or electron microscopy. We also performed computed tomography (CT). magnezij cink litje samorazgradljivost metalografija rentgen računalniška tomografija magnesium zinc casting self-degradability metallography X-ray computed tomography true false false [N. Pečnik] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2022-09-28 09:01:16 2022-09-28 09:01:22 2022-11-29 12:29:55 0000-00-00 00:00:00 2022 0 Ljubljana 0 Ljubljana X, 26 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 669 88542 131482371 12458.pdf 12458.pdf 1 FD4912DC53F197E367584A5C6D73C050 f5571b89af7880dc48824268fa614d07270b91428bcb2832fe44e3257a428c92 5a9ecd7b-3efb-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=162309 Naravoslovnotehniška fakulteta 0 0 0