20.500.12556/RUL-174167 Termodinamična karakterizacija kompozita Al-Mg2Si diplomsko delo Thermodynamic characterization of Al-Mg2Si composite diploma work V letalstvu, energetskem sektorju, gradbeništvu in na podobnih področjih so od zgodnjih šestdesetih let naprej vse bolj zaželeni bolj togi in trdnejši materiali, ki so hkrati lahki. Vseh inženirskih zahtev ne moremo zagotoviti z enovitimi materiali, tako glede lastnosti kot tudi raznolikosti želenih lastnosti. Kompoziti, ki združujejo kombinacijo različnih materialov z različnimi lastnostmi in tvorijo enovito celoto, omogočajo uresničevanje ciljev in zahtev aplikacij z visoko zmogljivostjo, ker se lahko načrtujejo in konstruirajo glede na zaželene lastnosti. To predstavlja neposreden prikaz odvisnosti tehnološke razvitosti od izboljšav materialov. Zlitine in kompoziti na osnovi aluminija imajo široko uporabo kot inženirski materiali. Trdnost, temperaturna obstojnost, žilavost, oksidacijska odpornost in odpornost proti obrabi in lezenju so pogosto cilji pri armiranju kompozitov z aluminijevo matrico. V zadnjih letih so kompoziti z aluminijevo matrico (AMC), ojačani z ločenimi delci, pritegnili veliko zanimanja raziskovalcev zaradi svojih vrhunskih lastnosti in široke uporabe v industriji. Kompozit Al-Mg2Si lahko nadomesti tradicionalne Al-Si zlitine ter kompozite AMC tipa AlSiC/Al2O3. V sistemu Si-Mg nastaja intermetalna spojina Mg2Si v obliki delcev, ki izkazuje odlične fizikalne in mehanske lastnosti, kot so nizka gostota, visoka temperatura tališča, visoka trdota, velik modul elastičnosti ter nizek koeficient toplotnega raztezanja. Poleg tega je Mg2Si nestrupena, odporna proti koroziji, okolju prijazna in cenovno ugodna polprevodniška spojina. Tovrstni kompoziti se izdelujejo s preprostimi postopki litja, pri čemer se utrjevalna faza Mg2Si tvori ”in situ” med strjevanjem kot posledica interakcije med elementi. In the aerospace, energy, construction, and related sectors, there has been an increasing demand since the early 1960s for materials that are both stiffer and stronger, yet lightweight. It is not possible to satisfy all engineering requirements with monolithic materials, neither in terms of properties nor in terms of the diversity of desired characteristics. Composites, which combine multiple materials with distinct properties into a unified whole, enable the realization of high-performance application objectives and requirements, as they can be designed and engineered according to the desired properties. This provides a direct illustration of the dependence of technological advancement on material improvements. Aluminum-based alloys and composites find widespread use as engineering materials. Strength, thermal stability, toughness, oxidation resistance, and resistance to wear and creep are often primary targets when reinforcing composites with an aluminum matrix. In recent years, aluminum matrix composites (AMCs) reinforced with discrete particles have attracted considerable research interest due to their exceptional properties and broad industrial applicability. The Al-Mg₂Si composite has the potential to replace conventional Al-Si alloys and Al-SiC/Al₂O₃-type AMCs. In the Si-Mg system, the intermetallic compound Mg₂Si forms as discrete particles, exhibiting outstanding physical and mechanical properties such as low density, high melting temperature, high hardness, high elastic modulus, and low coefficient of thermal expansion. Moreover, Mg₂Si is non-toxic, corrosion-resistant, environmentally friendly, and a cost-effective semiconducting compound. Such composites are fabricated through straightforward casting processes, wherein the Mg₂Si strengthening phase forms in situ during solidification as a result of elemental interactions. kompoziti Al-Mg2Si sinteza homogenizacija termodinamika mikrostruktura Al-Mg2Si composites synthesis homogenisation thermodynamics microstructure true false false B. E. Karatay Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-09-29 09:44:04 2025-09-29 09:44:20 2025-11-19 03:33:29 0000-00-00 00:00:00 2025 0 Ljubljana 0 Ljubljana XII, 38 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 669 109187 256067587 27604.pdf 27604.pdf 1 80720EA448C8D74856B5478BC92A4F16 0e77d40e9cd24636e9a1a38fd5c42a6dae045a24160f24fd3a34d388fd3a6730 e9f9c965-9d07-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=218929 Naravoslovnotehniška fakulteta 0 0 0