14 KB1324 KB13 KB200020242012Marek, IvoMejzlíková, LucieMichalcová, AlenaNovák, PavelVojtěch, Daliborletnik:46številka:6str. 559-562ISSN:1580-2949COBISSID:955050URN:URN:NBN:SI:doc-GEJZKSECenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijeintermetallicsintermetalne zlitinepowder metallurgyprašna metalurgijareactive sinteringreaktivno sintranjeReactive-sintering production of intermetallics| Izdelava intermetalnih zlitin z reaktivnim sintranjem|Intermetallic phases offer a large variety of interesting properties, such as high-temperature oxidation resistance, creep resistance, special magnetic properties, shape memory or the ability to store hydrogen reversibly. However, the practical utilization of this group of materials is very limited due to problematic production. Casting is commonly applied to produce many of these materials, even though there are strong limitations of this technology, such as high melting points and poor casting properties. Powder metallurgy involving the reactive sintering of compressed mixtures of elemental powders is one of the promising alternative production routes. In this work, the preparation of several technically important intermetallics was tested. Aluminide- and silicide-based high-temperature materials and NiTi shape-memory alloys were successfully produced with this techniqueIntermetalne faze imajo vrsto zanimivih lastnosti, kot so visoka temperaturna odpornost za oksidacijo, odpornost proti lezenju, posebne magnetne lastnosti, oblikovni spomin ter sposobnost reverzibilnega shranjevanja vodika. Vendar pa je praktična uporaba te vrste materialov močno omejena zaradi njihove problematične izdelave. Ulivanje se uporablja pri številnih teh zlitinah za njihovo proizvodnjo, čeprav obstajajo omejitve pri tej tehnologiji, kot so visoke temperature tališča in slaba livnost. Ena od obetajočih mogočih poti za njihovo proizvodnjo je prašna metalurgija, ki vključuje reakcijsko sintranje stisnjenih mešanic elementnih prahov. V tem delu je bila preizkušena izdelava več tehnično pomembnih intermetalnih zlitin. S to tehniko so bili uspešno izdelani visokotemperaturni materiali na osnovi aluminidov in silicidov ter zlitina NiTi s spominomTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije