18 KB745 KB17 KB200020262001Delijić, KemalVukčević, MiraVuksanović, Darkoštevilka:3/4letnik:355 stranistr. 99-103ISSN:1580-2949COBISSID:278879URN:URN:NBN:SI:doc-Z7JGPJU1enInštitut za kovinske materiale in tehnologijeMateriali in tehnologijealuminijaluminumkompozitilastnostimetalurgija prahovojačitevThe correlation between the properties and the type of reinforcement in Al-matrix powder-metallurgy composites| Korelacija lastnosti in vrste ojačitve v matičnih kompozitih izdelani po metodi metalurgije prahu|Al-SiC particles (Al-SiC$_{p}$) composites were fabricated by the admixture method using an Al-coated reinforcement and atomised matrix powder. The microstructure of the samples in the hot-pressed condition with the homogeneously dispersed reinforcement was monitored. The use of a coated reinforcement to make composites by powder metallurgy (PM) methods was found to yield superior mechanical properties than the use of a mixture of reinforcement and matrix powder. The coated-reinforcement sample had lower porosity, increased hardness and a higher compressive yield strength. The coating diminished direct reinforcement-reinforcement contact and promoted sintering with a resulting low porosityKompoziti Al-SiC (SiC$_{p}$) so bili izdelani po metodi aditivnega mešanja iz ojačitve, prekrite z aluminijem, in vodno atomiziranega prahu. Mikrostruktura je bila preiskana po vročem stiskanju zlitine z enakomerno porazdeljeno ojačitvijo. Uporaba prekrite ojačitve za izdelavo kompozita po P/M-metodi daje boljše mehanske lastnosti kot uporaba zmesi prahu ojačitve in matične kovine. Manjša je poroznost, večja je trdota in večja je tlačna meja tečenja. Prekritje je zmanjšalo kontakt med zrni ojačitve in omogočilo sintranje z majhno poroznostjoTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije