Isplativa proizvodnja legure CuCrZr primenom metalurgije praha
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http://orcid.org/0000-0003-4474-0257
Jelena Stašić
http://orcid.org/0000-0002-3900-3298
Dušan Božić
http://orcid.org/0000-0002-0556-4708
Andrijana Žekić
http://orcid.org/0000-0001-7720-5846
Milica Milojević
http://orcid.org/0000-0001-8535-4788
Jovana Ružić
http://orcid.org/0000-0002-8076-0012
Apstrakt
Legura CuCrZr predstavlja aktuelan materijal sa potencijalnom primenom kao konstrukcioni materijal u budućim fuzionim reaktorima. Cilj ovog istraživanja je da se proizvede poboljšana CuCrZr legura primenom metalurgije praha (PM). Korišćene su PM tehnike mehaničko legiranje, hladno presovanje i sinterovanje. Komercijalno proizvedeni predlegirani CuCrZr prahovi su mehanički legirani 5 sati u inertnoj atmosferi argona korišćenjem visokoenergetskog mlina (Turbula mikser) sa kuglama različitih veličina. Mehaničkim legiranjem (ML) postignuto je povećanje gustine dislokacija matrice bakra, što dovodi do povećanja tvrdoće nakon densifikacije. Strukturni parametri (veličina kristalita, naprezanje i parametri rešetke) ML prahova i kompakta su ispitivani pomoću rendgenske difrakcije. Dobijeni rezultati pokazuju smanjenje veličine kristalita i parametra rešetke Cu matrice nakon ML. Dalje, XRD analiza je potvrdila prisustvo CuZr ojačavajućih čestica nakon sinterovanja. Mikrostrukturna analiza i distribucija ojačavajućih čestica Cu matrice izvršena je primenom SEM i XRD. Merenja tvrdoće su pokazala da in situ formiranje CuZr unutar Cu matrice povećava vrednosti tvrdoće za 45% u poređenju sa vrednostima tvrdoće čistog bakra.
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