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 poboljÅ¡ana CuCrZr legura primenom metalurgije praha (PM). Korišćene su PM tehnike mehaniÄko legiranje, hladno presovanje i sinterovanje. Komercijalno proizvedeni predlegirani CuCrZr prahovi su mehaniÄki legirani 5 sati u inertnoj atmosferi argona korišćenjem visokoenergetskog mlina (Turbula mikser) sa kuglama razliÄitih veliÄina. MehaniÄkim legiranjem (ML) postignuto je povećanje gustine dislokacija matrice bakra, Å¡to dovodi do povećanja tvrdoće nakon densifikacije. Strukturni parametri (veliÄina kristalita, naprezanje i parametri reÅ¡etke) ML prahova i kompakta su ispitivani pomoću rendgenske difrakcije. Dobijeni rezultati pokazuju smanjenje veliÄine kristalita i parametra reÅ¡etke Cu matrice nakon ML. Dalje, XRD analiza je potvrdila prisustvo CuZr ojaÄavajućih Äestica nakon sinterovanja. Mikrostrukturna analiza i distribucija ojaÄavajućih Äestica Cu matrice izvrÅ¡ena je primenom SEM i XRD. Merenja tvrdoće su pokazala da in situ formiranje CuZr unutar Cu matrice povećava vrednosti tvrdoće za 45% u poreÄ‘enju sa vrednostima tvrdoće Äistog bakra.
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