Naslov
Comparison of Nickel and Cobalt Bonded Nanoscaled Hardmetals

Autori
Aleksandrov Fabijanić, Tamara ; Pötschke Johannes ; Mayer, Markus ; Škrinjarić, Irbas ; Kurtela, Marin

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceeding of Euro PM2019 Congress & Exhibition / European Powder Metallurgy Association (EPMA) / - , 2019

Skup
Euro PM2019 Congress & Exhibition

Mjesto i datum
Maastricht, Nizozemska, 13.10.2019. - 16.10.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Nanoscaled Hardmetals, Co, Ni, Mechanical Properties, Corrosion Resistance

Sažetak
Nanoscaled hardmetals show inferior properties regarding microstructure homogeneity, hardness, fracture toughness to hardness ratio, wear resistance and bending strength compared to conventional hardmetals with coarser grain size. Such novel hardmetals can be used for wear resistant applications as well as for applications where a high uniformity of mechanical properties (due to low defect size and defect density) is needed. However, besides superior mechanical properties, also erosion and corrosion resistance are required in chemical and petroleum industry where hardmetals parts are exposed to an aggressive environment. Conventional WC-Co hardmetals are characterized by poor corrosion resistance especially in acid media (pH ≤7) due to selective dissolution of the Co binder. Thus, studying another binder metal to increase the corrosion resistance is of common interest. Within this study, two nanoscaled hardmetal grades with nickel and cobalt were used as binder metals. The starting mixtures were prepared with the same binder content of 11 wt.% and the same size of the WC starting powder of around 150 nm. The samples were consolidated by sinter-HIP process and their properties were investigated and compared regarding the microstructure, mechanical properties and corrosion resistance.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Metalurgija, Rudarstvo, nafta i geološko inženjerstvo, Strojarstvo

POVEZANOST RADA