Naslov
Sintering of Slip Cast Composite Al2O3- ZrO2 Ceramics

Autori
Sever, Ivana ; Ćurković, Lidija ; Žmak, Irena

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

Izvornik
Proceedings of TEAM 2018 ; 9th International Scientific and Expert Conference / Lalić, Bojan ; Tasić, Nemanja ; Gračanin, Danijela - Novi Sad : University of Novi Sad, Faculty of Technical Sciences, 2018, 99-104

ISBN
978-86-6022-098-3

Skup
9th International Scientific and Expert Conference (TEAM 2018)

Mjesto i datum
Novi Sad, Srbija, 10.10.2018. - 12.10.2018

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
alumina - zirconia composite ceramics ; slip casting ; stability ; rheology

Sažetak
Slip casting method can be used for forming monolithic and composite ceramics, in which a stable aqueous suspension of ceramic particles is poured into a plaster mould. Zirconia-toughened alumina composite ceramics possess many attractive properties such as high-temperature mechanical strength, wear resistance, low thermal conductivity and good thermal shock resistance. Compared to monolithic alumina ceramics, composite Al2O3-ZrO2 ceramics have enhanced fracture toughness and flexural strength due to the embedded zirconia grains in the alumina matrix. In this paper, waterbased suspensions with a total of 70 wt. % solid phase content (monolithic Al2O3 and composite Al2O3-ZrO2 ceramic suspensions) were prepared. The solid phase of composite ceramic suspensions consisted of either 1 or 10 dry weight base (dwb) % addition of zirconia (ZrO2) powder, and the rest was alumina powder. The used zirconia (ZrO2) powder was partially stabilized with the 3 mol % yttria (Y2O3). A dispersant (Dolapix CE 64) and a binder (polyvinyl alcohol - PVA) were added for the stabilization of water-based suspensions. The stability of 70 wt. % monolithic (Al2O3) and composite (Al2O3-ZrO2) ceramic suspensions was evaluated by rheological measurements and sedimentation tests. Suspensions were homogenized in a planetary ball mill and green bodies were prepared by slip casting of stable suspensions in a plaster mould. After the sintering, the density of the sintered monolithic and composite ceramic samples was measured and compared.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo, Temeljne tehničke znanosti

POVEZANOST RADA