Details

Autor(en) / Beteiligte

• Li, He
• Liu, Yongsheng
• Li, Wenbo
• Liu, Yansong
• Zeng, Qingfeng

Titel

Effect of zirconia content and particle size on the properties of 3D‐printed alumina‐based ceramic cores

Ist Teil von

• Journal of the American Ceramic Society, 2021-11, Vol.104 (11), p.6015-6028

Ort / Verlag

Columbus: Wiley Subscription Services, Inc

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Alumina‐based ceramic cores are used to manufacture the internal structures of hollow alloy blades, requiring both high precision and moderate properties. In this work, zirconia is regarded as a promoter to improve the mechanical properties of sintered ceramic. The effect of zirconia content and particle size on the microstructure and mechanical properties of ceramics was evaluated. The results indicate that the flexural strength of sintered ceramics reached the maximum of 14.5 ± 0.5 MPa when 20 wt% micron‐sized (10 μm) zirconia (agglomerate size, consistent with the alumina particle size) was added, and 26.5±2.5 MPa when 15 wt% 0.3 μm zirconia was added. Zirconia with submicron‐sized (0.3 μm) particles effectively filled the pores between alumina particles, thus leading to the maximum flexural strength with a relatively low content. The corresponding sintered ceramics had a bulk density of 2.0 g/cm3 and open porosity of 59.6%.