Influence of Si3N4 content on the physical and mechanical properties of zirconia-toughened alumina (ZTA) ceramic composites
Year: 2019
Type: article
Abstract: The zirconia toughened alumina (ZTA) samples with different Si 3 N 4 additions which were uniaxial pressed and sintered at 160 °C for 3 h in no pressure, were studied. The Si 3 N 4 addition was varied from 0 wt% to 2.5 wt%. XRD and scanning electron microscopy showed that the Si 3 N 4 addition affected the phase composition and microstructure. The fracture toughness and hardness of the composite are characterized by the Vickers indentation method. The results show that the mechanical properties are associated with the addition of Si 3 N 4 . The maximum value of Vickers hardness (1454 HV) and fracture toughness (8.06 MPa.√m) was measured from the sample with 1 wt% Si 3 N 4 additions. However, the Al 6 Si 2 O 13 phase was obtained when the contents of additional Si 3 N 4 excess 1 wt%. This will cause significantly decreasing of the mechanical properties of the ZTA-Si 3 N 4 composite.
Source: Materials Research Express
Authors: Pan Tan, Peng Wu, Lei Gao, Yudong Sui, Yehua Jiang
Institution: Kunming University of Science and Technology
Language: English
Subfield: Ceramics and Composites
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2921135686