| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 810500 | Journal of the Mechanical Behavior of Biomedical Materials | 2016 | 7 Pages |
•β-CaSiO3 ceramics with Si3N4 addition were prepared by pressureless-sintering.•Si3N4 had great effect on the mechanical properties of the β-CaSiO3 ceramics.•β-CaSiO3 ceramics with 3 wt% Si3N4 revealed a flexural strength of 157.2 MPa.•Si3N4 can be used as sintering additive by being oxidized to form SiO2.
The motivation of this study is to investigate the effect of Si3N4 addition on the sinterability of β-CaSiO3 ceramics. β-CaSiO3 ceramics with different content of Si3N4 were prepared at the sintering temperature ranging from 1000 °C to 1150 °C. The results showed that Si3N4 can be successfully used as sintering additive by being oxidized to form SiO2. The β-CaSiO3 ceramics with 3 wt% Si3N4 sintered at 1100 °C revealed flexural strength, hardness and fracture toughness of 157.2 MPa, 4.4 GPa and 2.3 MPa m1/2 respectively, which was much higher than that of pure β-CaSiO3 ceramics (41.1 MPa, 1.0 GPa, 1.1 MPa m1/2). XRD analysis and SEM observation indicated that the main phase maintained to be β-phase after sintering.
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