TY - JOUR
T1 - Microstructure, mechanical properties, and bone cell interactions of ZTA composites reinforced with BN
AU - Buyuker, Gokce Ata
AU - Tufan, Yigithan
AU - Kayan, Gizem Ozge
AU - Ercan, Batur
AU - Akin, Ipek
AU - Goller, Gultekin
N1 - Publisher Copyright:
© 2024 Elsevier Ltd and Techna Group S.r.l.
PY - 2024/5/15
Y1 - 2024/5/15
N2 - Due to their remarkable mechanical properties and biocompatibility, zirconia toughened alumina (ZTA) based composites are preferred materials for dental and orthopedic uses. This study focuses on the production and characterization of hexagonal boron nitride (BN) containing ZTA ceramics. To achieve this, we formulated composite systems with a composition of 70Al2O3-(30-x)YSZ-(x)BN (in vol%, where x ranges from 1 to 5). These mixtures were densified via spark plasma sintering (SPS) at a temperature of 1350 °C under a pressure of 40 MPa, with a dwell time of 5 min. The densification, resulting microstructure, and mechanical properties, including Vickers hardness and indentation fracture toughness, were thoroughly examined. All ZTA-BN composites achieved sintering densities exceeding 98.5% of their theoretical values. Incorporating BNs into ZTA composites increased fracture toughness by ∼55% while maintaining Vickers hardness values. Notably, crack deflection mechanism played a dominant role in toughening, particularly for the composite containing 3 vol% BNs. Furthermore, in vitro biocompatibility assessment of the YZTAB3 sample demonstrated that the composite had no cytotoxic effects towards human bone cells, indicating its potential for biomedical applications.
AB - Due to their remarkable mechanical properties and biocompatibility, zirconia toughened alumina (ZTA) based composites are preferred materials for dental and orthopedic uses. This study focuses on the production and characterization of hexagonal boron nitride (BN) containing ZTA ceramics. To achieve this, we formulated composite systems with a composition of 70Al2O3-(30-x)YSZ-(x)BN (in vol%, where x ranges from 1 to 5). These mixtures were densified via spark plasma sintering (SPS) at a temperature of 1350 °C under a pressure of 40 MPa, with a dwell time of 5 min. The densification, resulting microstructure, and mechanical properties, including Vickers hardness and indentation fracture toughness, were thoroughly examined. All ZTA-BN composites achieved sintering densities exceeding 98.5% of their theoretical values. Incorporating BNs into ZTA composites increased fracture toughness by ∼55% while maintaining Vickers hardness values. Notably, crack deflection mechanism played a dominant role in toughening, particularly for the composite containing 3 vol% BNs. Furthermore, in vitro biocompatibility assessment of the YZTAB3 sample demonstrated that the composite had no cytotoxic effects towards human bone cells, indicating its potential for biomedical applications.
KW - Bone cells
KW - Boron nitride
KW - In vitro tests
KW - Spark plasma sintering
KW - Zirconia toughened alumina
UR - http://www.scopus.com/inward/record.url?scp=85185610142&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2024.02.171
DO - 10.1016/j.ceramint.2024.02.171
M3 - Article
AN - SCOPUS:85185610142
SN - 0272-8842
VL - 50
SP - 16956
EP - 16964
JO - Ceramics International
JF - Ceramics International
IS - 10
ER -