Development of Y-TZP/MWCNT-SiO2 nanocomposite for dental protheses
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Journal of the Mechanical Behavior of Biomedical Materials
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Y-TZP/MWCNT-SiO2 nanocomposite was synthesized by co-precipitation and hydrothermal treatment methods.
After the characterization of the MWCNT-SiO2 powder, specimens were obtained from the synthesized material
Y-TZP/MWCNT-SiO2 by uniaxial pressing for a second characterization and later comparison of its optical and
mechanical properties with the conventional Y-TZP. The MWCNT-SiO2 was presented in bundles of carbon
nanotubes coated by silica (mean length: 5.10 ± 1.34 μm /D90: 6.9 μm). The composite manufactured was
opaque (contrast ratio: 0.9929 ± 0.0012) and had a white color with a slightly difference from the conventional
Y-TZP (ΔE00: 4.4 ± 2.2) color. The mechanical properties of Y-TZP/MWCNT-SiO2: vickers hardness (10.14 ±
1.27 GPa; p = 0.25) and fracture toughness (4.98 ± 0.30 MPa m1/2; p = 0.39), showed no significant difference
from the conventional Y-TZP (hardness: 8.87 ± 0.89; fracture toughness: 4.98 ± 0.30 MPa m1/2). However, for
flexural strength (p = 0.003), a lower value was obtained for Y-TZP/MWCNT-SiO2 (299.4 ± 30.5 MPa) when
compared to the control Y-TZP (623.7 ± 108.8 MPa). The manufactured Y-TZP/MWCNT-SiO2 composite presented satisfactory optical properties, however the co-precipitation and hydrothermal treatment methods need to
be optimized to avoid the formation of porosities and strong agglomerates, both from Y-TZP particles and
MWCNT-SiO2 bundles, which lead to a significant decrease in the material flexural strength.
Como referenciar
SILVA, LUCAS H. da; RINALDI, LAURA A.; LAZAR, DOLORES R.R.; USSUI, VALTER; TANGO, RUBENS N.; BELLI, RENAN; LOHBAUER, ULRICH; CESAR, PAULO F. Development of Y-TZP/MWCNT-SiO2 nanocomposite for dental protheses. Journal of the Mechanical Behavior of Biomedical Materials, v. 143, p. 1-9, 2023. DOI: 10.1016/j.jmbbm.2023.105888. Disponível em: http://repositorio.ipen.br/handle/123456789/34069. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.