Effects of BN content on the mechanical properties of nanocrystalline 3Y-TZP/Al2O3/BN dental ceramics

3Y-TZP/3wt% Al 2 O 3 powder was coated with varying amounts of BN using the urea and borate reaction sintering method, and then multiphase ceramics were prepared by hot pressing sintering. The micro-topography and the compositional analysis of synthesized ceramics were conducted through scanning ele...

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Bibliographic Details
Published in:International journal of minerals, metallurgy and materials metallurgy and materials, 2021-11, Vol.28 (11), p.1854-1860
Main Authors: Zhou, Lei, Zhang, Yan-fang, Yi, Pan, Wen, Ying, Dong, Chao-fang, Meng, Li-min, Yang, Se-fei
Format: Article
Language:English
Subjects:
Activated sintering
Aluminum oxide
Bend strength
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Corrosion and Coatings
Diamond pyramid hardness
Electron microscopy
Fracture toughness
Glass
Hot pressing
Materials Science
Mechanical properties
Metallic Materials
Microscopy
Natural Materials
Sintering
Sintering (powder metallurgy)
Surfaces and Interfaces
Synthesis
Tetragonal zirconia polycrystals
Thin Films
Tribology
Urea
X-ray diffraction
Yttria-stabilized zirconia
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Summary:3Y-TZP/3wt% Al 2 O 3 powder was coated with varying amounts of BN using the urea and borate reaction sintering method, and then multiphase ceramics were prepared by hot pressing sintering. The micro-topography and the compositional analysis of synthesized ceramics were conducted through scanning electron microscopy, transmission electron microscopy and X-ray diffraction. A mechanical tester was used to analyze the Vickers hardness, fracture toughness, and bending strength of the synthesized ceramics. The results showed that the ceramic with a BN content of 12wt% showed the best processability, but had diminished mechanical properties (such as fracture toughness and bending strength). The ceramic with a BN content of 9wt% showed better processability than those with 3wt% and 6wt% BN. However, the fracture toughness was affected by the addition of 9wt% BN, making this ceramic only usable as a base material for a three-unit fixed bridge. In contrast, the ceramics with a BN content of 3wt% or 6wt% fulfilled the criteria for use in multi-unit restoration, but their low processability made them unsuitable for milling after sintering.
ISSN:1674-4799
1869-103X
DOI:10.1007/s12613-021-2324-0