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

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Abstract

3Y-TZP/3wt% Al2O3 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.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 81371183).

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Authors and Affiliations

  1. Medical School of Chinese PLA, Beijing, 100853, China

    Lei Zhou & Yan-fang Zhang

  2. Department of Stomatology, The First Medical Center, Chinese PLA General Hospital, Beijing, 100853, China

    Lei Zhou, Yan-fang Zhang & Se-fei Yang

  3. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China

    Pan Yi & Chao-fang Dong

  4. Journals Publishing Center, University of Science and Technology Beijing, Beijing, 100083, China

    Ying Wen

  5. Department of Medical Imaging, Air Force Medical Center, PLA, Beijing, 100142, China

    Li-min Meng

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  1. Lei Zhou
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  2. Yan-fang Zhang
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  3. Pan Yi
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  5. Chao-fang Dong
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Correspondence to Se-fei Yang.

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Zhou, L., Zhang, Yf., Yi, P. et al. Effects of BN content on the mechanical properties of nanocrystalline 3Y-TZP/Al2O3/BN dental ceramics. Int J Miner Metall Mater 28, 1854–1860 (2021). https://doi.org/10.1007/s12613-021-2324-0

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  • DOI: https://doi.org/10.1007/s12613-021-2324-0

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