Preparation and strengthening mechanism of prestressed ceramic tile components

To improve the flexural strength of ceramic tiles, a surface strengthening method is presented in this work. By cofiring coating and substrate, residual compressive stress is introduced in the coating. The phase composition and morphological characteristics of coating materials and the influences of...

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Bibliographic Details
Published in:International journal of applied ceramic technology 2022-01, Vol.19 (1), p.604-611
Main Authors: Sun, Yi, Wu, Tianye, Bao, Yiwang, Li, Yueming, Wan, Detian, Li, Kai, He, Lingfeng
Format: Article
Language:English
Subjects:
Ceramic coatings
ceramic tiles
Ceramics industry
coating
Compressive properties
Flexural strength
Industrial applications
Loose powder sintering
Phase composition
Porcelain
pressureless sintering
prestressed components
Protective coatings
Strengthening
Substrates
Thermal expansion
Thickness
Tiles
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Summary:To improve the flexural strength of ceramic tiles, a surface strengthening method is presented in this work. By cofiring coating and substrate, residual compressive stress is introduced in the coating. The phase composition and morphological characteristics of coating materials and the influences of coefficient of thermal expansion (CTE) and coating thickness on the flexural strength have been investigated. The prestressed ceramic tile is prepared by pressureless sintering a green body coated with a low CTE coating at 1200°C. The CTE of green body and optimal coating is 7.85 × 10−6°C−1 and 5.69 × 10−6°C−1, respectively. The flexural strength of prestressed porcelain tiles (89 ± 3 MP) has been increased by 102% when the coating thickness is 67 µm compared to their uncoated counterpart (44 ± 3 MPa). This simple surface strengthening method of ceramic tiles is cost‐efficient and economical for large‐scale industrial applications.
ISSN:1546-542X
1744-7402
DOI:10.1111/ijac.13757