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By: Bangshidhar Goswami.
Assistant Professor of Metallurgical Engineering, RVS College of Engineering and Technology, Jamshedpur, Jharkhand, India
This study investigates the characteristics and fabrication techniques of laminated ceramic composites, focusing on various glass-ceramic systems, including alumina, BaTiO3/Al2O3, and LiO2‐ZrO2‐SiO2‐Al2O3 (LZSA). The inherent brittleness of ceramics, attributed to surface flaws and their limited toughness, necessitates the development of layered structures to enhance mechanical reliability. Layered ceramics demonstrate improved fracture toughness, crucial for applications in aerospace, biomedicine, and military armor. Techniques such as tape casting, electrophoretic deposition, and advanced sintering methods, including hot press, spark plasma, and cold sintering, are employed to fabricate and strengthen these materials.This research also explores the integration of bionic principles into ceramic lamination, revealing improvements in toughness and defect resistance. Specifically, the development of BaTiO3/Al2O3/ZrO2 laminates through electrophoretic deposition demonstrates potential in energy harvesting applications by utilizing residual stress and the piezoelectric effect. Additionally, glass infiltration techniques, using commercial glass systems such as MgO- B2O3-SiO2 and PbO-B2O3-SiO2, are optimized to bond different ceramic layers effectively, reducing defects and enhancing structural integrity. The study further examines the thermal, mechanical, and dielectric properties of LZSA glass- ceramic composites, modified with ZrSiO4 and nano-Al2O3 to control the thermal expansion coefficient (TEC) and improve microstructural properties. The findings present a comprehensive understanding of ceramic lamination techniques, highlighting the significance of sintering processes and material composition in enhancing the performance and applicability of ceramic laminates across various industries.
Citation:
Refrences:
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