Examination of Toughening Mechanisms of Zirconia Fabricated by Spark Plasma Sintering Methods

Keita Sudo; Tomoo Kudo; Hideaki Tsukamoto

doi:10.4028/www.scientific.net/KEM.907.124

Paper Titles

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One-Pot Synthesis of 2-Phenylquinoline-4-Carboxylic Acid: Iron(III) Trifluoromethanesulfonate Catalysed Doebner Reaction
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Research Progress in the Application of CuS Nanoparticles in Tumor Diagnosis and Treatment
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Protecting the Hull of High-Speed Crafts against Slamming Loads Using Hybrid Viscoelastic Layers
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Examination of Toughening Mechanisms of Zirconia Fabricated by Spark Plasma Sintering Methods
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Fabrication of Metal Matrix Composites with Thermally Unstable Reinforcements by Spark Plasma Sintering
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Compressive Strength Experiment of Honeycomb Sandwich Composite Panel
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Mechanical Analysis of Laminated Structures Consisting of Denim Fabric and Recycled HDPE / LDPE Bottle Caps
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Fabrication of Zirconia/ 304 Stainless Steel Functionally Graded Materials Using Centrifugal Slurry Methods and Spark Plasma Sintering
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Examination of Toughening Mechanisms of Zirconia Fabricated by Spark Plasma Sintering Methods

Abstract:

Ceramics/ metal functionally graded materials (FGMs) have been attracting much attention as composite materials that are intended for application to high-temperature structures. This study fucuses on toughening of ceramics and their matrix composites, which are building blocks of the FGMs. Partially stabilized zirconia (PSZ) with toughening additives such as Ni particles, Inconel fibers, SiC particles, SiC whiskers and a-alumina (Al₂O₃) particles were fabricated by spark plasma sintering (SPS). Toughening mechanisms were investigated based on their micro and macro-scale mechanical properties and microstructures. Disk bending tests, producing balanced biaxial loading conditions, were conducted probing bending strength at macro scales, while Vickers hardness tests were carried out to estimate fracture toughness and examine toughening mechanisms at micro scales. The results demonstrated that toughness of ZrO2 increased by adding Ni particles, Inconel fibers and Al₂O₃particles. Addition of Al₂O₃particles highly enhanced disk bending strength and deformability.