Nazeer Mohammed, Ajit Kumar Naik, D. K. V. D Prasad, Lava Kumar Pillari, Lukas Bichler, Tapas Laha, Siddhartha Roy
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Influence of B4C content and particle size on the mechanical properties of Al2O3-B4C composites
Alumina (Al2O3) ceramics and their composites are widely used in the cutting tool industries due to their superior mechanical properties. This study presents a comprehensive investigation of the influence of B4C content and particle size on the sinterability, microstructure, and mechanical properties of Al2O3-B4C composites fabricated using Spark Plasma Sintering (SPS). The relative density of the composites increased and residual porosity decreased as the B4C particle size in the powder blends decreased. The addition of B4C particles improved the mechanical properties of monolithic Al2O3 and the highest property enhancements were obtained for the composite with 30 vol% of the finest B4C particles. For this composition, with respect to monolithic Al2O3, the density was reduced by 11% and hardness, Young's modulus, indentation fracture toughness, and flexural strength increased by 24%, 8%, 51%, and 88%, respectively. The effect of the B4C particle size on the Young's modulus in relation to existing micromechanical models reveals that the composites with a fine B4C particles fit the Reuss model.
期刊介绍：
The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas:
Nanotechnology applications;
Ceramic Armor;
Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors);
Ceramic Matrix Composites;
Functional Materials;
Thermal and Environmental Barrier Coatings;
Bioceramic Applications;
Green Manufacturing;
Ceramic Processing;
Glass Technology;
Fiber optics;
Ceramics in Environmental Applications;
Ceramics in Electronic, Photonic and Magnetic Applications;
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