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MME391 Ceramic Materials Asst. Prof. Dr. Ayşe KALEMTAŞ Bursa Technical University, Metallurgical and Materials Engineering Department Office Hours: firstname.lastname@example.org, email@example.com Yrd. Doç. Dr. Ayşe KALEMTAŞ Content of the Lecture Introduction to ceramic materials, description of ceramic materials properties, properties- microstructure-sintering process, brief history of ceramic materials, classification of ceramic materials. Ceramic crystal structures, bonds in ceramic materials Crystal structures, crystal directions and planes, ceramic crystal chemistry, ceramic crystal structures Phase equilibria and phase equilibrium diagrams in ceramics, phase rule, binary phase rule, one component, two component and three component systems, solid solutions, important phase diagrams Properties of ceramic materials, physical properties of ceramics, thermal properties of ceramics, mechanical properties of ceramics, toughening mechanisms. Electrical properties of ceramics, dielectrical, magnetic and optical properties Powder processing, ceramic raw materials; traditional ceramic raw materials; ceramic clays, kaolin, quartz, feldspar, wollastonite, talc, advanced ceramic raw materials; aluminum oxide, zirconium oxide Raw materials selection criteria, purity, particle size and reactivity, powder preparation and sizing, mechanical sizing, chemical sizing, mixing, reconsolidation, additives, spray drying, composition calculation Shape forming processes, pressing, step in pressing, selection of additives, uniaxial pressing, ısostatic pressing, application of pressing, casting, slip casting, extrusion, injection molding Densification, theory of sintering, sintering stages, sintering mechanism Control of conventional sintering, sintering atmosphere, time/temperature cycle, design of the furnace, sintering problems, hot pressing, hot ısostatic pressing, spark plazma sintering Yrd. Doç. Dr. Ayşe KALEMTAŞ References 1) Reed, J. S., ”Principles of Ceramic Processing” John Wiley&Sons, New York (1995). 2) Ring, T. A., "Fundamentals of Ceramic Powder Processing and Synthesis", Academic Press, San Diego (1996). 3) Hunter, R., “Introduction to Modern Colloid Science”, Oxford University Press (1993). 4) Rahaman, M. N., "Ceramic Processing and Sintering", Marcel Dekker Inc. (1995). 5) Hiemenz, P. C. and Rajagopalan, R., "Principles of Colloid and Surface Chemistry", Marcel Dekker Inc. (1997). 6) W.D. Kingery, H.K. Bowen, and D.R. Uhlmann, “Introduction To Ceramics”, John Wiley and Sons, 1976. 7) D. W. Richerson, "Modern Ceramic Engineering," Second Edition, Marcel Dekker Inc., (1992). Yrd. Doç. Dr. Ayşe KALEMTAŞ GRADING 1. Mid Term Exam: 20 % 2. Mid Term Exam: 30 % FINAL EXAM : 50 % Yrd. Doç. Dr. Ayşe KALEMTAŞ CLASSIFICATION OF MATERIALS Materials Metals Polymers Ceramics Composites Ceramic Materials Clay Advanced Glasses Refractories Abrasives Cements Products Ceramics Yrd. Doç. Dr. Ayşe KALEMTAŞ Historical Perspective Stone Age: 2.5 million years ago Pottery Age: 4000 B.C.E Copper Age: 4000 B.C.E – 3000 B.C.E. Bronze Age: 2000 B.C.E – 1000 B.C.E. Foundation of metallurgy- Alloys of copper and tin Iron Age: 1000 B.C.E – 1B.C.E. Plastics Age: late 20th Century to current time Semiconductor Age: late 20th Century to current time Yrd. Doç. Dr. Ayşe KALEMTAŞ What is "ceramic"? • from Greek meaning: "burnt earth" • non-metal, inorganic • Ceramic materials are inorganic compounds consisting of metallic and nonmetallic elements which are held together with ionic and/or covalent bonds. Yrd. Doç. Dr. Ayşe KALEMTAŞ What is "ceramic"? Ceramics are inorganic, nonmetallic, solids, crystalline, amorphous (e.g. glass), hard, brittle, stable to high temperatures, less dense than metals, more elastic than metals, and very high melting. Ceramics can be covalent network and/or ionic bonded. Yrd. Doç. Dr. Ayşe KALEMTAŞ What is "ceramic"? Bonding: Mostly ionic, some covalent. % ionic character increases with difference electronegativity.