|SCIENTIFIC DISCIPLINARY SECTOR||CHIM/03|
Main objective of this course is the description of properties and characteristics of inorganic materials on the basis of relations between structure, microstructure and chemical and physical properties. Moreover correlation between contitutional properties and behaviour in service under different conditions are described.
General characteristics of 2-component phase diagrams. Three-component phase diagrams. Gibbs triangle. Isothermal and isoplethal sections. Liquidus projections, primary solidification areas, solidification process. Isomorphous ternary systems. Two- and three-phase fields. Invariant ternary equilibria. Reaction scheme (Scheil diagrams). Examples of real ternary intermetallic and ceramic systems. Higher order systems.
Ceramic materials. Classification. Crystal structures: CsCl, NaCl, wurtzite, sfalerite, spinel, rutile, alumina, fluorite, perowskite, ecc. Silicates and their structures: ortosilicates, sorosilicates, ciclosilicates, fillosilicates, … SiO2 strucrures. Feldspar e zeolites. Kaolinite, Halloysite, Kyanite, Montmorillonite, … . Phase diagrams of ceramic systems: SiO2, SiO2-Al2O3, Fe2O3-SiO2, MgO-SiO2, CaO-MgO, CaO-SiO2, MgO-SiO2-Al2O3, K2O-SiO2-Al2O3, … Classical ceramics: earthenware, stoneware, porcellain, ... Advanced eramics: carbides, nitrides, borides, oxides, ....
Phase transitions: nucleation and growth, spinodal decomposition. Nucleation rate, growth rate, Avrami equation. Homogeneous and heterogeneous nucleation. Growth mechanisms: diffused and planar interface, nucleation controlled and diffusion controlled growth. T-T-T diagrams. Structure of glasses. Network formers e network modifiers. Phase diagrams for vitreous systems. Glass transition temperature. amorfous metals.
Introduction to Ceramics, 2nd Edition, by W. David Kingery, H. K. Bowen, Donald R. Uhlmann
Didactic material distributed by the teacher
Office hours: Every day, on appointment.
According to the timetable reported in https://chimica.unige.it/didattica/orari_CTC
All class schedules are posted on the EasyAcademy portal.
Final oral exam. The oral exam is always conducted by two tenured teachers, lasts at least 30 minutes and focuses on all the topics covered in class. At the student's choice, it can consist of: a) several questions posed by teachers on the topics covered in class or b) seminar held by the student on a topic agreed with the teacher and a few questions posed by teachers on the topics covered in class
With the methods described above, given that at least one of the two teachers has many years of exams experience in the discipline, the commission is able to verify with high accuracy the achievement of the educational objectives of the teaching. When these are not reached, the student is invited to deepen the study and to make use of further explanations by the lecturer. The CCS guarantees the correspondence between the topics of the exam and those actually carried out during the course. To this end, the teacher in charge makes the detailed program public at the beginning of the lessons (on a site called the web room reserved for teachers and students of the University).