Politecnico di Torino
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Politecnico di Torino
Academic Year 2017/18
02CFTLS
Science and technology of ceramic materials
1st degree and Bachelor-level of the Bologna process in Materials Engineering - Torino
Teacher Status SSD Les Ex Lab Tut Years teaching
Montanaro Laura ORARIO RICEVIMENTO PO ING-IND/22 70 30 0 0 4
SSD CFU Activities Area context
ING-IND/22 10 B - Caratterizzanti Ingegneria dei materiali
Subject fundamentals
This course deals with ceramic science and technology and, in the frame of the third year of this educational path, together with the modules devoted to other relevant families of materials (Metals, Polymers, Functional materials,..) it is aimed to supply specialized competences and professionalizing skills
Expected learning outcomes
The main aim of this course is to supply student with a robust background on ceramic materials, providing them the scientific knowledge to understand the relations among structure, nano/microstructure and performances of this class of materials. In addition, some tailoring tools available during the design of the components thanks to the control of the microstructural features as well as of the ceramic process parameters are supplied. As an example some ceramic materials relevant for their industrial applications are discussed.
Prerequisites / Assumed knowledge
Materials Science & Technology
Contents
Introduction and a brief summary to the main properties of ceramic materials with respect to the other families of materials.
Some examples of the structure of crystalline oxide and non-oxide ceramics (alumina, zirconia, titania, silica, silicates, garnets, perovskites, spinels, nitrides and oxynitrides, carbides and borides).
Ceramic powders: compositional, surface, morphological, granulometrical expected features. Synthesis routes: solid-state, liquid-phase, vapour-phase syntheses. Powder features vs. synthesis routes. Processing of ceramic powders: grinding and mixing; process adjuvants (surfactants; deflocculants; binders; plasticizers;...). Granulation. Powder packing. Suspensions: wettability; agglomeration; stability of colloidal suspensions; rheology of suspensions. Forming: dry, wet, pastes. Cold or hot pressing; casting technologies; tape casting; extrusion; injection moulding. Drying and Debinding.
Sintering. Thermodynamics and kinetics aspects of sintering. Diffusion mechanisms, particularly solid-state diffusion. Shrinkage and porosity evolution. Grain growth and its control. Solid-state sintering. Sintering in the presence of a transitory liquid-phase. Pressure-sintering. Sintering aids. Surface finishing.
Properties of ceramics and their dependence from composition/structure/microstructure.
Thermal properties: heat capacity; thermal expansion; thermal conductivity; creep resistance; thermal shock resistance.
Mechanical properties: basic approach to fracture mechanics of brittle materials. Elastic constants; hardness; compressive and flexural strength. Fracture toughness and R-curve behavior. Weibull modulus. Toughening mechanisms for ceramics. Wear behavior. Introduction to other properties (optical,..). Brief description of few traditional ceramics having a relevant industrial market (binders; refractories;...).
Delivery modes
Fundamentals of science and technology of ceramic materials (60 hrs)
Transport mechanisms & solid state diffusion (10 hrs)
Exercises: individual, in team, in informatics labs (Ashby’s selection charts) (30 hrs)
Texts, readings, handouts and other learning resources
Notes supplied by the teachers. Teachers will suggest other bibliographic references during the classes.
Assessment and grading criteria
The final evaluation consists in a written test, aimed to assess the knowledge and skills developed during the semester. This test lasts two hours and it is made of five questions (open and/or closed), sometimes including also calculus. Three questions will cover theoretical topics in science and technology of ceramic; another will concern transport phenomena and a last one will cover specific properties of this class of materials. All the proposed questions refer to topics covered during the classes and included in the lecture notes/slides made available to all students through the portal.
Workgroup activity will also take place during the semester and focussed on a specific argument agreed with the teachers. This will contribute to the final evaluation; in particular the critical approach of the students towards the proposed work will be taken into account.

Programma definitivo per l'A.A.2017/18
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