Lecture

Ceramics: Powder Sintering

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In course

MSE-214: Materials engineering I

An introduction to the processing-microstructure-property relationships of polymers and metals. The objectives of the course are to understand a) basic behaviors of polymers and metals and b) how to select materials for components relevant in microtechnolo ...

Description

This lecture covers the drying and debinding processes in ceramic manufacturing, emphasizing the importance of proper conditioning before sintering. It delves into the mechanisms causing cracking during drying, the objectives of debinding, and the different forming methods used. The sintering process is thoroughly explained, focusing on the heat treatment leading to strong bonds between ceramic particles without complete melting. The lecture also explores the driving forces and mechanisms behind sintering, as well as the mass transport mechanisms and grain growth during the process. Additionally, it discusses the influence of temperature on diffusion mechanisms and the impact of particle size on sintering rate. The session concludes with insights into the stages of sintering and the role of doping in altering microstructural development.

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Instructors (3)

Pierre-Etienne Bourban

Background 1990 Ingénieur en science des matériaux 1993 PhD in materials science Activities 1993-1994 Research at the Center for Composite Materials, University of Delaware, USA (ccm.udel.edu), SNSF grant Since 1994 Research and teaching at EPFL, Composites, (LTC, LPAC) 1995-1999 Coordination Swiss Priority Program on Materials research: 2.2: Composites Since 1998 Biocomposites 2004-2009 Direction of the EPFL Transdisciplinary programme in Sport and Rehabilitation 2005-2008 Member of the EPFL Vice-Presidency for Innovation and Valorisation and direction a.i.EPFL-LTC Since 2016 Direction Discovery Learning Labs Materials/Bioengineering and Engineering

Harm-Anton Klok

Expertise Polymer design at nanoscaleBiologically-inspired polymers Mission Research at the Laboratory of Polymer (LP) focuses on the development of novel advanced polymeric materials with potential applications in optics, electronics or medicine. The philosophy is that precise control over nanoscale structure is an important prerequisite to tailor polymer properties. To this end, a “bottom-up” approach is followed, which starts with designing a new material at the molecular level, in order to be able to pr

Michael Stuer

Mission Study effects of dopants and structural defects on the microstructure development and the optical properties of transparent ceramics. Teaching & PhD PhD Students Katerina Urbancová, Annalena Erlacher Courses Advanced ceramic technologies MSE-495 Advanced ceramic processing concepts and technologies will be presented. Students will learn concepts on advanced technologically-relevant ceramic materials for a wide range of applications from MedTech, energy conversion & storage, with in

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Related concepts (28)

Abnormal grain growth

Abnormal or discontinuous grain growth, also referred to as exaggerated or secondary recrystallisation grain growth, is a grain growth phenomenon through which certain energetically favorable grains (crystallites) grow rapidly in a matrix of finer grains resulting in a bimodal grain size distribution. In ceramic materials this phenomenon can result in the formation of elongated prismatic, acicular (needle-like) grains in a densified matrix with implications for improved fracture toughness through the impedance of crack propagation.

Ceramic

A ceramic is any of the various hard, brittle, heat-resistant, and corrosion-resistant materials made by shaping and then firing an inorganic, nonmetallic material, such as clay, at a high temperature. Common examples are earthenware, porcelain, and brick. The earliest ceramics made by humans were pottery objects (pots, vessels, or vases) or figurines made from clay, either by itself or mixed with other materials like silica, hardened and sintered in fire.

Particle

In the physical sciences, a particle (or corpuscule in older texts) is a small localized object which can be described by several physical or chemical properties, such as volume, density, or mass. They vary greatly in size or quantity, from subatomic particles like the electron, to microscopic particles like atoms and molecules, to macroscopic particles like powders and other granular materials. Particles can also be used to create scientific models of even larger objects depending on their density, such as humans moving in a crowd or celestial bodies in motion.

Point particle

A point particle (ideal particle or point-like particle, often spelled pointlike particle) is an idealization of particles heavily used in physics. Its defining feature is that it lacks spatial extension; being dimensionless, it does not take up space. A point particle is an appropriate representation of any object whenever its size, shape, and structure are irrelevant in a given context. For example, from far enough away, any finite-size object will look and behave as a point-like object.

Particle detector

In experimental and applied particle physics, nuclear physics, and nuclear engineering, a particle detector, also known as a radiation detector, is a device used to detect, track, and/or identify ionizing particles, such as those produced by nuclear decay, cosmic radiation, or reactions in a particle accelerator. Detectors can measure the particle energy and other attributes such as momentum, spin, charge, particle type, in addition to merely registering the presence of the particle.

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