Lecture. Intro to Course

8/4/2019 Lecture. Intro to Course

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ENGINEERING

CERAMICS AND

GLASSES[MET- 407]

Engr. Tanveer Ahmad


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Course Outline

History and classification of ceramic materials

traditional Ceramics, Glass-ceramics, Electro-ceramics,

Ceramics Microstructure, Review of Bondingand Structural Principles, Raw Materials

Powder Processing, Forming, Densification,

Physical, Thermal, electrical and MechanicalBehaviour of ceramics,


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Introduction to Binary Phase Equilibria,Microstructure Development and Properties,Refractories and their applications.

Special ceramics, electro ceramics.

Types of Glasses, Glass transition,viscoelestic behaviour, glass transition and

second order transformation, heat treatment of glasses, glass formability,

glass production techniques


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Reference Books

M.W.Barsoum, Fundamentals of Ceramics BARRY Carter, Ceramic materials; Sc and

tech.

Rice, R.W., Ceramic Fabrication

Technology

Bengisu, M., Engineering Ceramics

Richerson, D.W., Modern Ceramic

Engineering

Terpstra, R. A.Ceramic Processing


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Lee, W.E. Ceramic Microstructures:

Property Control by Processing

Rawson H Glasses and theirApplications


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Aim of the Course

What is a ceramic material?

What kind of properties?

What kind of applications?

How do we make ceramic materials?

How do we design with ceramics?

Build up own database of properties.

To examine chemical/physical properties of ceramics

To introduce the uses of ceramics To explore concepts and mechanisms of its processing


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Intro Ceramics comes from Greek word keramos, which meanspotters clay.

Ceramics are diverse group of nonmetallic, inorganic solid compoundswith a wide variety of compositions and properties.

Ceramics are crystalline compounds made up of metallic andnonmetallic compounds with properties that differ from the constituents.

Ceramics in the form of pottery are among the oldest productsmanufactured by humans.

Clay is inexpensive material and is found throughout the world. Early clay products were sun dried not fired.

Firing as used in pottery dates back to around 2000 to 3000 B.C.


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What They Are?

A compound of metallic and nonmetallic elements,for which the inter atomic

bonding is predominantly ionic.

They tend to be oxides, carbides, etc of metallicelements.

The mechanical properties are usually good: highstrength, especially at elevated temperature.

However, they exhibit low to nil-ductility, and havelow fracture toughness.


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Taxonomy of Ceramics

Glasses Clayproducts

Refractories Abrasives Cements Advancedceramics

-optical

-compositereinforce

-containers/household

-whiteware

-bricks-bricks for

high T

(furnaces)-sandpaper

-cutting-polishing

-composites

-structuralengine

-rotors-valves-bearings

-sensorsAdapted from Fig. 13.1 and discussion inSection 13.2-6, Callister 7e.


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Ceramic Products

Clay construction products- bricks, clay pipe, andbuilding tile

Refractory ceramics- ceramics capable of hightemperature applications such as furnace walls,crucibles, and molds

Cementused in concrete- used for construction and

roads Whiteware products -pottery, stoneware, fine china,

porcelain, and other tableware, based on mixtures ofclay and other minerals


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Glass- bottles, glasses, lenses, window pane, andlight bulbs

Glass fibers - thermal insulating wool, reinforcedplastics (fiberglass), and fiber optics communicationslines

Abrasives- aluminum oxide and silicon carbide

Cutting tool materials- tungsten carbide, aluminumoxide, and cubic boron nitride


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Ceramic insulators- applications include electricaltransmission components, spark plugs, andmicroelectronic chip substrates

Magnetic ceramics example: computer memories

Nuclear fuelsbased on uranium oxide (UO2)

Bioceramics- artificial teeth and bones


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General Classification of

Ceramics There are various classification systems

of ceramic materials, which may be

attributed to one of two principalcategories:

application base system

And

composition base system

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Application basedClassification


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Composition based


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Lecture. Intro to Course

Documents

Transcript of Lecture. Intro to Course