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What is ceramics ?

The word ceramics, derives its name from the Greek keramoskeramos,

meaning “pottery”, which in turn is derived from an older Sanskrit

Root, meaning “to burn”. The Greeks used the term to mean

“burned earth”. Thus the word was used to refer to a productobtained through the action of fire upon earthy materials.

ost people, when they hear the word ceramic, think of 

art, dinnerware, pottery, tiles, brick and toilets. The above

mentioned products are referred to as traditional ceramics.

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Classifcation o Ceramics

Glasses Clay

products

Refractories Abrasives Cements Advanced

ceramics

-optical

-composite

reinforce

-containers/

household

-whiteware

-structural

-bricks for

high T

(furnaces)

-sandpaper

-cutting

-polishing

-composites

-structural

-engine

rotors

valves

bearings-sensors

 "dapted from #ig. $%.$ and discussion in

Section $%.!&', Callister & Rethwisch 8e.

(eramic aterials

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Ceramics Application:Cutting Tools

) Tools*  && for grinding glass, tungsten,

  carbide, ceramics

  && for cutting Si wafers

  && for oil drilling

bladesoil drill bits

Single crystal

diamonds

polycrystalline

diamonds in a resin

matri+.

hotos courtesy artin -eakins,

G Superabrasives, /orthington,

01. 2sed with permission.

) aterials*&& manufactured single crystal

  or polycrystalline diamonds

  in a metal or resin matri+.

  && polycrystalline diamonds  resharpen by microfracturing

  along cleavage planes.

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Advanced Ceramics

•Advanced ceramic materialshave been developed

over the past half century

•Applied as thermal barrier coatings to protect metal

structures, wearing surfaces, or as integralcomponents by themselves.

•Heat resistance and other desirable properties have

lead to the development of methods to toughen the

material by reinforcement with fibers and whiskers

opening up more applications for ceramics