ceramic presentation

8/9/2019 Ceramic Presentation

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CERAMIC

Classify as:

Inorganic andnonmetallic material

have a crystalline orpartly crystallinestructure, or may

be amorphous(eg,a lass!

prepared by the actionofheatand subse"uent

coolin

ne# ceramicmaterial#ere developedfor use in

advancedceramicenineerin$ for

e%ample,insemiconductors

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'here are many methods of forming ceramics, mainlydepending on the +nal desired shape of a product

Step !: 'he pattern is designed #ith the materials already mentioned (plastic,

#ood, metal, etc! Many materials can be used as a pattern, because most of

them support the lo# temperature #hich is used in the Ceramic Moulding

rocess

Step ,: 'he mi% is in-ected into a binder

Step -: art of some refractory ceramic po#der is ta.en out, according to #hat

is needed

Step .: 'o the binder, there is added a special gelling, in order to be mi%ed

Step /: 'he slurry is put into the pattern

Step 0: 'he slurry is heated to a high temperature, depending on #hat is

re"uired

Step 1: 'he slurry is allo#ed to cool and the process is done

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rocess of material consolidation caused byheating

'he temperature of sintering is bet#een /01 2 304

of melting point of the predominant component

in the ceramic material

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5lip casting is the process #here the slip ispoured into a plaster (gypsum! mould and the#ater is dra#n into the plaster, creating a #all ofconsolidated material 'his can continue until

the part is solid, or can be interrupted to ma.e athin #alled part

Slip (astin

plaster mould flled withslurry


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Slip (astinconsolidation o green body by thewalls o plaster mouldc) pouring out excess o slurryin order to obtain thin-walledproduct, c1-2) (thin-walled) product

drying (note that there is signifcantshrinkage o the product in thedrying process)

solid casting


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'ape (astin'his process involves the casting of a slurry onto a6at moving carrier surface'he slurry passes beneath the .nife7s edge(commonly called doctor7s blade!, #hich controls thethic.ness of a tape'he solvents evaporate to leave a relatively dense6e%ible tape that may be stored on rolls or strippedfrom the carrier in a continuous process


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ADVANTAGES DISADVANTAGE

Close tolerance ExpensiveSmooth finish Not reusable

Intricate Detail

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roducing precision part li.e dies for

dra#ing

Casting and e%trusion

ump impellers

Components of nuclear reactors

Air craft

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ceramic presentation

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