Deck 13: Processing of Ceramics and Cermets

Question 1

Techniques for reducing particle size in ceramics processing involve mechanical energy in various forms.Which one of the following terms is used for these techniques:

A)comminution
B)commiseration
C)commitment
D)communion
E)communition

Answer 1

comminution

Question 2

The two general categories of techniques for reducing particle size in ceramics processing are crushing and grinding.Which of the two categories involve the reduction of larger lumps to smaller sizes for subsequent processing:

A)crushing
B)grinding

Answer 2

crushing

Question 3

The following equipment is used for crushing and grinding of minerals in the preparation of traditional ceramics raw materials.Which of the pieces listed is used for grinding (two correct answers):

A)ball mill
B)hammer mill
C)jaw crusher
D)roll crusher
E)roller mill

Answer 3

ball mill
roller mill

Question 4

Which one of the following compounds becomes a plastic and formable material when mixed with suitable proportions of water:

A)aluminum oxide
B)hydrogen oxide
C)hydrous aluminum silicate
D)silicon dioxide

Question 5

At which one of the following water contents does clay become a suitably plastic material for the traditional ceramics plastic forming processes:

A)5%
B)10%
C)20%
D)40%

Question 6

Which of the following processes are the plastic forming methods used in the shaping of traditional ceramics (three correct answers):

A)dry pressing
B)extrusion
C)jangling
D)jiggering
E)jolleying
F)slip casting
G)spinning

Question 7

The term green piece in ceramics refers to a part that has been shaped but not yet fired:

Question 8

The oven used for drying the unfired clay workpiece is called a kiln:

Question 9

Which of the following compounds are included within the category of new ceramics (three correct answers):

A)carbides
B)carbonates
C)nitrides
D)oxides
E)silicates
F)sulfates

Question 10

In the final product made of a polycrystalline new ceramic material, strength increases with grain size:

Question 11

The Bayer process is one of the available techniques to produce high purity alumina:

Question 12

Which of the following processes are associated with shaping new ceramics but not normally associated with shaping traditional ceramics (three best answers):

A)hand throwing
B)hot pressing
C)isostatic pressing
D)jiggering
E)plastic pressing
F)powder injection molding
G)slip casting

Question 13

Which of the following are the purposes of finishing operations used for parts made of the new ceramics (two best answers):

A)apply a surface coating
B)electroplate the surface
C)improve surface finish
D)increase dimensional accuracy
E)work harden the surface

Question 14

Which one of the following terms best describes what a cemented carbide is:

A)ceramic
B)cermet
C)composite
D)metal
E)new ceramic
F)traditional ceramic

Question 15

Which of the following geometric features should be avoided if possible in the design of structural components made of new ceramics (three best answers):

A)deep holes
B)rounded inside corners
C)rounded outside corners
D)sharp edges
E)thick sections
F)threads