Ceramics Flashcards
(25 cards)
Comes from the Greek word keramikos
Ceramics
keramikos means burnt stuff
Temperature heat treatment process is called?
Firing
Are ceramics conductor or not?
Not conductor
Main compositional classes of Ceramics
Oxides, nitrides, carbides
Super cooled liquids because they do not crystallize when cooled below their MP
Glass
Principal component of white wares
Clay
Materials employed at elevated temperatures and reactive environment that do not go chemical reaction
Refractories
Used to wear, grind, or cut away other material which is relatively softer
Abrasive Ceramics
Sets and hardens when mixed with water
Cement
What are the combined elements of ceramics?
Metallic and Non-metallic elements
Cooling of liquid below BP
Sub cooling
Cooling of liquid below MP
Super cooling
Process of physical mixture of carbide and powdered metal through heating
Sintering
involves heating and compression
What is the purpose of sintering?
To reduce porosity and strengthen the material
Transformation of powders to form glasses
Vitrification
Composed of ceramics and metals
Cermets
Cermets are usually used for?
Producing saws or grinding tools
Which part on the periodic table are ceramic materials found?
Group 1A - 5A
At what percentage of fracture strain does a material become considered brittle?
Less than 5%
Characteristics of Ceramics
Melting point
High MP
Characteristics of Ceramics
Hardness
High hardness
Characteristics of Ceramics
Brittleness
High
extremely
Characteristics of Ceramics
Susceptibility to fracture
High
Property for long term application of stress
Creep Strength
