Ceramics are strong in compression and weak in shearing and tension which make them challenging to saw grind lap and polish.
Do ceramic materials have a hard trait.
Ceramics generally can withstand very high temperatures ranging from 1 000 c to 1 600 c 1 800 f to 3 000 f.
Ceramic materials are special because of their properties.
Ceramic powder consists of ceramic particles and additives that improve a powder s ease of use during component fabrication.
Ceramics may be crystalline or non crystalline and are strong stiff brittle chemically inert and do not conduct heat or electricity but properties vary widely.
Also they are generally hard and brittle with very good chemical and thermal stability.
Ceramic materials are brittle hard strong in compression and weak in shearing and tension.
The ionic and covalent bonds of ceramics are responsible for many unique properties of these materials such as high hardness high melting points low thermal expansion and good chemical resistance but also for some undesirable characteristics foremost being brittleness which leads to fractures unless the material is toughened by reinforcing agents or by other means.
Michael pfeifer in materials enabled designs 2009.
They typically possess high melting points low electrical and thermal conductivity values and high compressive strengths.