Examples include silicon nitride, zirconia, SiSiC, silicon carbide, boron carbide, alumina, mullite, and ceramic matrix composites (CMC’s).
Description: Engineered ceramics have found increasing applications for high temperature, corrosion resistance, low wearability and a number of other applications. An example of a Class 10 specimen preparation technique is for aluminum oxynitride (AlON) which is a ceramic composed of aluminum, oxygen and nitrogen. It is a transparent ceramic that is harder than glass.
Preparation Challenge: AlON is very hard therefore specimen preparation procedures generally require a CMP (chemical mechanical polishing) component to remove induced microstructural damage. When examining the surface, it is recommended that a sputter coating be used to increase surface reflectivity.
|CLASS 10 Engineered Ceramics|
|General Ceramics||Engineered Ceramics|
|Alumina or Sapphire
|Ceramic Matrix Composites (CMC's)|
SiC fiber - Silicon Nitride matrix
|Hafnium diboride in a Boron nitride Matrix
|SiC particles - Silicon Nitride matrix
|SiC particles - Zirconium Diboride matrix|
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