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The main reason for the damage is the relatively weak ceramic-ceramic interface within the ceramic clusters.
The study provides simple a priori predictions of failure in prospective ceramic/substrate bilayers and ranks ceramic materials for best clinical performance.
Journal ArticleDOI
Akio Ikesue, Yan Lin Aung 
01 Dec 2008-Nature Photonics
715 Citations
Recently, scientists have shown that by eliminating the defects, a new, refined ceramic material — polycrystalline ceramic — can be produced.
The composite ceramic does not react with the commonly used electrode material silver and is a promising candidate for low-temperature cofired ceramic applications.
It was concluded that metallic films on the ceramic surfaces acted as a form of protection against wear, leaving most of the original ceramic surfaces undamaged.
The implications of the observations are the potential to control the ceramic-metal interface structure and chemistry via dopants (impurities) in the ceramic.