US Patent:
20170073276, Mar 16, 2017
Inventors:
- Arlington VA, US
James A. Wollmershauser - Alexandria VA, US
Kedar Manandhar - Alexandria VA, US
Francis J. Kub - Arnold MD, US
Assignee:
The Government of the United States of America, as represented by the Secretary of the Navy - Arlington VA
International Classification:
C04B 35/443
C04B 35/645
C04B 35/628
C23C 16/40
C23C 16/455
Abstract:
A method for making transparent nanocomposite ceramics and other solid bulk materials from nanoparticle powders and transparent nanocomposite ceramics and other solid bulk materials formed using that method. A nanoparticle powder is placed into a reaction chamber and is treated to produce a clean surface powder. The clean surface powder is coated with a second material by means of p-ALD to produce core/shell or core multi shell nanoparticles having a coating or coatings of a other material surrounding the nanoparticle. The core/shell nanoparticles are cleaned and formed into green compact which is sintered to produce a transparent nanocomposite ceramic or other solid bulk material consisting of nanoparticles or core/shell nanoparticles uniformly embedded in a matrix of a different material, particularly in a matrix of a different ceramic material, formed by outer shell of initial core/shell. All steps are performed without exposing the material to the ambient.