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Kedar Manandhar Phones & Addresses

  • Mason, OH
  • Lebanon, OH
  • Lorton, VA
  • Alexandria, VA
  • Aurora, IL
  • Chicago, IL
  • Columbia, SC
  • Laramie, WY
  • Waco, TX
  • Fort Collins, CO

Publications

Us Patents

Transparent Nanocomposite Ceramics Built From Core/Shell Nanoparticles

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US Patent:
20170073276, Mar 16, 2017
Filed:
Sep 9, 2016
Appl. No.:
15/260487
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.

Thermionic Tungsten/Scandate Cathodes And Methods Of Making The Same

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US Patent:
20160300684, Oct 13, 2016
Filed:
Apr 8, 2016
Appl. No.:
15/093853
Inventors:
- Arlington VA, US
James A. Wollmershauser - Alexandria VA, US
Kedar Manandhar - Alexandria VA, US
Assignee:
The Government of the United States of America, as represented by the Secretary of the Navy - Arlington VA
International Classification:
H01J 9/04
B22F 9/22
H01J 1/144
B22F 3/14
B22F 5/00
H01J 1/146
B22F 1/02
B22F 1/00
Abstract:
A thermionic dispenser cathode having a refractory metal matrix with scandium and barium compounds in contact with the metal matrix and methods for forming the same. The invention utilizes atomic layer deposition (ALD) to form a nanoscale, uniform, conformal distribution of a scandium compound on tungsten surfaces and further utilizes in situ high pressure consolidation/impregnation to enhance impregnation of a BaO-CaO-AlObased emissive mixture into the scandate-coated tungsten matrix or to sinter a tungsten/scandate/barium composite structure. The result is a tungsten-scandate thermionic cathode having improved emission.
Kedar Manandhar from Mason, OH, age ~56 Get Report