Kedar Manandhar

Title: Kedar Manandhar: Innovator in Thermionic Cathodes and Nanocomposite Ceramics

Introduction

Kedar Manandhar is a notable inventor based in Alexandria, VA, who has made significant contributions to the fields of thermionic cathodes and nanocomposite ceramics. With a total of three patents to his name, he has demonstrated a commitment to advancing technology through innovative solutions.

Latest Patents

One of Kedar's latest patents is focused on thermionic tungsten/scandate cathodes and the method of making them. This invention involves a thermionic dispenser cathode that features a refractory metal matrix with scandium and barium compounds. The method utilizes atomic layer deposition (ALD) to create a uniform distribution of a scandium compound on tungsten surfaces. Additionally, it employs in situ high-pressure consolidation to enhance the impregnation of a BaO—CaO—AlO-based emissive mixture into the scandate-coated tungsten matrix. The result is a tungsten-scandate thermionic cathode that exhibits improved emission characteristics.

Another significant patent involves the creation of transparent nanocomposite ceramics built from core/shell nanoparticles. This method allows for the production of transparent nanocomposite ceramics and other solid bulk materials from nanoparticle powders. The process includes treating a nanoparticle powder to produce a clean surface, followed by coating it with a second material using p-ALD. The resulting core/shell nanoparticles are then formed into a green compact and sintered to create a transparent nanocomposite ceramic, ensuring that all steps are performed without exposure to ambient conditions.

Career Highlights

Kedar Manandhar is currently associated with the United States Navy, where he contributes his expertise in innovative technologies. His work has been instrumental in developing advanced materials that have potential applications in various fields.

Collaborations

Kedar has collaborated with notable colleagues such as Boris N. Feigelson and James A. Wollmershauser, further enhancing the impact of his research and inventions.

Conclusion

Kedar Manandhar's contributions to the fields of thermionic cathodes and nanocomposite ceramics highlight his innovative spirit and dedication to advancing technology. His patents reflect a deep understanding of material science and engineering, paving the way for future advancements in these areas.