United States of America as Represented by the Secretary of the Air Force

United States of America as Represented by the Administrator of Nasa

Case Western Reserve University

Ali Sayir

Brad Winston Hoff

Wilkin Wai-Hang Tang

Sterling Ryan Beeson

Frederick W Dynys

Alp Sehirlioglu

Fred Dynys

Systems, methods and apparatus related to a method for constructing a field emission device. The method includes providing a metal cathode substrate; shaping a carbon fiber fabric into a pattern, creating a patterned carbon fiber fabric; and brazing at least a portion of the patterned carbon fiber fabric to the metal cathode substrate.

Systems, methods and apparatus for fabricating and utilizing a cathode

Systems, methods, and other embodiments associated with multi-phase ceramic composites are described herein. Specifically, a multi-phase ceramic composite having a microstructure having at least one solid-state lubricant phase and at least one wear resistant material phase.

Multi-phase ceramic system

Piezoelectric ceramics that can be used in high temperature actuators. The piezoelectric ceramics have various desirable properties, for example the materials do not depole up to about 400&#xb0; C. and have large piezoelectric coefficients &#x3e;400 pm/V. In addition the thickness mode electromechanical coupling coefficient is large, increasing from 0.5 to 0.65 with temperature. The planar electromechanical coefficient is around 0.40 and does not show a significant dependence on temperature. These materials are highly polarizable with remnant polarization around 50 &#x3bc;C/cmand are electrically hard with coercive field above 20 kV/cm. They exhibit single crystal like ferroelectric behavior with square hysteresis loops. Such properties make these materials a piezoelectric ceramic that can be used in stack actuators at high temperatures. Methods for preparing the piezoelectric ceramics are also disclosed.

High temperature piezoelectric ceramics

Growing community of inventors

Bay Village, OH, United States of America

Ali Sayir