Award Data

N/A

Liquid rocket engine performance can be dramatically improved by increasing the wall temperatures for operation concurrent with a reduction in the component weight. The bipropellant fuel combustion temperatures are between 3000 "approx" 3500 C. The conventional thrusters and exit nozzles made of niobium alloys have a maximum operating temperature limit of 1600 C. A regenerative cooling technolo ...

The objective of this Phase 1 program is to perform research and development on new designs of lithium solid state batteries, specifically lithium polymer electrolyte battery (including novel methods of fabrication) with useful levels of specific power and specific energy, high reliability, very high cycle life and low cost, when compared with presently available lithium batteries. This can be ach ...

N/A

The primary goal of Phase I work is to demonstrate the feasibility of synthesizing gallium nitride (GaN) powder. Secondarily, this powder will be used to grow high-purity single crystals of GaN from a liquid GaN phase. This would be accomplished using a proprietary variation of the skull melting technique. Since GaN demonstrates peritectic-type decomposition at atmospheric pressure, the entire sku ...

In the proposed research, we will investigate a new class of long wavelength-IR (8-12 um) lasers which was first suggested by the PI in 1994. These lasers are based on cascaded type-II quantum wells. They maintain the electron recycling advantage of the recently reported quantum cascade laser, while circumvent its limitations. Not only can a population inversion be easily created with a nearly 100 ...

This proposal addresses an approach to millimeter wave imaging called encoded image detection (EID). The concept offers a means of achieving a low cost, all weather seeker for smart munition and submunitions. Its low cost potential makes adaptation of the imager also attractive for a variety of other military applications such as search and rescue, surveillance, and security. Most current devel ...

A novel quantum well infrared photo transistor, which we call QWIPT, is proposed. By taking the advantage of the almost perfect alignment of the conduction band in GaAsSb/InAlAs system, it is possible to integrate such quantum wells into a QWIPT to improve the optical gain and, therefore, the detectivity of the p-QWIP. We expect, by incorporating molecular beam epitaxy growth interruption scheme, ...

SiC has exceptionally high thermal conductivity and low linear expansion coefficient to resist thermal distortion, high elastic modulus to resist pressure and bowing distortion. It is lightweight and wear resistant. It also has excellent corrosion resistance and outstanding load bearing characteristics at elevated temperatures. Its hardness is only surpassed by diamond, CBN and boron carbide. As ...

Recent progress in self-mixing Doppler sensors have proven that measurement performance similar to that obtained with continuous-wave coherent laser radar is feasible, but with at least an order of magnitude less complexity and cost. We believe that extremely simple hardware signal processors can also be built as single chips, or at most a few chips. This points to the possibility of developing hi ...