Award Data

The objective of this proposal is to develop advanced radiation transport modeling techniques that accurately and efficiently treat transport in media having widely varying optical properties; in particular, hot gases and plasmas with optical depths ranging from the optically thin to the optically thick regimes. In doing this, we will develop a hybrid diffusion-Monte Carlo (HDMC) model that effic ...

In this STTR project, an efficient and high-fidelity computational module to predict non-gray radiative transfer will be developed and validated. The proposed hybrid approach to solve the radiative transport equation (RTE) is a combination of the spherical harmonics (PN) method and the Monte-Carlo method. Non-gray gases will be treated using the full spectrum correlated k-distribution (FSCK) metho ...

There is an increasing demand for high temperature sensors that operate accurately and reliably in extreme environments and they are vital in several aerospace applications. This aim was directly addressed by a novel idea where microstructural changes caused by phase transformation and the attendant physical property changes that can be easily measured is used as a sensor. In Phase I of this progr ...

The primary objective of this Phase-II research effort will be to build, deliver, and test a next-generation time-domain ballistic photon imaging (BPI) system based on ultrafast lasers for characterizing the two-phase combustion region within bi-propellant rocket engines. This will include integration into a rocket facility of choice for the Air Force Office of Scientific Research and the Air For ...

CompuTherm, LLC in collaboration with Oak Ridge National Laboratory proposes to develop a modeling tool that can be used to understand the effect of Ti, Zr, and Hf addition on the improvement of ductility of the (Mo) phase in the Mo-Si-B system. The tool will be developed by integrating thermodynamic modeling with mechanical testing. Thermodynamic descriptions of the Mo-Si-B-X (X=Ti, Zr, Hf) syste ...

Friction Stir Processing (FSP) has been demonstrated to generate refined microstructures, resulting in improved material properties. This has several areas of application. First, FSP can enhance the formability of the particular alloy of interest. This is especially important for the superplastic forming process, where the use of FSP can be used to create superplastic behavior at high strain r ...

Field-emission electron-emitting arrays hold promise for use in high current-density electron-beam devices as replacement for power consuming thermionic emitters. Large field-emitter arrays, however, are limited in total current due to non-uniformity and resulting instability problems. As a solution to these problems current-limiting devices, such as a field-effect transistor (FET) for each emitte ...

All the promising Mo-Si-B-X alloys developed so far contain a mixture of Mo-solid solution and brittle intermetallic phases. For further advances to occur, a full understanding and control of the properties of the Mo-rich solid solution is critical. The poor low temperature ductility of the solid solution phase and the catastrophic intermediate temperature oxidation resistance continue to be key ...

The objective of this proposal is to develop and validate a methodology for obtaining accurate, reliable and transferable force fields for a variety of ionic liquids (ILs) including those designed for lubrication, gas generation, energy storage and as energetic materials. The methodology involves development of a hierarchy of force fields through reduction of degrees of freedom in a statistical me ...

This STTR Phase I project is designed to develop a novel process for fabricating a nano-grained ceramic material for infrared windows. The proposed STTR builds upon our previous Phase I (Navy) SBIR experience to minimize risks and maximize the likelihood of success. This proposed work will utilize an innovative method to fabricate nanocrystalline alumina infrared window materials with significantl ...