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Currently, thermal spray (flame and plasma spray) is the only single step method of applying most metal and non-oxide ceramic coatings to large objects. These coatings are usually of a low quality, and thin films cannot be applied. An in situ deposition technique that inexpensively and easily applies nitrides, carbides and other non-oxide thin or thick films in an environmentally friendly manner i ...

Nicalon fiber-reinforced SiC matrix composites owe their good mechanical properties at room temperature to either C or BN interfaces, which provide a weak interfacial bond. However, C and BN interfaces encounter oxidation problems at elevated temperatures in oxidizing environments resulting in degradation of mechanical properties. Recent efforts to replace C and BN interfaces have identified alu ...

Currently vacuum based methods of PVD and CVD are the only processes for forming GaN thin films and coatings. These methods are usually expensive and are not applied in a production friendly manner. An atmospheric deposition technique that inexpensively and easily applies GaN thin or thick films in an environmentally friendly manner is a priority for any number of DOD and commercial applications. ...

Multi-component dielectric thin films suitable for solid state electronics have been deposited using various conventional chemical vapor deposition (CVD) techniques, including organometallic CVD, plasma enhanced CVD, and low pressure CVD. However, these approaches are difficult to integrate with standard silicon IC processing of ferroelectric DRAM and NVFRAM attributed to high deposition temperat ...

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 ...

The proposed work is intended to lead to the development of a revolutionary class of photon detectors capable of operating at ambient temperatures with fast response times. Specific benefits of the proposed detector include: i) Low cost versions can readily be reduced-to-practice due to inherent simplicity of the sensing element compared to existing photon or thermal detectors, ii) there is no nee ...

We propose here a ferroelectric trigger for a UWB source with high voltages and operated at high rep rate. This trigger will be simpler and more reliable than existing designs, and will be implemented at lower cost. In addition, this trigger will allow operation at much higher rep rates than existing designs. Finally, the proposed switch will have a lower jitter than competing designs. During Pha ...

The proposed effort focuses on the need for innovative, space realizable, self-contained solid state flexure mechanism for vibration attenuation/isolation. The proposed mechanism is a sealed linear actuator capable of high bandwidth (0-1 kHz) control. A design feasibility study will be performed on the use of piezoelectrics in an innovative flexure mechanism to provide robust vibration attenuation ...

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