hypersonics, munitions and projectiles, directed energy
Electrification and hybridization are rapidly enabling new rotorcraft design options. Electric Vertical Takeoff and Landing (eVTOL) research efforts within the U.S. Army continue to expand.
High Power and Torque Electric Motors for Direct-Drive Rotorcraft Applications Read More »
Since 2019 there have been demonstrations of ferroelectric III-Nitride semiconductors with potential to impact future electronic and photonic applications due to their extraordinary properties. However, the only epitaxial growth process that produces single crystal thin films has been molecular beam epitaxy [1-3] and these films have already shown tremendous potential.
The alloys primarily focused upon so far are centered around incorporating scandium (Sc) in the AlGaN system. The opportunity for other group IIIb based alloys such as Yttrium has also been shown and may have merit to improve certain properties of the ferroelectrics [4,5]. Although the Army has started a MURI program based upon this subject, the use of MOCVD is complementary to that effort and requires novel precursors to grow the thin films [6,7]. Such MOCVD thin films would constitute the most easily manufacturable solution for larger wafer scale processes [6,7].
Thus, the aim is to develop them in parallel to some basic research for easy technology transition. Four inch or larger wafers are quite common to MOCVD reactors but are not possible in research grade MBE systems. The material science innovative research and development from this topic can enable useful product development at manufacturing for ferroelectric III-Nitride devices. Examples of this include high operating temperature electronic memory, high temperature electronic circuits, and integrated nonlinear optical photonic circuits for UV-visible wavelengths.
Electronic quality ferroelectric III-Nitride epitaxy for device heterostructures Read More »
Businesses must develop multi-physics, component-based reduced-order models and associated interfaces to accelerate high-fidelity design tools for predicting detailed, time-accurate hypersonic vehicle flow-fields.
Multicomponent Reduced Order Modeling of Hypersonic Boundary Layers Read More »
Businesses must incorporate new mathematical constructs and high-fidelity design tools to predict fluid-structure interactions of Army vehicle (tanks and rotorcraft).
Modeling Tools for Army Vehicle (Tanks and Rotorcraft) Mobility Applications Read More »
Businesses must design, develop and demonstrate a high-throughput mechanical test platform capable of replicating extreme thermal-mechanical-chemical environments.
High-Throughput, High-Temperature Mechanical Test Platform Read More »
The Army’s Long Range Precision Fires mission expands the current portfolio of conventional artillery to advanced munition technologies with extended range capability (>70km). Extended range requires the projectile to fly to higher velocities and altitudes as well as longer flight times.
Thermal Protection Coating for Artillery Projectiles Read More »
The U.S. Army must develop highly maneuverable hypersonic weapons that can survive high-G shock loads and harsh aerothermodynamic environments in a GPS-denied environment. To enable these requirements new materials and new manufacturing methods must be developed. There has been increasing desire to develop vehicles and projectiles that travel at the speed of sound and beyond.
Joining of Dissimilar Materials for Hypersonic Applications Read More »
The United States Army has a need to develop high-fidelity, computationally efficient solvers for the aerodynamic analysis and design of vehicles ranging from rotary-wing aircrafts to medium/long-range hypersonic projectiles. The CREATETM -AV Kestrel team has been developing a comprehensive suite of codes with a combined on-body/off-body computational approach for the prediction of flows around such vehicles for over a decade.
Modeling Tools for Hypersonic Flight Read More »
Laser systems in the infrared have a long history of development for both DoD and commercial applications. Blue laser diode systems have been developed with improved performance over the past 2 decades; however, their brightness and power levels are much less than the best infrared systems.
Bright Blue Semiconductor Laser Arrays for Military Applications Read More »
Carbon-carbon composites (CCCs) have been utilized for hypersonics applications for decades. For much of that time, the state of the art in source materials, particularly for the matrix phase, has advanced slowly or not at all. Recently, however, a spate of new potential materials (particularly polymer resins) has been developed and are being evaluated as possible precursors for CCCs.
Development of pyrolysis optimization methodology for carbon/carbon materials Read More »
