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Acoustic Liners with Innovative Core Geometries for Enhanced Low-Frequency Noise Mitigation

BACKGROUND Low-frequency (<~400 Hz) airborne noise has several detrimental effects ranging from exciting structural vibration modes (with potentially catastrophic results), reducing passenger comfort and payload integrity on commercial flights, restricting military mission capabilities, to contributing to noise pollution. Low-frequency noise is...

Published: 7/31/2023 | Inventor(s): Andrew Chambers, James Manimala

Keywords(s): Defense, Engineering, Engineering: Mechanical & Aerospace, Material Science & Engineering, Transportation, Unmanned Systems

Category(s): Technology Classifications > Unmanned Systems, Technology Classifications > Engineering > Mechanical & Aerospace Engr, Technology Classifications > Defense, Technology Classifications > Engineering > Civil Engr, Technology Classifications > Construction

Coating, Layer, and Bulk Material for Extreme Thermal Protection

BACKGROUND High-temperature applications, such as rocket engine combustion output, can reach temperatures as high as 3,315 °C (6,000 °F). Enough heat to fuse a concrete surface, like a launch pad, into glass. Fused concrete has a limited lifetime as structural integrity is compromised in some cases immediately, resulting in potentially dangerous...

Published: 8/28/2023 | Inventor(s): Matthew (Tyler) Ley, Ali Jarekji, Aedan Cottle, Christian Branch, Andrew Abernathie

Keywords(s): Construction, Defense, Engineering, Engineering: Mechanical & Aerospace, Material Science & Engineering, Transportation, Unmanned Systems

Category(s): Technology Classifications > Material Science & Engr, Technology Classifications > Engineering > Civil Engr, Technology Classifications > Construction, Technology Classifications > Unmanned Systems, Technology Classifications > Engineering > Mechanical & Aerospace Engr, Technology Classifications > Defense

Photobiodegradable Plastics via PPDvSOP improvement

BACKGROUND At first plastics were welcome as blessings. Specifically, their durability, high strength per weight and low cost have made them the ideal packaging materials. However, the last seven decades have proved, those same attributes combined with improper waste management, led to a plastic pollution problem. An estimated 6300 million metric tons...

Published: 7/19/2023 | Inventor(s): Ali Kalkan, Linqi Zhang, Nishan Khatri

Keywords(s): Chemistry, Energy & Environment, Material Science & Engineering

Category(s): Technology Classifications > Engineering, Technology Classifications > Environment & Energy, Technology Classifications > Material Science & Engr

Development of Well-Defined Artificial Eumelanin

BACKGROUND Melanin is a naturally occurring pigment found in many organisms. Eumelanin is the black-brown variety of melanin which is responsible for dark colored eyes, hair, and skin. It acts as a natural photoprotector from the harmful radiation from the sun. Eumelanin is resistant to damage caused by high temperature, chemical stresses, reactive...

Published: 10/19/2022 | Inventor(s): Toby Nelson

Keywords(s): Material Science & Engineering

Category(s): Technology Classifications > Biotech & Pharmaceutical, Technology Classifications > Chemistry, Technology Classifications > Material Science & Engr

Moldable Wood

BACKGROUND Advances in wood-plastic-composites (WPC) have permitted the utilization of wood in additional applications such as automotive components, household electronics, and environmentally resistant building products. By combining the mechanical strength of wood with the durability and resistance of plastics, WPC has several distinct characteristics...

Published: 10/19/2022 | Inventor(s): Sriharsha Karumuri, Selim Hiziroglu, Ali Kalkan

Keywords(s): Material Science & Engineering

Category(s): Technology Classifications > Material Science & Engr

Process for Making Silicon-based Anode for Li-Ion Battery

Abstract Conventional Li-ion batteries use graphite anodes, which have a theoretical specific capacity of 372 mAh/g, which limits their application for high capacity energy storage devices. Silicon has been tried because of its high theoretical specific capacity (on the order of 4200 mAh/g) but the stress created due to volume expansion during intercalation...

Published: 10/19/2022 | Inventor(s): Malay Jana, Raj Singh

Keywords(s): Material Science & Engineering

Category(s): Technology Classifications > Environment & Energy, Technology Classifications > Material Science & Engr

Additive Manufacturing Using Ionized Particles

BACKGROUND Modern 3D printers can print intricate shapes at fine detail, but their low print speed enables them to only be used for prototyping or, at best, limited batch manufacturing. As an example, the fasted current metal printers can print a volume of about 60 cm³/hr. per nozzle or laser. This equivalent to about 8 grams/minute for a...

Published: 4/24/2023 | Inventor(s): Aaron Alexander

Keywords(s): Material Science & Engineering

Category(s): Technology Classifications > Engineering, Technology Classifications > Material Science & Engr, Technology Classifications > Advanced Manufacturing

Nanodiamond Process Technology Development for Thermal Management of Power Electronics

Abstract This invention is a novel nanocrystalline diamond (NCD) seeding and process technology which enables the direct extraction of heat from power devices such as GaN, SiC which operate at high current densities requiring rapid heat dissipation. The method comprises seeding NCD of about 6 nm diameter. Once seeded, the layer is grown to between...

Published: 7/19/2023 | Inventor(s): Raj Singh, Nirmal Govindaraju

Keywords(s): Material Science & Engineering

Category(s): Technology Classifications > Material Science & Engr