公开(公告)号：US10807109B2

公开(公告)日：2020-10-20

申请号：US15846257

申请日：2017-12-19

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： David R. Baker ,  Joshua P. McClure ,  Kyle N. Grew

IPC: C23C16/48 ,  C23C14/00 ,  B05D1/38 ,  B05B5/08 ,  G01N21/65 ,  H01L27/144 ,  G03F7/00

Abstract: Plasmonically enhanced electric fields are used to deposit particles at selected locations through decomposition or electron transfer reactions with precursor molecules in gas or liquid phase. The location of the enhanced electric fields is controlled through a combination of plasmonic substrate structure shape, material, incident light wavelength and polarization. The particles are deposited at designated locations only, whereby no deposition occurs at locations lacking enhanced electric fields. Many reaction variables can be used to change the rate of particle deposition such as precursor molecules, exposure time, precursor concentration, and temperature making for a highly customizable reaction space.

公开(公告)号：US10766071B2

公开(公告)日：2020-09-08

申请号：US15896804

申请日：2018-02-14

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Laszlo J. Kecskes ,  Kristopher A. Darling ,  Rajiv S. Mishra ,  Yuri Mishin ,  Kiran N. Solanki ,  Mansa Rajagopalan

IPC: B22F9/00 ,  B22F9/12 ,  B22F9/14 ,  C22C9/00 ,  B22F9/04 ,  B22F1/00 ,  C22C1/04 ,  B82Y40/00 ,  B22F3/20 ,  B82Y30/00

Abstract: Novel metallic systems and methods for their fabrication provide an extreme creep-resistant nano-crystalline metallic material. The material comprises a matrix formed of a solvent metal with crystalline grains having diameters of no more than about 500 nm, and a plurality of dispersed metallic particles formed on the basis of a solute metal in the solvent metal matrix and having diameters of no more than about 200 nm. The particle density along the grain boundary of the matrix is as high as about 2 nm2 of grain boundary area per particle so as to substantially block grain boundary motion and rotation and limit creep at temperatures above 35% of the melting point of the material.

公开(公告)号：US20200274178A1

公开(公告)日：2020-08-27

申请号：US16281137

申请日：2019-02-21

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Rongzhong Jiang ,  Dat Tien Tran ,  Deryn D. Chu

IPC: H01M8/0656 ,  H01M8/1011

Abstract: Methods and apparatus for generating electric power from a fuel cell are disclosed. In embodiments, a fuel cell for generating electric power includes: a first electrochemical cell including a first electrode and second electrode, wherein the first electrochemical cell is configured to generate a first stage electric power (P1) from a fuel source; and a bi-cell including a second electrochemical cell and third electrochemical cell, wherein the second electrochemical cell includes a third electrode in fluid communication with the fuel source, and a fourth electrode, wherein the second electrochemical cell is configured to generate hydrogen gas from the fuel source and transport the hydrogen gas to a third electrochemical cell, and wherein the third electrochemical cell includes the fourth electrode, and a fifth electrode in fluid communication with a second air source, wherein the fourth electrode is configured for use by the second electrochemical cell as a cathode for hydrogen generation, and by the third electrochemical cell as an anode for hydrogen oxidation, and wherein the third electrochemical cell is configured to generate a second stage electric power (P2).

公开(公告)号：US20200024702A1

公开(公告)日：2020-01-23

申请号：US16587724

申请日：2019-09-30

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： John J. Pittari, III ,  Steven M. Kilczewski ,  Jeffrey J. Swab ,  Kristopher A. Darling ,  Billy C. Hornbuckle ,  Heather A. Murdoch ,  Robert J. Dowding

IPC: C22C29/08 ,  C22C1/05

Abstract: A sintered cemented carbide body including tungsten carbide, and a substantially cobalt-free binder including an iron-based alloy sintered with the tungsten carbide. The iron-based alloy is approximately 2-25% of the overall weight percentage of the sintered tungsten carbide and iron-based alloy. The tungsten carbide may be approximately 90 wt % and the iron-based alloy may be approximately 10 wt % of the overall weight percentage of the sintered tungsten carbide and iron-based alloy. The tungsten carbide may comprise a substantially same size before and after undergoing sintering. The iron-based alloy may be sintered with the tungsten carbide using a uniaxial hot pressing process, a spark plasma sintering process, or a pressureless sintering process. The sintered tungsten carbide and iron-based alloy has a hardness value of at least 15 GPa and a fracture toughness value of at least 11 MPa√m.

公开(公告)号：US10401393B2

公开(公告)日：2019-09-03

申请号：US15635664

申请日：2017-06-28

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： George A. Levin ,  Paul N. Barnes ,  Charles C. Rong

IPC: G01R15/20 ,  G01R19/00 ,  G01R33/12

Abstract: A method of measuring superconducting critical current in persistent mode using superconducting closed loops which allow the persistent current to flow without any joints. This persistent critical current is different than traditional resistive critical current that is the upper limit of the superconducting current carrying capacity, and provides the information about the range of critical current in persistent mode that is more close to applications in MRI, SMES, and Maglev operations. The measurement can be used as a quality control method in the manufacturing process and a piece of crucial information to magnet manufacturers for the design and fabrication of magnet. The superconducting materials include the second generation superconducting wires (coated conductors) based on Rare Earth (RE) Barium Copper Oxide superconducting material (REBa2Cu3O6+x, REBCO), or any other type of superconducting wires that can be manufactured in the form of tape.

公开(公告)号：US10369248B2

公开(公告)日：2019-08-06

申请号：US14445089

申请日：2014-07-29

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Randy A. Mrozek ,  Joseph L. Lenhart ,  Michael C. Berg ,  Eric J. Robinette

IPC: C08J9/26 ,  C08J9/28 ,  A61L24/00

Abstract: Porous polymer composites and methods of preparing porous polymer composites are provided herein. In some embodiments, a method for preparing porous polymer composites may include mixing a first polymer with a solvent and a particulate filler to form a first polymer composition, wherein the amount of particulate filler in the first polymer composition is below a mechanical percolation threshold; and removing the solvent from the first polymer composition to concentrate the first polymer and particulate filler into a second polymer composition having a porous structure, wherein the particulate filler concentration in the second polymer composition is increased above the mechanical percolation threshold during solvent removal.

公开(公告)号：US20190186884A1

公开(公告)日：2019-06-20

申请号：US15846244

申请日：2017-12-19

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Gregory S. Mannix

IPC: F42B39/24 ,  F41H5/02 ,  F41H5/04

CPC classification number: F42B39/24 ,  F41H5/023 ,  F41H5/0485

Abstract: An ammunition storage compartment includes a plurality of connected walls defining an interior region to store ammunition, wherein at least one of the walls includes an outer armor plate having an outer surface and an inner surface. A layer of energy absorbing material is located proximate the inner surface of the armor plate in the interior region. A spall mitigating panel is located inward of the layer of energy absorbing material in the interior region. At least one air gap is in between the layer of energy absorbing material and the spall mitigating panel.

公开(公告)号：US20190186690A1

公开(公告)日：2019-06-20

申请号：US15846347

申请日：2017-12-19

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Stephen P. Berkebile ,  Kevin C. Radil

IPC: F16N29/04 ,  F16H57/04 ,  G07C5/08

Abstract: Detecting the occurrence of loss of effective lubrication in high-speed machinery components is provided. The imminent catastrophic failure may be predicted when torque or power transfer is lost. An estimate of when failure will likely occur throughout the operation of the machinery may be determined as well as the damage state after the liquid lubrication supply has ended or becomes inadequate to lubricate the machinery components effectively. By monitoring the concentration of gas species and the rate of change in concentration of the gas in the gearbox or machinery enclosure after the supply of the primary lubricant ends, determinations may be made about the time to failure and the damage state. The determinations may be based on thermomechanical and chemical processes, on measurement of a baseline system, or by setting a threshold of expected change in gas concentration. These determinations may be transmitted for further decision making and response.

公开(公告)号：US20190119788A1

公开(公告)日：2019-04-25

申请号：US16130629

申请日：2018-09-13

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Kristopher Allen Darling ,  Scott Martin Grendahl ,  Laszlo John Kecskes ,  Kiran N. Solanki ,  Heather Ann Murdoch ,  Thomas Lee Luckenbaugh ,  Anthony James Roberts ,  Billy Chad Hornbuckle

IPC: C22C19/00 ,  B22F3/00 ,  B22F9/00

Abstract: Novel metallic systems and methods for their fabrication provide high temperature machine parts formed of a consolidated nano-crystalline metallic material. The material comprises a matrix formed of a solvent metal having a melting point greater than 1,250° C. with crystalline grains having diameters of no more than about 500 nm, and a plurality of dispersed metallic particles formed on the basis of a solute metal in the solvent metal matrix and having diameters of no more than about 200 nm. The particle density along the grain boundary of the matrix is as high as about 2 nm2 of grain boundary area per particle so as to substantially block grain boundary motion and rotation and limit creep at temperatures above 35% of the melting point of the consolidated nano-crystalline metallic material. The machine parts formed may include turbine blades, gears, hypersonics, radiation shielding, and other high temperature parts.

公开(公告)号：US20190091768A1

公开(公告)日：2019-03-28

申请号：US15716664

申请日：2017-09-27

Applicant: U.S. Army Research laboratory ATTN: RDRL-LOC-I

Inventor： Brandon A. McWilliams ,  Jian H. Yu ,  Jeffrey Zabinski

IPC: B22F3/105 ,  C23C24/08

Abstract: Rapid additive sintering of materials using electric fields includes a pair of electrodes including a first and second electrode, a power supply operatively connected to the pair of electrodes, and an area in between the pair of electrodes that holds a material. The first electrode is configured for flash sintering the material. The first electrode may be movable and may include a stylus. The material may include powder and may include any of metallic and ceramic material. Multiple layers of materials may be flash sintered by the first electrode. The first electrode may generate an electric field between the first electrode and the material causes the flash sintering. A nozzle may supply the material at variable speeds. The first electrode may be configured to move at variable speeds and in variable directions. The flash sintering may occur at an electric field between 10-50000 V/cm and an electric current between 0-30A.