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Results for “FABRICATION”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 1,711 records · Page 95
All sourcesNASA NTRSDOE OSTI
DOE OSTI2018

Methods and systems for fabricating high quality superconducting tapes

An MOCVD system fabricates high quality superconductor tapes with variable thicknesses. The MOCVD system can include a gas flow chamber between two parallel channels in a housing. A substrate tape is heated and then passed through the MOCVD housing such that the gas flow is perpendicular to the tape's surface. Precursors are injected into the gas flow for deposition on the substrate tape. In this way, superconductor tapes can be fabricated with variable thicknesses, uniform precursor deposition, and high critical current densities.

36 MATERIALS SCIENCE↗
DOE OSTI2018

Nanowire and microwire fabrication technique and product

A continuous or semi-continuous process for fabricating nanowires or microwires makes use of the substantially planar template that may be moved through electrochemical solution to grow nanowires or microwires on exposed conductive edges on the surface of that template. The planar template allows fabrication of the template using standard equipment and techniques. Adhesive transfer may be used to remove the wires from the template and in one embodiment to draw a continuous wire from the template to be wound around the drum.

42 ENGINEERING↗
DOE OSTI2018

Alkali semi-metal films and method and apparatus for fabricating them

Methods and systems for fabricating a film, such as, for example, a photocathode, having a tailored band structure and thin-film components that can be tailored for specific applications, such as, for example photocathode having a high quantum efficiency, and simple components fabricated by those methods.

36 MATERIALS SCIENCE↗
DOE OSTI2018

Devices combining thin film inorganic LEDs with organic LEDs and fabrication thereof

Devices including organic and inorganic LEDs are provided. Techniques for fabricating the devices include fabricating an inorganic LED on a parent substrate and transferring the LED to a host substrate via a non-destructive ELO process. Scaling techniques are also provided, in which an elastomeric substrate is deformed to achieve a desired display size.

36 MATERIALS SCIENCE↗
DOE OSTI2018

System and process for friction consolidation fabrication of permanent magnets and other extrusion and non-extrusion structures

A die tool and process are described that provide friction consolidation fabrication and friction consolidation extrusion fabrication products including permanent magnets, and other extrusion and non-extrusion structures. The present invention overcomes previous particle size, texture, homogeneity and density limitations in conventional metallurgy processes.

42 ENGINEERING↗
DOE OSTI2019

Design and Fabrication of a CdMnTe Nuclear Radiation Detection System

Cadmium manganese telluride (CdMnTe) is one of the ternary compounds of cadmium telluride (CdTe) that has shown great potential applications in the development of X-ray and gamma-ray detectors used in medical imaging and in the detection of radiological and nuclear threats. CdMnTe nuclear detectors are capable of operating at room temperature without cryogenic cooling. The goal of this project is to design and fabricate CdMnTe detection system that can be used in laboratory experiments for characterizing detector materials and for identification of radionuclides. The engineering design objectives include a spring-based sample holder, ability to measure electrical properties of CdTe-based semiconductor nuclear detectors, and the detection of nuclear radiations. This paper presents the design of the sample holder and the fabrication of a CdMnTe detector. The current-voltage characterization experimental results showed that the CdMnTe has the high resistivity needed for CdTe-based nuclear detectors. The results also include the response of the CdMnTe detector to the 59.5-keV gamma peak of Am-241 nuclear radiation source.

36 MATERIALS SCIENCE↗
DOE OSTI2019

Devices combining thin film inorganic LEDs with organic LEDs and fabrication thereof

Devices including organic and inorganic LEDs are provided. Techniques for fabricating the devices include fabricating an inorganic LED on a parent substrate and transferring the LED to a host substrate via a non-destructive ELO process. Scaling techniques are also provided, in which an elastomeric substrate is deformed to achieve a desired display size.

Forrest, Stephen R.↗
DOE OSTI2016

Cyanometallate cathode battery and method for fabrication

A method is provided for fabricating a cyanometallate cathode battery. The method provides a cathode of AXM1YM2Z(CN)N.MH2O, where “A” is selected from a first group of metals, and where M1 and M2 are transition metals. The method provides an anode and a metal ion-permeable membrane separating the anode from the cathode. A third electrode is also provided including “B” metal ions selected from the first group of metals. Typically, the first group of metals includes alkali and alkaline metals. The method intercalates “B” metal ions from the third electrode to the anode, the cathode, or both the anode and cathode to form a completely fabricated battery. In one aspect, a solid electrolyte interface (SEI) layer including the “B” metal ions overlies a surface of the anode, the cathode, or both the anode and cathode. A cyanometallate cathode battery is also provided.

25 ENERGY STORAGE↗
DOE OSTI2017

AGR-5/6/7 Fuel Fabrication Feedstock Chemical Purity Specifications

This specification has been prepared to provide fuel fabricators with minimum chemical purity specifications intended to ensure that fuel components have consistent properties and that impurity levels in the as-fabricated fuel is sufficiently low to minimize in-pile TRISO particle failures and to enhance fission product retention. Process chemical purity specifications are given for the following processes: • Kernel forming and sintering • TRISO particle coating • Matrix preparation • TRISO overcoating • Compact carbonization and heat treatment

+↗
DOE OSTI2017

AGR-5/6/7 Fuel Fabrication, Process Documentation, and Disposition Planning

The need for U. S. energy self-sufficiency dictates the development of new low-cost, environmentally-safe forms of energy generation, hydrogen production and industrial heat systems using high temperature gas-cooled reactor (HTGR) technology. Efficient fabrication of ultra-high quality, coated particle fuel is a central requirement for implementing gas reactor technology. Babcock & Wilcox Nuclear Operations Group-Lynchburg (B&W NOG-L) is uniquely qualified in the U.S. with the institutional knowledge, access to equipment, and a Nuclear Regulatory Commission (NRC) license to produce tristructural isotropic (TRISO) coated particle nuclear fuel above 5 wt% 235U. This Statement of Work (SOW) defines the Subcontractor, B&W NOG-L and identifies the work scope to perform Advanced Gas Reactor (AGR)-5/6/7 fuel fabrication, process documentation, and material disposition planning.

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS↗
DOE OSTI2016

AGR-5/6/7 Fuel Fabrication, Process Documentation, and Disposition

The need for U. S. energy self-sufficiency dictates the development of new low-cost, environmentally-safe forms of energy generation, hydrogen production and industrial heat systems using high temperature gas-cooled reactor (HTGR) technology. Efficient fabrication of ultra-high quality, coated particle fuel is a central requirement for implementing gas reactor technology. Babcock & Wilcox Nuclear Operations Group-Lynchburg (B&W NOG-L) is uniquely qualified in the U.S. with the institutional knowledge, access to equipment, and a Nuclear Regulatory Commission (NRC) license to produce tristructural isotropic (TRISO) coated particle nuclear fuel above 5 wt% 235U. This Statement of Work (SOW) defines the Subcontractor, B&W NOG-L and identifies the work scope to perform Advanced Gas Reactor (AGR)-5/6/7 fuel fabrication, process documentation, and material disposition planning.

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS↗
DOE OSTI2016

AGR-5/6/7 Fuel Fabrication, Process Documentation, and Disposition

The need for U. S. energy self-sufficiency dictates the development of new low-cost, environmentally-safe forms of energy generation, hydrogen production and industrial heat systems using high temperature gas-cooled reactor (HTGR) technology. Efficient fabrication of ultra-high quality, coated particle fuel is a central requirement for implementing gas reactor technology. Babcock & Wilcox Nuclear Operations Group-Lynchburg (B&W NOG-L) is uniquely qualified in the U.S. with the institutional knowledge, access to equipment, and a Nuclear Regulatory Commission (NRC) license to produce tristructural isotropic (TRISO) coated particle nuclear fuel above 5 wt% 235U. This Statement of Work (SOW) defines the Subcontractor, B&W NOG-L and identifies the work scope to perform Advanced Gas Reactor (AGR)-5/6/7 fuel fabrication.

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS↗
DOE OSTI2019

Optical systems fabricated by printing-based assembly

Provided are optical devices and systems fabricated, at least in part, via printing-based assembly and integration of device components. In specific embodiments the present invention provides light emitting systems, light collecting systems, light sensing systems and photovoltaic systems comprising printable semiconductor elements, including large area, high performance macroelectronic devices. Optical systems of the present invention comprise semiconductor elements assembled, organized and/or integrated with other device components via printing techniques that exhibit performance characteristics and functionality comparable to single crystalline semiconductor based devices fabricated using conventional high temperature processing methods. Optical systems of the present invention have device geometries and configurations, such as form factors, component densities, and component positions, accessed by printing that provide a range of useful device functionalities. Optical systems of the present invention include devices and device arrays exhibiting a range of useful physical and mechanical properties including flexibility, shapeability, conformability and stretchablity.

Rogers, John↗
DOE OSTI2019

Optical systems fabricated by printing-based assembly

Provided are optical devices and systems fabricated, at least in part, via printing-based assembly and integration of device components. In specific embodiments the present invention provides light emitting systems, light collecting systems, light sensing systems and photovoltaic systems comprising printable semiconductor elements, including large area, high performance macroelectronic devices. Optical systems of the present invention comprise semiconductor elements assembled, organized and/or integrated with other device components via printing techniques that exhibit performance characteristics and functionality comparable to single crystalline semiconductor based devices fabricated using conventional high temperature processing methods. Optical systems of the present invention have device geometries and configurations, such as form factors, component densities, and component positions, accessed by printing that provide a range of useful device functionalities. Optical systems of the present invention include devices and device arrays exhibiting a range of useful physical and mechanical properties including flexibility, shapeability, conformability and stretchablity.

Rogers, John↗
DOE OSTI2019

Methods and systems for fabricating high quality superconducting tapes

An MOCVD system fabricates high quality superconductor tapes with variable thicknesses. The MOCVD system can include a gas flow chamber between two parallel channels in a housing. A substrate tape is heated and then passed through the MOCVD housing such that the gas flow is perpendicular to the tape's surface. Precursors are injected into the gas flow for deposition on the substrate tape. In this way, superconductor tapes can be fabricated with variable thicknesses, uniform precursor deposition, and high critical current densities.

36 MATERIALS SCIENCE↗
DOE OSTI2019

Optical systems fabricated by printing-based assembly

Provided are optical devices and systems fabricated, at least in part, via printing-based assembly and integration of device components. In specific embodiments the present invention provides light emitting systems, light collecting systems, light sensing systems and photovoltaic systems comprising printable semiconductor elements, including large area, high performance macroelectronic devices. Optical systems of the present invention comprise semiconductor elements assembled, organized and/or integrated with other device components via printing techniques that exhibit performance characteristics and functionality comparable to single crystalline semiconductor based devices fabricated using conventional high temperature processing methods. Optical systems of the present invention have device geometries and configurations, such as form factors, component densities, and component positions, accessed by printing that provide a range of useful device functionalities. Optical systems of the present invention include devices and device arrays exhibiting a range of useful physical and mechanical properties including flexibility, shapeability, conformability and stretchablity.

71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSIC↗
DOE OSTI2019

Progress and Challenges in Absorber and Interface Fabrication of Polycrystalline CdTe Photovoltaics

Polycrystalline thin-film CdTe device efficiency of over 19% has been achieved at Colorado State University using a highly repeatable and scalable sublimation process. Record efficiency for research scale CdTe photovoltaics has been reported to be over 22% and highest reported module efficiency is over 18% by First Solar Inc. Use of Se alloying with CdTe to form a lower band-gap CdSexTe1-x (CST) alloy has led to higher devices efficiencies with better current collection. Recent materials characterization has revealed that Se may be responsible for more than just reduction of band-gap. With CdCl2 treatment Cl is known to very effectively passivate defects at CdTe grain boundaries. Recent materials and electrical characterization have shown that Se has a very similar behavior to Cl at the grain boundaries of polycrystalline CdTe. These include Se decorating the grain boundaries like Cl in the diffusion region between CST and CdTe while cross-section cathodoluminescence maps show substantially higher signal intensity in regions with Se. Double heterostructures fabricated using CdSeTe with Al2O3 as a passivating oxide have been measured to have several hundred nanosecond bulk recombination lifetime. These films were also measured to have surface recombination velocity of under 100 cm/s. These results among others emphasis that Se also helps in passivation of grain boundaries. High absorber quality may help in mitigating the voltage deficit that has traditionally been the largest limiting factor in CdTe photovoltaics in achieving efficiency closer to Shockley-Queisser limit. In addition to graded absorber devices and double heterostructures, replacing the traditional Cu doping with more advanced group V doping is an important research effort that maybe critical for future improvements in device efficiency. Nitrogen, Phosphorous, Arsenic and Antimony doping has been investigated by several research groups. Advanced co-sublimation hardware developed at Colorado State University provides researchers with a unique capability of depositing films for group V doping with Cd overpressure. Such deposition under Cd overpressure causes formation of CdV which is known to be favorable for incorporation of group V dopant and activation. Utilizing the high absorber and interface quality material and higher doping, efforts are in progress to fabricate polycrystalline devices with open-circuit voltage over 1V and device efficiency over 24%.

Munshi, Amit↗
DOE OSTI2020

Redirecting data to improve page locality in a scalable data fabric

A data processing system includes a host processor, a local memory coupled to the host processor, a plurality of remote memory media, and a scalable data fabric coupled to the host processor and to the plurality of remote memory media. The scalable data fabric includes a filter for storing information indicating a location of data that is stored by the data processing system. The host processor includes a hardware sequencer coupled to the filter for selectively moving data stored by the filter to the local memory.

97 MATHEMATICS AND COMPUTING↗