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Displaying 26 - 50 of 1005

Compact 1.7 K Cryocooler for Superconducting Nanowire Single-Photon Detectors

June 18, 2020
Author(s)
Vincent Y. Kotsubo, Joel N. Ullom, Sae Woo Nam
… acceptance. Toward this end, we are developing a compact 1.7 K closed-cycle pulse tube/Joule-Thomson hybrid cryocooler … coldhead has demonstrated over 1.4 mW of cooling at 1.7 K. The Joule-Thomson compressor is under development and … Compact 1.7 K Cryocooler for Superconducting Nanowire Single-Photon …

On the Dynamic Mechanical Behavior of Wrought and AM 17-4 Precipitation-Hardenable Stainless Steels Under Rapid Heating

May 6, 2024
Author(s)
Steven P. Mates, Saadi Habib, James Zuback, Fan Zhang
… behavior of a precipitation-hardenable stainless steel (17-4) produced by wrought and Additive Manufacturing (AM) … with a rapidly-heated Kolsky bar technique. Wrought 17-4 is examined in three common heat treatments … times limited to ≈ three seconds. Solution-treated wrought 17-4 is observed to thermally-harden at aging temperatures (> …

Additive Manufacturing of 17-4 PH Stainless Steel: Post Processing Heat Treatment to Achieve Uniform Reproducible Microstructure

December 21, 2015
Author(s)
Sudha Cheruvathur, Eric Lass, Carelyn E. Campbell
… 17-4 precipitation hardenable (PH) stainless steel is a … manufacturing (AM), specifically laser powder-bed fusion, 17-4 PH exhibits a dendritic structure containing a … in comparison to that of conventionally produced wrought 17-4 PH with the intention of creating a more uniform, fully …

Powder Thermal Conductivity Measurements in L-PBF using Powder-Included Build Specimens: Internal Geometry Effect

September 3, 2020
Author(s)
Shanshan Zhang, Brandon Lane, Kevin Chou
… This study investigates the thermal conductivity of 17-4PH stainless steel powder that was encapsulated into … The results reveal that the thermal conductivity of 17-4PH powder ranges from 0.67 W/(m∙K) to 1.34 W/(m∙K) at 100 … ratio of the powder to the solid counterpart of 17-4PH approximately ranges from 3.9 % to 5.5 % at tested …

Chapter 17 Shock and Vibration Standards

March 1, 2010
Author(s)
David J. Evans, Henry C. Pussey
… Chapter 17 is concerned with shock and vibration standards covering: … Chapter 17 Shock and Vibration Standards …

National Voluntary Laboratory Accreditation Program (NVLAP) Cryptographic and Security Testing

September 13, 2022
Author(s)
Bradley Moore, James F. Fox, Beverly Trapnell, Carolyn French
… NIST Handbook 150-17 presents the technical requirements and guidance for the … under this program. The 2022 edition of NIST Handbook 150-17 introduces the new Annex H, requirements for Entropy … requirements and interpretations in NIST Handbook 150-17 must be combined to produce the criteria for accreditation …

Micromechanical response quantification using high-energy X-rays during phase transformations in additively manufactured 17-4 stainless steel

May 10, 2019
Author(s)
Thien Q. Phan, Felix Kim, Darren C. Pagan
… Recent studies of additively manufactured (AM) 17-4 stainless steel produced via laser powder bed fusion of … with the fully martensitic microstructure of wrought 17-4. These AM 17-4 stainless steels have metastable microstructures that … during phase transformations in additively manufactured 17-4 stainless steel …

Measuring extended red sensitivity in a 1.7mm-cutoff HgCdTe detector array

August 5, 2016
Author(s)
Ryan C. Terrien, Andrew J. Monson, Chad Bender, Samuel P. Halverson, Larry Ramsey
… Infrared detectors with cutoff wavelengths of ∼ 1.7 μm have much lower sensitivity to thermal background … to evaluate the long-wavelength sensitivity tail of a 1.7 μm-cutoff HAWAII-2RG array using a thermal blocking …

Metal-Insulator Transition Tuned by Magnetic Field in Bi 1.7 V 8 O 16 Hollandite

May 1, 2017
Author(s)
Amber M. Larson, Brandon Wilfong, Pouya Moetakef, Craig Brown, Peter Zavalij, Efrain E. Rodriguez
… vanadium cations. Unlike all other known vanadates, Bi 1.7 V 8 O 16 displays non-spin-singlet formation upon … Metal-Insulator Transition Tuned by Magnetic Field in Bi 1.7 V 8 O 16 Hollandite …

Ratio of the Al + and Hg + Optical Clock Frequencies to 17 Decimal Places

August 25, 2008
Author(s)
Wayne M. Itano, Till P. Rosenband, David Hume, P.O. Schmidt, Chin-Wen Chou, A. Brusch, Luca Lorini, Windell Oskay, Robert E. Drullinger, Sarah Bickman, Tara M. Fortier, Jason Stalnaker, Scott A. Diddams, William C. Swann, Nathan R. Newbury, David J. Wineland, James C. Bergquist
… achieved absolute reproducibilities of a few parts in 10 17 . Development of femtosecond laser frequency combs makes … Ratio of the Al + and Hg + Optical Clock Frequencies to 17 Decimal Places …

Bi 12 O 17 Cl 2 with a Sextuple Bi-O Layer Composed of Rock-Salt and Fluorite Units and its Structural Conversion through Fluorination to Enhance Photocatalytic Activity

October 10, 2022
Author(s)
Daichi Kato, Osamu Tomita, Ryky Nelson, Maria A. Kirsanova, Richard Dronskowski, Hajime Suzuki, Chengchao Zhong, Cedric Tassel, Kohdai Ishida, Yosuke Matsuzaki, Craig Brown, Koji Fujita, Kotaro Fujii, Masatomo Yashima, Yoji Kobayashi, Akinori Saeki, Itaru Oikawa, Hitoshi Takamura, Ryu Abe, Hiroshi Kageyama, Tatiana E. Gorelik, Artem M. Abakumov
… Here we show that a structurally uncharacterized Bi 12 O 17 Cl 2 , which has been extensively studied as a … (F:O = 2:1) reaction with the composition of Bi 12 O 17–0.5x F x Cl 2 (x = 4–6), resulting in the elimination of … Bi 12 O 17 Cl 2 with a Sextuple Bi-O Layer Composed of Rock-Salt and …

Non-fullerene acceptors with direct and indirect hexa-fluorination afford > 17% efficiency in polymer solar cells

December 22, 2021
Author(s)
Subhrangsu Mukherjee, Guoping Li, Liang-Wen Feng, Leighton Jones, Robert Jacobberger, Wei Huang, Ryan Young, Robert Pankow, Weigang Zhu, Norman Lu, Kevin Kohlstedt, Vinod Sangwan, Michael Wasielewski, Mark Hersam, George Schatz, Dean DeLongchamp, Antonio Facchetti, Tobin Marks
… 1-chloronaphthalene, affording high PCE values of 17.30% (BTF + additive) and 17.10% (BTFM, no-additive). The BTF vs. BTFM OSC performance … with direct and indirect hexa-fluorination afford > 17% efficiency in polymer solar cells …

Machine Learning Methods for Predicting Seismic Retrofit Costs

September 23, 2020
Author(s)
Juan F. Fung, Siamak Sattar, David Butry, Steven L. McCabe
Aging building clusters all around the world, especially in high seismic regions, will require a retrofit approach to improve the resilience of the built environment. One of the main challenges of retrofitting existing buildings is the associated cost
Displaying 26 - 50 of 1005
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