Results 101 to 110 of about 80,438 (295)

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +1 more source

Phase transitions in the ordered compound TiAl and in alloys having it as a base [PDF]

The combined effect of alloying and heat treatment on the order-disorder transition in TiAl of stoichiometric composition was investigated. It is concluded from the data obtained that the TiAl 1 to TiAl 2 transition is a phase transition of the second ...
Martynchuk, E. N., Zelenkov, I. A.
core   +1 more source

Superconducting RF Technology R&D for Future Accelerator Applications

, 2012
Superconducting rf technology (SRF) is evolving rapidly as are its applications. While there is active exploitation of what one may term the current state-of-the-practice, there is also rapid progress expanding in several dimensions the accessible and ...
Ciovati, Gianluigi, Reece, Charles E.
core   +1 more source

Enhanced Strength and Corrosion Resistance of Ti‐13Nb‐12Ta‐10Zr‐4Sn Alloy by Aging Treatment

Advanced Engineering Materials, EarlyView.
This work systematically investigates the effect of aging treatment on mechanical properties and corrosion behavior of vacuum arc‐melted Ti‐13Nb‐12Ta‐10Zr‐4Sn alloy. Owing to the increased α″ martensite, strength and corrosion resistance were significantly enhanced by aging treatment.
Yuhua Li, Rong Zhao, Qian Zhang, Haojie Wang, Yujing Liu, Lai‐Chang Zhang   +5 more
wiley   +1 more source

Systematic improvements in transmon qubit coherence enabled by niobium surface encapsulation

npj Quantum Information
We present a transmon qubit fabrication technique that yields systematic improvements in T 1 relaxation times. We encapsulate the surface of niobium and prevent the formation of its lossy surface oxide.
Mustafa Bal, Akshay A. Murthy, Shaojiang Zhu, Francesco Crisa, Xinyuan You, Ziwen Huang, Tanay Roy, Jaeyel Lee, David van Zanten, Roman Pilipenko, Ivan Nekrashevich, Andrei Lunin, Daniel Bafia, Yulia Krasnikova, Cameron J. Kopas, Ella O. Lachman, Duncan Miller, Josh Y. Mutus, Matthew J. Reagor, Hilal Cansizoglu, Jayss Marshall, David P. Pappas, Kim Vu, Kameshwar Yadavalli, Jin-Su Oh, Lin Zhou, Matthew J. Kramer, Florent Lecocq, Dominic P. Goronzy, Carlos G. Torres-Castanedo, P. Graham Pritchard, Vinayak P. Dravid, James M. Rondinelli, Michael J. Bedzyk, Mark C. Hersam, John Zasadzinski, Jens Koch, James A. Sauls, Alexander Romanenko, Anna Grassellino   +39 more
doaj   +1 more source

Diamagnetic response of cylindrical normal metal - superconductor proximity structures with low concentration of scattering centers

, 1998
We have investigated the diamagnetic response of composite NS proximity wires, consisting of a clean silver or copper coating, in good electrical contact to a superconducting niobium or tantalum core.
A. C. Mota, A. C. Mota, A. C. Mota, A. D. Zaikin, A. F. Andreev, A. I. Larkin, A. L. Fauchère, Ana Celia Mota, C. Bruder, F. Bernd Müller-Allinger, G. Deutscher, G. Eilenberger, J. C. Weber, K. D. Usadel, L. N. Cooper, P. G. de Gennes, P. Visani, R. Holm, Th. Bergmann, W. Belzig, W. Belzig, Wolfgang Belzig, Y. Oda   +22 more
core   +1 more source

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

Advanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir, Jixing Lin, Yuncang Li, Li Zhu, Paul F. A. Wright, Cuie Wen   +5 more
wiley   +1 more source

Experimental study on the extraction of niobium from crude niobium ore by KOH hydrothermal

矿业科学学报, 2017
Because the crude niobium ore is difficult to be used, according to the composition analysis and phase analysis of crude niobium ore, the KOH hydrothermal method was used to research the dissolution of crude niobium ore and the dissolution of crude ...
Wang Weidong, Li Zhao, Wang Xiaohui, Zheng Shili   +3 more
doaj  

Evaluation of niobium as candidate electrode material for dc high voltage photoelectron guns

Physical Review Special Topics. Accelerators and Beams, 2012
The field emission characteristics of niobium electrodes were compared to those of stainless steel electrodes using a DC high voltage field emission test apparatus.
M. BastaniNejad, Md. Abdullah Mohamed, A. A. Elmustafa, P. Adderley, J. Clark, S. Covert, J. Hansknecht, C. Hernandez-Garcia, M. Poelker, R. Mammei, K. Surles-Law, P. Williams   +11 more
doaj   +1 more source

In Situ Micromechanical Study of Bimodal γ′–γ″ Precipitate Assemblies in Ni–Cr–Al–Nb Superalloy

Advanced Engineering Materials, EarlyView.
A Ni–Cr–Al–Nb superalloy with a bimodal γ′–γ″ precipitate distribution is developed. Composite precipitate assemblies form through heterogeneous nucleation, effectively impeding dislocation motion. Micropillar compression reveals high strength at room and elevated temperatures, governed by precipitate shearing, with coupled faulting mechanisms ...
Ujjval Bansal, Tae‐Hyeok Kang, Pyuck‐Pa Choi, Subin Lee, Christoph Kirchlechner   +4 more
wiley   +1 more source