Results 51 to 60 of about 11,906 (259)

Extrusion‐Based Additive Manufacturing of Advanced Ceramics: Strengthening Mechanisms and Process Optimization Review

Advanced Engineering Materials, EarlyView.
This review comprehensively evaluates extrusion‐based additive manufacturing for advanced ceramics, detailing feedstock options and key process parameters. By critically addressing defect mechanisms like porosity and cracking, the work highlights optimization strategies through machine learning and advanced postprocessing.
Meisam Bakhtiari, Mohammad Hadi Sheikh‐Ansari, Avinash Borgaonkar, Mehran Dadkhah, Abdollah Saboori   +4 more
wiley   +1 more source

An atomically controlled insulator-to-metal transition in iridate/manganite heterostructures

Nature Communications
All-insulator heterostructures with an emerging metallicity are at the forefront of material science, which typically contain at least one band insulator while it is not necessary to be.
Enyang Men, Deyang Li, Haiyang Zhang, Jingxin Chen, Zhihan Qiao, Long Wei, Zhaosheng Wang, Chuanying Xi, Dongsheng Song, Yuhan Li, Hyoungjeen Jeen, Kai Chen, Hong Zhu, Lin Hao   +13 more
doaj   +1 more source

High‐Resolution Corrosion Fingerprinting of Alloy Libraries via Microdroplet Spectroelectrochemistry

Advanced Engineering Materials, EarlyView.
Ionic‐liquid microdroplet spectroelectrochemistry enables stable, localized electrochemical measurements over extended timescales. By coupling impedance spectroscopy, wetting analysis, finite‐element simulations, and operando Raman spectroscopy, it disentangles geometrical and electrochemical effects, opening new opportunities for rapid corrosion ...
Ekaterina Kurchavova, Oumaïma Gharbi, Mireille Turmine, Vincent Vivier   +3 more
wiley   +1 more source

Metal-Insulator Transitions in the Periodic Anderson Model [PDF]

Physical Review Letters, 2007
We solve the Periodic Anderson model in the Mott-Hubbard regime, using Dynamical Mean Field Theory. Upon electron doping of the Mott insulator, a metal-insulator transition occurs which is qualitatively similar to that of the single band Hubbard model, namely with a divergent effective mass and a first order character at finite temperatures ...
Sordi, G., Amaricci, A., Rozenberg, M. J.   +2 more
openaire   +4 more sources

Gaps and pseudogaps in perovskite rare earth nickelates

APL Materials, 2015
We report on tunneling measurements that reveal the evolution of the quasiparticle state density in two rare earth perovskite nickelates, NdNiO3 and LaNiO3, that are close to a bandwidth controlled metal to insulator transition. We measure the opening of
S. James Allen, Adam J. Hauser, Evgeny Mikheev, Jack Y. Zhang, Nelson E. Moreno, Junwoo Son, Daniel G. Ouellette, James Kally, Alex Kozhanov, Leon Balents, Susanne Stemmer   +10 more
doaj   +1 more source

Multilayer Self‐Limiting Electrospray Deposition via Stepped Voltage Bias

Advanced Engineering Materials, EarlyView.
Self‐limiting electrospray deposition (SLED) uses a high voltage to generate and deposit a charged payload on a target surface. The coating retains its charge, repelling newly arriving material. SLED thickness can be decreased by applying a secondary bias to the target.
Madhuri Deb, S. Rahman Pejman, Alexander Jakimowicz, Jonathan P. Singer   +3 more
wiley   +1 more source

Metal-Insulator Transition in Graphene on Boron Nitride [PDF]

Physical Review Letters, 2014
Electrons in graphene aligned with hexagonal boron nitride are modelled by Dirac fermions in a correlated random-mass landscape subject to a scalar- and vector-potential disorder. We find that the system is insulating in the commensurate phase since the average mass deviates from zero.
M. Titov, M. I. Katsnelson
openaire   +4 more sources

Tunable RF Phase Shifters Based on Vanadium Dioxide Metal Insulator Transition

IEEE Journal of the Electron Devices Society, 2018
This paper presents the design, fabrication, and electrical characterization of a reconfigurable RF capacitive shunt switch that exploits the electro-thermally triggered vanadium dioxide (VO2) insulator to metal phase transition. The RF switch is further
Emanuele Andrea Casu, Nicolo Oliva, Matteo Cavalieri, Andrei A. Muller, Alessandro Fumarola, Wolfgang A. Vitale, Anna Krammer, Andreas Schuler, Montserrat Fernandez-Bolanos, Adrian M. Ionescu   +9 more
doaj   +1 more source

The Influence of Field‐Assisted Sintering Technology (FAST) Temperature and Cooling Rate on the Microstructural Evolution in Gamma‐Titanium Aluminide Alloy GE4822

Advanced Engineering Materials, EarlyView.
Controlling the Field Assisted Sintering Technology (FAST) parameters, dwell temperature and cooling rate, significantly influences the microstructural evolution in titanium aluminide GE4822. Significant γ‐lamellar colonies develop only upon cooling through the α‐transus.
Jack Krohn, James Pepper, Martin Jackson
wiley   +1 more source

Metal-insulator transition in a generalized Hubbard model [PDF]

Physical Review Letters, 1992
An extension of the Hubbard model, earlier introduced, is studied using exact diagonalization and quantum Monte Carlo methods. Our numerical results for the static and dynamic properties of one- and two-dimensional systems strongly suggest the occurrence of a metal-insulator transition.
Michielsen, K., De Raedt, H., Schneider, T.   +2 more
openaire   +3 more sources