Results 71 to 80 of about 812,429 (344)

Oxide‐Based Ceramic Matrix Composites for High‐Temperature Environments: A Review

Advanced Engineering Materials, EarlyView.
This review examines oxide‐based ceramic matrix composites, focusing on their processing, composition, and mechanical properties for high‐temperature applications. Key topics include oxidation resistance, failure mechanisms, and corrosion behavior, with insights into their potential use in aerospace, nuclear power, and other high‐performance industries.
Karthikeyan Ramachandran, Joseph C. Bear, Doni Daniel Jayaseelan   +2 more
wiley   +1 more source

Black holes of dimensionally continued gravity coupled to Born–Infeld electromagnetic field

Physics Letters B, 2018
In this paper, for dimensionally continued gravity coupled to Born–Infeld electromagnetic field, we construct topological black holes in diverse dimensions and construct dyonic black holes in general even dimensions.
Kun Meng, Da-Bao Yang
doaj  

Observational Evidence for Cosmological Coupling of Black Holes and its Implications for an Astrophysical Source of Dark Energy

The Astrophysical Journal Letters, 2023
Observations have found black holes spanning 10 orders of magnitude in mass across most of cosmic history. The Kerr black hole solution is, however, provisional as its behavior at infinity is incompatible with an expanding universe.
Duncan Farrah, Kevin S. Croker, Michael Zevin, Gregory Tarlé, Valerio Faraoni, Sara Petty, Jose Afonso, Nicolas Fernandez, Kurtis A. Nishimura, Chris Pearson, Lingyu Wang, David L Clements, Andreas Efstathiou, Evanthia Hatziminaoglou, Mark Lacy, Conor McPartland, Lura K Pitchford, Nobuyuki Sakai, Joel Weiner   +18 more
doaj   +1 more source

Moduli Spaces for Four- and Five- Dimensional Black Holes [PDF]

, 2000
We propose a universal expression for the moduli metric of a class of four- and five-dimensional black holes which preserve at least four supersymmetries.
A. A. Tseytlin, A. Chamseddine, A. Chamseddine, A. Chou, A. Dabholkar, A. H. Chamseddine, A. Strominger, A. Tseytlin, B. de Wit, B. de Wit, C. G. Callan, Jr., C. G. Callan, Jr., C. V. Johnson, E. Cremmer, G. Papadopoulos, G. Papadopoulos, G. Papadopoulos, G. T. Horowitz, G. W. Gibbons, G. W. Gibbons, G. W. Gibbons, G. W. Gibbons, G. W. Gibbons, I. Antoniadis, I. Gauda, I. R. Klebanov, J. Gutowski, J. Gutowski, J. Michelson, K. Behrndt, K. Shiraishi, M. Bertolini, M. Cvetic, M. Cvetic, M. Cvetic, M. Cvetic, M. Cvetic, M. Günaydin, M. Günaydin, M. J. Duff, M. J. Duff, M. S. Costa, P. Claus, P. K. Townsend, P. S. Howe, R. A. Coles, R. C. Ferrell, R. Guyen, R. Kallosh, V. Balasubramanian, V. de Alfaro, W. A. Sabra   +51 more
core   +2 more sources

Quantum black holes [PDF]

Physical Review D, 1992
Static solutions of large-$N$ quantum dilaton gravity in $1+1$ dimensions are analyzed and found to exhibit some unusual behavior. As expected from previous work, infinite-mass solutions are found describing a black hole in equilibrium with a bath of Hawking radiation.
Jeffrey A. Harvey, Björn Birnir, Steven B. Giddings, Andrew Strominger   +3 more
openaire   +3 more sources

A Perspective on Powder Metallurgy and Additive Manufacturing of High‐Nitrogen Alloyed Stainless Steels

Advanced Engineering Materials, EarlyView.
This perspective article explores an innovative powder metallurgical approach to producing high‐nitrogen steels by utilizing a mixture of stainless steel and Si3N4. This mixture undergoes hot isostatic pressing followed by direct quenching. The article also examines adapting this method to laser powder bed fusion (PBF‐LB/M) to overcome nitrogen ...
Louis Becker, Felix Radtke, Jonathan Lentz, Simone Herzog, Christoph Broeckmann, Sebastian Weber   +5 more
wiley   +1 more source

Horizon Mass Theorem

, 2005
A new theorem for black holes is found. It is called the horizon mass theorem. The horizon mass is the mass which cannot escape from the horizon of a black hole.
Hawking S. W., Nordström G., Penrose R., Reissner H., YUAN K. HA   +4 more
core   +2 more sources

Black Holes

, 2002
43 pages, springer style, several ps files. to appear in the proceedings of the Tuebingen conference on conformal structure of space-time, J. Frauendiener, H.
openaire   +2 more sources

Vortices in Black Holes

Physical Review Letters, 2022
We argue that black holes admit vortex structure. This is based both on a graviton-condensate description of a black hole as well as on a correspondence between black holes and generic objects with maximal entropy compatible with unitarity, so-called saturons.
Gia Dvali, Florian Kühnel, Michael Zantedeschi   +2 more
openaire   +4 more sources

Tailoring the Properties of 2D Nanomaterial‐Polymer Composites for Electromagnetic Interference Shielding and Energy Storage by 3D Printing—A Review

Advanced Engineering Materials, EarlyView.
This article critically reviews the recent advances in the development of nanomaterial‐based inks derived from 2D nanomaterials and how the addition of 2D nanomaterials alters the rheology of different polymers for 3D printing. The review further explores the application of 3D‐printed structures in the electronics, sensor, and energy sectors.
Amanuel Gebrekrstos, Tanyaradzwa S. Muzata, Anastasia Elias, Suprakas Sinha Ray   +3 more
wiley   +1 more source