Results 111 to 120 of about 50,205 (297)

Strain Rate Dependent Ductile-to-Brittle Transition of Graphite Platelet Reinforced Vinyl Ester Nanocomposites

open access: yesAdvances in Materials Science and Engineering, 2014
In previous research, the fractal dimensions of fractured surfaces of vinyl ester based nanocomposites were estimated applying classical method on 3D digital microscopic images.
Brahmananda Pramanik, P. Raju Mantena
doaj   +1 more source

Mechanism of Unstable Material Removal Modes in Micro Cutting of Silicon Carbide

open access: yesMicromachines, 2019
This study conducts large-scale molecular dynamics (MD) simulations of micro cutting of single crystal 6H silicon carbide (SiC) with up to 19 million atoms to investigate the mechanism of unstable material removal modes within the transitional range of ...
Wei Zhao, Haibo Hong, Hongzhi Wang
doaj   +1 more source

Dislocation activity and brittle-ductile transitions in single crystals

open access: yesMaterials Science and Engineering: A, 1994
Abstract Experimental work on the brittle-ductile transition (BDT) has shown that the activation energy for the BDT is equal to that for dislocation glide in silicon, germanium and sapphire. Simple models, based on the shielding effect of a single evolving array of dislocations, can account for most features of the BDT in such materials. These models
Roberts, S, Booth, A, Hirsch, P
openaire   +2 more sources

Magnetic Textiles: A Review of Materials, Fabrication, Properties, and Applications

open access: yesAdvanced Materials Technologies, EarlyView.
Magnetic textiles (M‐textiles) are emerging as a programmable materials platform that merges magnetic matter with hierarchical textile structures. This article consolidates magnetic material classes, textile architectures, and fabrication and magnetization strategies, revealing structure–property–function relationships that govern magneto‐mechanical ...
Li Ke   +3 more
wiley   +1 more source

Breaking the Toughness‐Stretchability Trade‐Off in Hydrogels with Dynamic Hydrogen Bonding

open access: yesAdvanced Science, EarlyView.
A novel nanocomposite hydrogel architecture overcomes the inherent conflict between toughness and stretchability by integrating uniformly dispersed aminopropyl‐hybrid‐phyllosilicate nanosheets within a polyacrylamide matrix. This design leverages a dynamic hydrogen‐bonding network to facilitate efficient energy dissipation and self‐recovery.
Yining Gao   +3 more
wiley   +1 more source

Indentation plasticity and fracture in silicon [PDF]

open access: yes
Measurements of the ductile-brittle transition temperature of heavily doped silicon were carried out using indentation techniques. Diamond pyramid hardness tests were performed on the (100) face of heavily doped N-type and P-type and intrinsic silicon ...
Pirouz, P., Rybicki, George C.
core   +1 more source

Architected Inverse Nacre Hydrogels With High Strength and Crack‐Insensitive Toughness

open access: yesAdvanced Science, EarlyView.
Hydrogels hold promise for biomedical and engineering applications, yet their practical use is fundamentally limited by the strength‐toughness trade‐off and poor fatigue resistance. In this study, a bioinspired inverse nacre architecture constructed via a scalable thermo‐calendering process is introduced, which overcomes these classic limitations ...
Haidi Wu   +10 more
wiley   +1 more source

Finite temperature molecular dynamics study of unstable stacking fault free energies in silicon

open access: yes, 1998
We calculate the free energies of unstable stacking fault (USF) configurations on the glide and shuffle slip planes in silicon as a function of temperature, using the recently developed Environment Dependent Interatomic Potential (EDIP).
A. Antonelli   +20 more
core   +1 more source

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