Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Coulomb_explosion> ?p ?o. }
Showing items 1 to 31 of
31
with 100 items per page.
- Coulomb_explosion abstract "A Coulomb explosion is a mechanism for coupling electronic excitation energy from intense electromagnetic fields into atomic motion. The Coulombic repulsion of particles having the same electric charge can break the bonds that hold solids together. When done with a narrow laser beam, a small amount of solid explodes into a plasma of ionized atomic particles.With their low mass, outer valence electrons responsible for chemical bonding are easily stripped from atoms, leaving them positively charged. Given a mutually repulsive state between atoms whose chemical bonds are broken, the material explodes into a small plasma cloud of energetic ions with higher velocities than seen in thermal emission.A Coulomb explosion is one particular mechanism that permits laser-based machining.Coulomb explosions for industrial machining are made with brief (picosecond or high femtoseconds) laser pulses. The enormous beam intensities required (10–400 terawatt per square centimeter thresholds, depending on material)[citation needed] are only practical to generate, shape and deliver for very brief instants of time.A Coulomb explosion is a "cold" alternative to the dominant laser etching technique of thermal ablation, which depends on local heating, melting, and vaporization of molecules and atoms using less-intense beams. Pulse brevity down only to the nanosecond regime is sufficient to localize thermal ablation – before the heat is conducted far, the energy input (pulse) has ended. Nevertheless, thermally ablated materials may seal pores important in catalysis or battery operation, and recrystallize or even burn the substrate, thus changing the physical and chemical properties at the etch site. In contrast, even light foams remain unsealed after ablation by Coulomb explosion.Coulomb explosion etching can be used in any material to bore holes, remove surface layers, and texture and microstructure surfaces; e.g., to control ink loading in printing presses.".
- Coulomb_explosion thumbnail Bucky1.gif?width=300.
- Coulomb_explosion wikiPageID "1248251".
- Coulomb_explosion wikiPageRevisionID "593863498".
- Coulomb_explosion hasPhotoCollection Coulomb_explosion.
- Coulomb_explosion subject Category:Laser_applications.
- Coulomb_explosion subject Category:Materials_science.
- Coulomb_explosion subject Category:Mechanisms.
- Coulomb_explosion type Abstraction100002137.
- Coulomb_explosion type Application106570110.
- Coulomb_explosion type Code106355894.
- Coulomb_explosion type CodingSystem106353757.
- Coulomb_explosion type Communication100033020.
- Coulomb_explosion type LaserApplications.
- Coulomb_explosion type Program106568978.
- Coulomb_explosion type Software106566077.
- Coulomb_explosion type Writing106359877.
- Coulomb_explosion type WrittenCommunication106349220.
- Coulomb_explosion comment "A Coulomb explosion is a mechanism for coupling electronic excitation energy from intense electromagnetic fields into atomic motion. The Coulombic repulsion of particles having the same electric charge can break the bonds that hold solids together.".
- Coulomb_explosion label "Coulomb explosion".
- Coulomb_explosion label "Coulomb-Explosion".
- Coulomb_explosion label "Esplosione coulombiana".
- Coulomb_explosion sameAs Coulomb-Explosion.
- Coulomb_explosion sameAs Esplosione_coulombiana.
- Coulomb_explosion sameAs m.09gf04n.
- Coulomb_explosion sameAs Q1136969.
- Coulomb_explosion sameAs Q1136969.
- Coulomb_explosion sameAs Coulomb_explosion.
- Coulomb_explosion wasDerivedFrom Coulomb_explosion?oldid=593863498.
- Coulomb_explosion depiction Bucky1.gif.
- Coulomb_explosion isPrimaryTopicOf Coulomb_explosion.