Laser Processing of Metal Nanoparticle/Polymer Composites
2008
Sign up for access to the world's latest research
Abstract
The present invention is related to methods of forming articles having closed microcharmels from composite substrates using laser processing and resulting articles including articles having closed microcharmels.
Related papers
A system and method for making nanoparticles. The system includes a first cathode including a first metal tube associated with a first end and a second end, a first anode including a second metal tube associated with a third end and a fourth end, and a first container including a first gas inlet. The first end and the third end are located inside the first container. The first end and the third end are separated by a first gap, the first metal tube is configured to allow a first gas to flow from the second end to the first end, and the first container is configured to allow a second gas to flow from the first gas inlet into the second metal tube through at least a first part of the first gap.
Nanostructured Materials, 1998
The results showed that mean particle diameters were normally in the range from 10 to 100 nm and that the particle size distributions were generally log-normal, with dispersion (diameterlstandard deviation) ranging from 0.2 to 0.5. For metallic microparticle feedstock, the mean size of the produced nanoparticles generally increased with increasing laserjluence and were smallestforfluences not too far above the breakdown threshold. 01998Acta Metallurgica Inc.
Method to improve the mechanical properties of nano materials, micromaterials and short fibers by indirect exposure to laser irradiations. The method was done by dipping powder materials in transparent plastics to allow the passage of a laser beam through it without being absorbed or interact with transparent material. The laser affect the structure of powder and improve properties, After exposure organic solvent is used to dissociate the transparent plastics , the treated nanomaterials or short fibers were collected. The method is a physical process free of pollutants and exhaust, it do not cause economic losses in the amount of material treated.
IntechOpen, 2018
Recently, the synthesis and application of metal and ceramic nanoparticle are significant subject in science and engineering. The metal nanoparticles such as silver, gold, and copper nanoparticles have more application in material science, nanomedicine, electronic, photonic, and art. One of the green methods for preparation of metal nanoparticles is laser ablation technique that offers a unique tool for nanofabrication of nanoparticles. In this technique, the high-power laser ablates the metal plate and the nanoparticles are formed in the liquid. The properties of nanoparticles using laser ablation are unique, and they are not reproducible by any other method such as chemical methods. The important parameters to produce the metal nanoparticles are energy, wavelength, repetition rate of laser, ablation time, and absorption of an aqueous solution. Laser ablation is a simple method for fabricating the metal nanoparticles without surfactant or chemical addition. In this chapter, the mechanism of formation of metal nanoparticles in liquid, significant parameters for using the laser ablation technique to prepare the metal nanoparticles, and the preparation of silver, gold and copper nanoparticles will be reviewed. mechanism of laser ablation in liquid, effect of wavelength in laser ablation, effect of temperature in laser ablation, laser ablation setup
Assembly Automation, 2006
Purpose -Laser milling is a non-conventional layer-by-layer material removal technology suitable for machining a wide range of materials. This technology is particularly suitable to produce microstructures inside cavities, also obtained by other conventional processes, though with larger material removal rates, or for the direct development of microcavities not requiring high removal rates. This paper seeks to evaluate the capacity of laser milling for manufacturing of mould inserts. Design/methodology/approach -The paper examined several specific features of laser milling, important for the manufacturing of mould inserts, such as walls verticality, unselected illuminating areas, due to an incorrect STL removal volume definition, aspiration process and orientation, to prevent welding of re-solidified particles on the surface. Two mould inserts were produced too, assembled on a metallic mould frame and tested with different injection conditions. Findings -The findings suggest that laser milling is a suitable technology to produce small mould insert for injection moulding, though injection conditions are different as one moves from macroscopic to microscopic injected parts. New design guidelines must be undertaken jointly with the assessment of laser milling performance to make mould microcavities. One of the major difficulties of this process is to keep the side walls vertical plus the generation of undesirable machined volumes, due to unselected illuminating areas below the STL volume, corresponding to the volume to be removed, whenever laser milling is used to operate with structures previously machined. To prevent welding of re-solidified particles on the surface a proper aspiration must also be considered. Originality/value -The paper describes the benefits of laser milling technology.
3D Printing
Laser additive manufacturing is an advanced manufacturing process for making prototypes as well as functional parts directly from the three dimensional (3D) Computer-Aided Design (CAD) model of the part and the parts are built up adding materials layer after layer, until the part is competed. Of all the additive manufacturing process, laser additive manufacturing is more favoured because of the advantages that laser offers. Laser is characterized by collimated linear beam that can be accurately controlled. This chapter brings to light, the various laser additive manufacturing technologies such as: - selective laser sintering and melting, stereolithography and laser metal deposition. Each of these laser additive manufacturing technologies are described with their merits and demerits as well as their areas of applications. Properties of some of the parts produced through these processes are also reviewed in this chapter.
Journal of Nano- and Electronic Physics, 2016
In this work a method of obtaining a composite material based on small-dispersed particles is considered. Proposed method consists of two steps of separation, mechanical-rough separation and plasmasoft separation, and also of step of deposition a catalytic nanolayer by wet impregnation of separated particles in an aqueous solution of nickel nitrate. During such procedure a composite powder of small-dispersed zeolite particles with average diameter of 5 m and catalytic nickel layer was obtained. All obtained samples were studied on a Quanta 3D 200i scanning electron microscope. Microscopic analysis and obtained experimental results show, that increasing of dispersion of separated powder allows for increasing a mass of catalyst in the composite, and the used separation method in plasma for obtaining of particles with high dispersion do not erode a catalytic layer.

Loading Preview
Sorry, preview is currently unavailable. You can download the paper by clicking the button above.
References (8)
- 092,518 A * 5/1978 Merard .................... 219/121.69 5,206,496 A * 4/1993 Clement et al. ............... 250/271 5,313,193 A 5/1994 Dubois et al. 5,575,936 A * 1111996 Goldfarb .................. 219/121.68 5,604,635 A * 2/1997 Lawandy ...................... 359/620
- 5,637,244 A * 6/1997 Erokhin ................... 219/121.69 5,886,318 A * 3/1999 Vasiliev et al. .......... 219/121.69
- 6,333,486 Bl * 12/2001 Troitski ................... 219/121.69
- 6,537,479 Bl* 3/2003 Co lea ............................ 264/400 6,768,081 B2 7/2004 Troitski 2003/0093092
- Al * 5/2003 West et al. .................... 606/139 2003/0165680
- Al * 9/2003 Brady et al. .................. 428/402 2003/0224162
- Al * 12/2003 Hirai et al. .................... 428/402
- WO FOREIGN PATENT DOCUMENTS WO 2004113436 Al * 12/2004 OTHER PUBLICATIONS Qiu et al. Space-selective precipitation of metal nanoparticles inside glasses. Applied Physics Letters. vol. 81, No. 16. pp. 3040-3042. 2002 American Institute of Physics. Oct. 14, 2002.*