ICALEO 2008 Paper #801 (A Gas-free Powder Delivery System for 100% Deposition Efficiency in Direct Laser Deposition)
A Gas-free Powder Delivery System for 100% Deposition Efficiency in Direct Laser Deposition
Authors:
Wei Wang, The University of Manchester; Manchester Great Britain
Andrew Pinkerton, The University of Manchester; Manchester Great Britain
Lin Li, The University of Manchester; Manchester Great Britain
Presented at ICALEO 2008
Metal powder delivery systems have been used widely in direct laser deposition (DLD) processes. Most current commercial DLD systems use a gas to carry the metallic powders to the point of delivery through a feed tube and then a nozzle. The major drawback of this method is that wastage of the expensive powder is very high. Although powder recycling ...$28.00
ICALEO 2008 Paper #902 (Beam Intensity Profile Modulation for Even Surface Treatment: Finite Element Modelling and Optical Design)
Beam Intensity Profile Modulation for Even Surface Treatment: Finite Element Modelling and Optical Design
Authors:
Dan Wellburn, University of Liverpool; Liverpool Great Britain
Martin Sharp, University of Liverpool; Birkenhead Great Britain
William Steen, University of Liverpool; Liverpool Great Britain
Nick Ellis, ULO Optics Ltd; Stevenage Great Britain
Geoff Dearden, University of Liverpool; Liverpool Great Britain
Ken Watkins, University of Liverpool; Liverpool Great Britain
Presented at ICALEO 2008
Common laser surface treatment problems arise when using a Gaussian or Top-Hat beam intensity profile to attempt to create an eve...$28.00
ICALEO 2008 Paper #904 (Advancements in Laser Alloying of Aluminum)
Advancements in Laser Alloying of Aluminum
Authors:
Thomas Seefeld, Bias Bremer Institut F Angewandte Strahltechnik Gmbh; Bremen Germany
Knut Partes, Bias Bremer Institut F Angewandte Strahltechnik Gmbh; Bremen Germany
Presented at ICALEO 2008
Since aluminum alloys have very limited resistance to wear, the application of protective surface layers is mandatory to ensure both function and lifetime of aluminum components in many technical applications. Only a small number of effective surface engineering methods are available. Laser alloying using the blown powder method may be a potential candidate for many applications. This paper highlights two different approaches to overcom...$28.00
ICALEO 2008 Paper #908 (Laser Alloyed Al-Ni-Fe Coatings)
Laser Alloyed Al-Ni-Fe Coatings
Authors:
Retha Rossouw, National Metrology Institute of South Africa; Pretoria Southwest Africa
Sisa Pityana, CSIR National Laser Centre; Pretoria Southwest Africa
Presented at ICALEO 2008
The aim of this work was to produce crack-free thin surface layers consisting of binary (Al-Ni, Al-Fe) and ternary (Al-Ni-Fe) intermetallic phases by means of a high power laser beam. The laser surface alloying was carried out by melting Fe and Ni based powders on an aluminium substrate. The mixture of the Fe and Ni powders was varied in order to create Fe-rich and Ni-rich intermetallic phases. A Rofin 4.4 kW Nd: YAG laser was used for melting the powders and the s...$28.00
ICALEO 2008 Paper #M101 (Dicing of Hb-Led Devices Embedded in Copper Substrates)
Dicing of Hb-Led Devices Embedded in Copper Substrates
Authors:
Marie Di Marco, Synova Sa; Ecublens Switzerland
Alexandre Pauchard, Synova Sa; Ecublens Switzerland
Akos Spiegel, Synova Sa; Ecublens Switzerland
Bernold Richerzhagen, Synova Sa; Ecublens Switzerland
Notker U. Kling, Synova Usa; Fremont USA
Presented at ICALEO 2008
High-brightness light emitting diodes are often embedded into a heat sink layer, providing an efficient and inexpensive method of expending the surface area necessary to dissipate heat generated during operation. Copper, copper tungsten and Molybdenum layers offer high-performance thermal management due to high thermal ...$28.00
ICALEO 2008 Paper #M102 (Debris-free Laser Dicing for Multi-layered Mems)
Debris-free Laser Dicing for Multi-layered Mems
Authors:
Masayuki Fujita, Institute for Laser Technology; Suita Japan
Yusaku Izawa, Institute of Laser Engineering, Osaka University; Suita Japan
Yosuke Tsurumi, Institute of Laser Engineering, Osaka University; Suita Japan
Shuji Tanaka, Department of Nano-Mechanics, Tohoku University; Sendai Japan
Hideyuki Fukushi, Department of Nano-Mechanics, Tohoku University; Sendai Japan
Keiichi Sueda, Institute of Laser Engineering, Osaka University; Suita Japan
Yoshiki Nakata, Institute of Laser Engineering, Osaka University; Suita Japan
Noriaki Miyanaga, Institute of Laser Engineerin...$28.00
ICALEO 2008 Paper #M104 (Glass Drilling with Near Infrared Laser Radiation)
Glass Drilling with Near Infrared Laser Radiation
Authors:
F. Ziems, Laser Zentrum Hannover E.V.; Hannover Germany
L. Richter, Laser Zentrum Hannover E.V.; Hannover Germany
R. Kling, Laser Zentrum Hannover E.V.; Hannover Germany
A. Ostendorf, Laser Zentrum Hannover E.V.; Hannover Germany
Presented at ICALEO 2008
Today glass parts are used in many fields of application, e.g. architecture, automotive and technical glasses or electronics. This generates the need for bores with different diameters in various glass types and thicknesses. The conventional macroscopic process is mechanical, utilizes diamond tools, requires at least one tool for each diameter and ...$28.00
ICALEO 2008 Paper #M105 (Uv Laser Micromachining for the Electronics Industry (Invited Presentation - 40 Minutes))
Uv Laser Micromachining for the Electronics Industry (Invited Presentation - 40 Minutes)
Authors:
Jae-Hoon Lee, Korea Industry of Machinery & Materials; South Korea
Hyonkee Sohn, Korea Institute of Machinery & Materials; Daejeon South Korea
Dong-Sig Shin, Korea Institute of Machinery & Materials; Daejeon South Korea
Ji-Whan Noh, Korea Institute of Machinery & Materials; Daejeon South Korea
Nam-Sung Kim, Eo Technics; Anyang South Korea
Gi-Jung Nam, Jettech; Incheon-Si South Korea
Presented at ICALEO 2008
Ultraviolet laser micromachining has increasingly been applied to the electronics industry where precision machining of high-d...$28.00
ICALEO 2008 Paper #M106 (Spatter Reduction During Titanium Microdrilling Using Pulsed Fiber Laser)
Spatter Reduction During Titanium Microdrilling Using Pulsed Fiber Laser
Authors:
Barbara Previtali, Politecnico Di Milano; Milano Italy
Carlo Alberto Biffi, Politecnico Di Milano; Milan Italy
Presented at ICALEO 2008
The request of small features obtained by means of laser technology has been growing in several fields, such as micromechanical, microelectronic and biomedical ones. Commercially pure (c.p.) titanium and its alloys are very interesting materials in biomedical and aerospace applications, such as prostheses and engine turbine blades. However the high tendency of c.p. titanium to produce spatter and remelted material can be an impediment to the diffusion of laser machini...$28.00
ICALEO 2008 Paper #M107 (Measurement of Plasma and Shock-Wave Dynamics and Properties Inside Holes during Laser Drilling of Metals)
Measurement of Plasma and Shock-Wave Dynamics and Properties Inside Holes during Laser Drilling of Metals
Authors:
Ingomar Kelbassa, Lehrstuhl Fuer Lasertechnik, Rwth Aachen University; Aachen Germany
Kurt Walther, Lehrstuhl F Lasertechnik, Rwth Aachen; Aachen Germany
Martin Hermans, Lehrstuhl Fuer Lasertechnik, Rwth Aachen University; Aachen Germany
Michel Kaminsky, Lehrstuhl Fuer Lasertechnik, Rwth Aachen University; Aachen Germany
Mihael Brajdic, Lehrstuhl Fuer Lasertechnik, Rwth Aachen University; Aachen Germany
Presented at ICALEO 2008
Laser material processing is influenced by plasma formation and dynamics such as plasma shielding or ...$28.00