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  • ICALEO 2005 Paper #M605 (Laser Fabricated Porous Coating on NiTi Shape Memory Alloy)

    Laser Fabricated Porous Coating on NiTi Shape Memory Alloy
    Authors:
    Hau Chung Man, Laser Processing Group, Advanced Manufacturing Technology Research Centre; Kowloon Hong Kong
    Presented at ICALEO 2005

    Laser surface alloying technique was applied to syntheses a porous coating on NiTi shape memory alloy. The pores are uniformly distributed and are interconnected with each other in the coating. An average pore size of less than 10 micron was achieved. The porous coating is metallurgically bonded to the substrate NiTi alloy. The microstructure and corrosion properties of the coating will be discussed and compared with that of the laser gas nitrided layer. The possibility of applying the alloy with ...

    $28.00

  • ICALEO 2005 Paper #M604 (Laser Surface Texturing of Ti-6Al-4V and Controlled Oxide Formation for Improving Biocompatibility)

    Laser Surface Texturing of Ti-6Al-4V and Controlled Oxide Formation for Improving Biocompatibility
    Authors:
    Nazanin Mirhosseini, The University of Manchester; Manchester UK
    Marc Schmidt, The University of Manchester; Manchester UK
    Philip Crouse, The University of Manchester; Manchester UK
    Lin Li, The University of Manchester; Manchester UK
    Mustapha Soufian, Gesco; Manchester UK
    Presented at ICALEO 2005

    This paper reports the results of surface modification of Ti-6Al-4V using a 75 W Q-switched Nd:YAG ( ?=1064 nm, t=100 ns) laser in air with the ultimate aim of improving osseointegration and biocompatibility. Melting and rapid re-solidification ...

    $28.00

  • ICALEO 2005 Paper #M603 (Controlled Laser Cleaning of Artworks via Low Resolution LIBS and Linear Correlation Analysis)

    Controlled Laser Cleaning of Artworks via Low Resolution LIBS and Linear Correlation Analysis
    Authors:
    Marco Lentjes, Laser Centre University of Applied Sciences Muenster; Steinfurt Germany
    Johan Meijer, Engineering Technology University of Twente; Enschede The Netherlands
    Klaus Dickmann, Laser Centre University of Applied Sciences Muenster; Steinfurt Germany
    Presented at ICALEO 2005

    Based on a fibre optic miniature spectrometer (spectral range 200-1100 nm, lambda-resolution 2 nm) we have build up a LIBS-system for online monitoring during laser cleaning of artworks. In contrast to common LIBS set-ups with ICCDs our system offers less sensitivity and lambda-resolution....

    $28.00

  • ICALEO 2005 Paper #M602 (Effect of Pulse Parameters on Laser Cleaning of Copper Oxides)

    Effect of Pulse Parameters on Laser Cleaning of Copper Oxides
    Authors:
    Jie Zhang, Columbia University; New York NY USA
    Youneng Wang, Columbia University; New York NY USA
    Peng Cheng, Columbia University; New York NY -
    Y. Lawrence Yao, Columbia University; New York NY USA
    Presented at ICALEO 2005

    Under single-pulse and multi-pulse modes, the characteristics of copper oxides removal are comparably investigated. A two-dimensional model is utilized to numerically simulate the laser removal process and assist the investigation. In the model, property discontinuity and Stephan and kinetic boundary condition are taken into account, and the moving phase-interface ...

    $28.00

  • ICALEO 2005 Paper #M601 (Nd:YAG Laser Surface Treatment of Coating on Polyimide Substrate)

    Nd:YAG Laser Surface Treatment of Coating on Polyimide Substrate
    Authors:
    Zhaoxu Tian, University of Central Florida; Orlando FL USA
    Aravinda Kar, University of Central Florida; Orlando FL USA
    Presented at ICALEO 2005

    The objective of this work is to improve the surface properties of coatings on polymeric substrates by laser surface treatment. The coating can be deposited by different techniques such as physical vapor deposition, conventional chemical vapor deposition, laser chemical vapor deposition and low temperature thermal spray. The polymeric substrates can be laser-treated first to create a regular, roll-like texture and carbon-rich laser-modified surface to improve the subs...

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  • ICALEO 2005 Paper #M504 (Analysis of Microspike Array Formation on Tungsten Surface with Femtosecond Laser)

    Analysis of Microspike Array Formation on Tungsten Surface with Femtosecond Laser
    Authors:
    Etsuji Ohmura, Osaka University; Suita Osaka Japan
    Yasumitsu Nomura, Osaka University; Suita Osaka Japan
    Hiroyuki Hayashi, Osaka University; Suita Osaka Japan
    Tomokazu Sano, Osaka University; Suita Osaka Japan
    Yoshinori Hirata, Osaka University; Suita Osaka Japan
    Presented at ICALEO 2005

    Microspike array can be formed on a tungsten surface by irradiating a femtosecond laser through a very small aperture whose distance from the surface is order of the aperture size. Laser diffracts through the aperture. Therefore we analyzed the intensity distributions ...

    $28.00

  • ICALEO 2005 Paper #M502 (Measuring UV?Laser in Focus within a Few Seconds - Basic for Laser Micro Manufacturing)

    Measuring UV?Laser in Focus within a Few Seconds - Basic for Laser Micro Manufacturing
    Authors:
    Harald Schwede, PRIMES GmbH; Pfungstadt Germany
    Otto Maerten, MOC; Dreieich Germany
    Reinhard Kramer, PRIMES GmbH; Pfungstadt Germany
    Stefan Wolf, PRIMES GmbH; Pfungstadt Germany
    Volker Brandl, PRIMES GmbH; Pfungstadt Germany
    Presented at ICALEO 2005

    Micro machining with the laser requires very small spots. The focus is often in the range of below 10 micron. With standard beam diagnostic systems it is difficult to observe this tool of the processing. Often these processes are designed to operate in the UV. Standard CCD camera systems are only opt...

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  • ICALEO 2005 Paper #M501 (Characteristics and Dynamics of Magnetic-Confined Laser-Induced Silicon Plasmas in Atmosphere)

    Characteristics and Dynamics of Magnetic-Confined Laser-Induced Silicon Plasmas in Atmosphere
    Authors:
    Y.X. Han, University of Nebraska-Lincoln; Lincoln NE USA
    Yongfeng Lu, University of Nebraska-Lincoln; Lincoln NE USA
    T. Gebre, University of Nebraska-Lincoln; Lincoln NE USA
    Presented at ICALEO 2005

    The characteristics and dynamics of laser-induced silicon plasmas under the confinement of magnetic field with different intensities in atmosphere have been investigated. A strong magnetic field up to 1.05 Tesla was produced by two permanent magnets. A KrF excimer laser with a wavelength of 248 nm and a pulse width of 23 ns was used to produce plasmas which expanded across...

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  • ICALEO 2005 Paper #M410 (Microprocessing of Various Materials Using Femtosecond Laser Pulses)

    Microprocessing of Various Materials Using Femtosecond Laser Pulses
    Authors:
    Udo Loeschner, University of Applied Sciences; Mittweida Germany
    Andy Engel, University of Applied Sciences; Mittweida Germany
    Steffen Weissmantel, University of Applied Sciences; Mittweida Germany
    Guenter Reisse, University of Applied Sciences; Mittweida Germany
    Presented at ICALEO 2005

    Comprehensive results on femtosecond-laser microstructuring obtained at the laser institute of the University of Applied Sciences Mittweida will be presented. In our In-vestigations we used a femtosecond-laser micromachining station FS150-10 from the 3D Micromac AG Chemnitz equipped with a Ti: Sap...

    $28.00

  • ICALEO 2005 Paper #M409 (High Rep Rate Picosecond Laser Materials Processing)

    High Rep Rate Picosecond Laser Materials Processing
    Authors:
    Chuck Ratermann, RPMC; O'Fallon MO USA
    Bernhard Klimt, Lumera Laser; O'Fallon MO USA
    Thomas Herrmann, Lumera Laser; O'Fallon MO USA
    Presented at ICALEO 2005

    Cold ablation of steel, aluminum, nickel, tungsten carbide, titanium, copper, silicon, Teflon, glass, diamond, ceramics, and other materials will be surveyed with an emphasis on the speed of the processing, the heat affected zone, and the recast. An overview of the methods and tools employed will be presented. This will include results from a 100 kHz laser and from a 500 kHz laser.

    $28.00

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