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  • Development of nickel aluminide (NiAl) microchannel array devices for high-temperature applications

    Creator:
    Kanlayasiri, Kannachai
    Abstract:
    The miniaturization of Microtechnology-based Energy, Chemical and Biological Systems (MECS) is made possible by the use of high aspect ratio microchannel arrays to increase the surface-area-to-volume ratio of the flow conduits within the devices, resulting in an improvement in the heat and mass transfer performance of the devices. However, advantages...
    Resource Type:
    Dissertation
    Full Text:
    applied to high-temperature applications (above 650 °C) due to lack of high-temperature MECS devices

  • Fabrication of precipitation-hardened aluminum microchannel cooling plates for adsorption-based hydrogen storage systems

    Creator:
    Pawar, Supriya V.
    Abstract:
    The need for clean and renewable fuel such as hydrogen is driven by a growing worldwide population and increasing air pollution from fossil fuels. One of the major barriers for the use of hydrogen in automotive industry is the storage of hydrogen. Physisorption is the most promising storage technique due...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Supriya V. Pawar, for the

  • Development of a passive micro-ball valve

    Creator:
    Wangwatcharakul, Worawut
    Abstract:
    A novel design, material, and fabrication method are presented to fabricate a passive micro-ball valve. Microvalves are critical components in microflow control devices used to control the fluid flows in microchannels. These microflow control devices can be integrated with microsensors to form micro analysis systems. Glass/silicon-based fabrication is complicated and...
    Resource Type:
    Masters Thesis
    Full Text:
    , glass and plastics. Therefore, adhesive- bonding techniques can be applied to a variety of materials

  • Application of controlled thermal expansion in diffusion bonding for the high-volume microlamination of MECS devices

    Creator:
    Pluess, Christoph
    Abstract:
    Diffusion bonding has been widely used within microlamination architectures for the fabrication of Micro Energy and Chemical Systems (MECS). MECS are microsystems with the ability to process bulk amounts of fluid within highly-parallel microchannel arrays capable of accelerated heat and mass transfer. Thus far, diffusion bonding of the microchannel arrays...
    Resource Type:
    Masters Thesis
    Full Text:
    diffusion and mobility of atoms in the lattice. When both pressure and heat are applied together, the

  • Mechanical characterization and modeling of solder joints for the secondary side reflow of large IC packages

    Creator:
    Yutzie, James D.
    Abstract:
    As the drive continues to reduce the size of Printed Wiring Assemblies (PWAs), improve performance of electronic assemblies, and reduce costs of these products, reliable secondary (bottom) side reflow operations must be developed. Attaching Surface Mount Technology (SMT) components to the secondary side of a Printed Circuit Board (PCB) is...
    Resource Type:
    Masters Thesis
    Full Text:
    are checked. 29 4. Pull Test Design of Experiment. Checks denote factors applied to particular

  • Development of self-registration features for the assembly of a microchannel hemodialyser

    Creator:
    Porter, Spencer D.
    Abstract:
    More than 1.2 million people worldwide require regular hemodialysis therapy to treat end stage renal failure. In the United States alone, there are 300,000 patients and the National Kidney Foundation predicts that this number will double in the next 10 years. Currently most dialysis patients receive treatment at a dialysis...
    Resource Type:
    Masters Thesis
    Full Text:
    coatings that will be applied to it. PC is capable of being sterilized with gamma irradiation and does

  • Novel architecture for entrapment of elastomeric membranes in microfluidic systems

    Creator:
    Blackwell, Edward P.
    Abstract:
    This thesis presents a novel microlamination architecture that enables the large scale integration of valves into low cost micro energy and chemical systems via membrane entrapment. Polycarbonate layers embossed with microfluidic channels were bonded by ultrasonic welding of raised embossed protrusions that penetrate though the PDMS membranes. The bonding pressure...
    Resource Type:
    Masters Thesis
    Full Text:
    completed this thesis CONTRIBUTION OF AUTHORS Brian K Paul assisted with the structure of the journal

  • Development of a radial microlamination architecture for cylindrical microchannel arrays

    Creator:
    Vlieg, James H.
    Abstract:
    Microchannel arrays are being developed across a wide spectrum of microfluidic applications including blood processing, fuel cells and thermal management among many others. Typical arrays are based on a flat laminated architecture produced in a vacuum hot press (VHP) through solid-state diffusion bonding. Due to the cylindrical nature of certain...
    Resource Type:
    Masters Thesis
    Full Text:
    significantly in function and fabrication methods. Analytical microfluidics is applied to batch analysis of

  • Sources of weld strength variability in capacitor discharge welding

    Creator:
    Benjarattananon, Jukchai
    Abstract:
    Capacitor discharge welding (CDW) is a rapid solidification joining process under the influence of one-dimensional thermal gradients. Although CDW is useful for joining small parts and dissimilar metals, CD welded joints have a large variability in weld strength. CDW is not widely accepted because of a lack of automated process...
    Resource Type:
    Masters Thesis
    Full Text:
    applied to stud welding (Venkataraman and Devletian, 1988). The CDW process can relieve the problem of

  • Development of an automated capacitor discharge welding system

    Creator:
    Patnaik, Srinivas M.
    Abstract:
    Automation of Capacitor Discharge Welding (CDW) has not been investigated in industry due to the limited understanding of the process. The US Department of Energy's Albany Research Center (ALRC) has done an extensive study of the process and reported applications of welds in the manufacture of electro-mechanical products such as...
    Resource Type:
    Masters Thesis
    Full Text:
    process was applied to the joining of silver contacts to brass brackets. The welded samples were