Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Electroforming"”.
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Electroforming of personalized miniature metal parts using additively manufactured molds
… additively manufactured molds to facilitate the electroforming of personalized metal parts. The methodology encompasses standardized mold design, experimental procedures for mold development and electroforming, and a simulation model for visualizing and predicting the deposition process. The …
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Electroforming and electron emission in metal-borosilicate glass-metal structures
… have been studied. Diode and triode systems show electroforming effects and subsequently electron emission, voltage-controlled negative resistance, electroluminescence, and switching phenomena. Previous work in this field is reviewed. By making certain modifications to the filamentary conduction …
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Studies of the electrical properties and electroforming of thin insulating films
… have been studied. These normally show electroforming effects and subsequently electron emission, electroluminescence, negative resistance and thermal-voltage memory effects. Previous work in the field is critically reviewed. It was shown that the time dependence of the device current …
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Photo-electroforming, a new manufacturing process for micro-electro-mechanical systems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Rapid tooling by integration of solid freedom fabrication and electrodepostion
… well as case studies reveal that integration of electroforming with solid freeform fabrication is a viable way for metal tool making. The major research tasks and results of this dissertation study are as follows: Rapid electroforming tooling (RET) process development and understanding. 3D CAD …
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Some electrical properties of thin films of polypropylene formed by vacuum evaporation
… having thicknesses less than 1000Å, showed electroforming effects and electron emission into vacuum under suitable conditions. The results were found to be consistent with a theory based on the generation of conducting filaments during the forming process. The increase in the a.c. …
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The replication of micron scale pillar arrays for medical ultrasound applications
… It demonstrates that the Bosch process and electroforming can be combined to produce a master with a deeper array structure than has been previously demonstrated by these two processes. Piezocomposites have also been made which have pillar widths that are not possible by dice and fill, by …
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Creating Complex Hollow Metal Geometries Using Additive Manufacturing and Metal Plating
… that combines selective laser sintering with an electroforming process to produce complex, hollow, metal geometries. The developed process uses electroless nickel plating on laser sintered parts that then undergo a flash burnout procedure to remove the polymer, leaving a complex, hollow, metal …
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Nonvolatile and Volatile Resistive Switching - Characterization, Modeling, Memristive Subcircuits
… switching in the metallic contact regime. The electroforming/SET and RESET processes have been simulated according to the mechanism of conductive filament formation and rupture and validated by experimental results. The Joule and Thomson heating effects have also been investigated for the RESET …
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Uv-liga Compatible Electroformed Nano-structured Materials For Micro Mechanical Systems
… UV light sensitive materials, mostly SU-8, and electroforming is performed to fabricate micro metallic structures defined by the micro molds. Therefore, UV-LIGA is a bottom-up in situ material-addition process. UV-LIGA has received broad attention recently than LIGA – a micro molding fabrication …
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Impact of Thermal Effects and Other Material Properties on the Performance and Electro-Thermal Reliability of Resistive Random Access Memory Arrays
… deposition effects like surface roughness on the electroforming voltages of ReRAM devices. The reference device structure considered in this work is Cu/TaOx/Pt, which has been compared with alternative configurations involving metals like Ru and Co as potential substitutes for Pt. Additionally, a …
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Investigating Ferroelastic and Piezoelectric Vibration Damping Behavior in Nickel-Barium Titanate and Nickel-PZT Composites
… using a combination of electroless plating and electroforming. The damping behavior of the composite was analyzed in terms of the damping mechanisms below Tc and the damping mechanisms above Tc of BaTiO3. Below Tc, vibration damping ability of the composite was highly influenced by ferroelastic …
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New ways to tune the multi-functionality of oxide thin films for memory applications
… for various memory applications. First, electroforming-free resistive switching (RS) with high ON/OFF ratio is realized in a novel model VAN system based on self-assembled Sm-doped CeO2 and SrTiO3 films that allow separate tailoring of nano-scale ionic and electronic channels at a high …
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Electrochemical materials for integrated magnetics
… images. With computational electrochemistry, the electroforming process of Cu VIAs is explored using the FEM in COMSOL Multiphysics to perform 2D and 3D time-dependent simulation studies. Simulations are then verified by comparison to experimental results, with highly positive correlation. Special …
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Understanding Ferroelastic Domain Reorientation as a Damping Mechanism in Ferroelectric Reinforced Metal Matrix Composites
Ferroelectric-reinforced metal matrix composites (FR-MMCs) offer the potential to improve damping characteristics of structural materials. Many structural materials are valued based on their stiffness and strength; however, stiff materials typically have limited inherent ability to dampen …
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There is a Silver Lining.
<p>I investigated two unique processes developed throughout this body of work. The first technique is the cracking and lifting of an electroformed layer from a core vessel form. The second process, that I named “crunch-raising”, is used to form vessels.</p> <p>General data is gathered through …