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Showing 1 to 20 of 38 for “"metal-ceramic"”.
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First-Principles Study of Metal -Ceramic Interfaces
… the inherent electronic structures of the bulk ceramics, our calculations reveal a trend in Wad with respect to the summed surface energies of the interfaced materials (sigmaAl + sigmaceramic). Specifically, we find that surfaces having larger sigma's adhere at interfaces more strongly than …
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First-Principles Study of Metal-Ceramic Interfaces
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-11-14T18:24:49Z No. of bitstreams: 1 Siegel_Donald.pdf: 7511521 bytes, checksum: 6f8fb323833d73f093cfa2ec9669d742 (MD5)
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High solid loading aqueous base metal/ceramic feedstock for injection molding
Increasing volume fraction of metal powder in feedstock provided lower shrinkage. Reduction of the shrinkage results in better dimensional precision. The rheology of the feedstock material plays an important role to allowing larger volume fractions of the metal powder to be incorporated in the …
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A Process for Manufacturing Metal-Ceramic Cellular Materials with Designed Mesostructure
… a manufacturing process that is able to create metal matrix composites with complex cellular geometries. The novel manufacturing method uses two distinct additive manufacturing processes: i) fabrication of patternless molds for cellular metal castings and ii) printing an advanced cellular …
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Numerical analysis of plastic deformation in metal-ceramic nanolayers during cyclic indentation
The indentation behavior of metal/ceramic nanolayered composites is studied nu- merically using the finite element method. Attention is devoted to cyclic response under fixed maximum and minimum loads, with the primary objective of examining the evolving plastic deformation in the ductile metal …
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Synthesis and development of boron nanotubes and metal/ceramic-carbon nanotube composites
… and scaled-up in-situ synthesis of high strength metal and ceramic-carbon nanotube (CNT) composites extending prior work in our group of iron-carbon nanotubes composites. Both laboratory scale and scaled up setups were developed and were successfully used in producing the uniformly nanotube filled …
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Cast Metal-Ceramic Composite Lattice Structures for Lightweight, Energy Absorbing, and Penetration Resistant Applications
… (AM) with a well-known understanding of the metalcasting process. We used AM to produce sand molds in different sizes and with additional features for various applications — these molds were then filled with molten metal. Current literature suggests that this when appropriately applied, this …
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The influence of alloy composition and interfacial segregants on the fracture and fatigue of metal/ceramic interfaces
The use of multi-layered composites in the aircraft, automotive, and electronics industries is becoming more common as performance requirements exceed the capabilities of homogeneous materials. As a result, the need to assess their failure is critical. Diffusion bonded joints, thermal-barrier and …
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Automatic modification of part geometries subject to manufacturing constraints using fuzzy logic
… complex, and tedious to compute. For instance, metal-ceramic brazing requires adjustments to the part geometry primarily to accommodate thermal expansion and to allow for the insertion of a narrow braze-filler gap. These adjustments depend on the particular geometry, material properties, and …
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Applying human-computer interaction methodologies to the development of computer-aided design software
… of a graphical user interface (GUI) for the metal-ceramic brazing process: First, a GUI for the metal-ceramic brazing process was designed and implemented. Subjects were then invited to test the GUI by performing a set of benchmark tasks. The results of these tests were analyzed, both to …
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Microstructural Observations of Laser-Sintered Specimens for Prosthodontic Applications
… restorations from a biocompatible Co-Cr base metal alloy. The objectives of this study were to obtain detailed information about dimensional accuracy available with laser sintering, along with the microstructure and Vickers hardness of the alloy.Methods: Representative maxillary coping and …
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An Overview of Body Armor and Single Plate Impact Dynamics
… has evolved into more complex and effective metal, ceramic, and composite structures. This paper lays the groundwork for experimental and modeling methods used to understand the effectiveness of new armor designs. Focusing on the first layer of modern body armor, the ”High Impedance” layer. …
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Microstructural studies of vapor-deposited nickel/ceramic composites
… research program examines fundamental aspects of metal/ceramic interactions through the analysis of model composites produced by plasma-assisted physical vapor deposition (ion plating) and consisting of thin ($<$1 micrometer) metallic films on a ceramic substrate. The two major aspects of this …
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Smart material composites for magnetic field and force sensors
… DC bias in current magnetoelectric composites, a metal – ceramic core-shell composite structure was investigated. Metal-ceramic composite particles were synthesized at room temperature and their magnetic properties were investigated. The particles constitute a core-shell structure where the core …
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Structure and properties of titanium nitride-strengthened microlaminate metal matrix composites
… of titanium nitride strengthened microlaminate metal matrix composites. Reactive ion plated titanium nitride (TiN) was deposited onto titanium, nickel, and aluminum foils which were subsequently hot pressed to form microlaminate composites. The TiN volume percent was varied and its effect upon …
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Thermodynamic modelling as applied to the development of TRIP-Matrix-Composite materials: The Fe–Mg–Mn–Ti–Zr–O system
… Center 799 describes a development of the metal-ceramic thermodynamic databases as applied to the design of the TRIP-Matrix-Composite materials. A wide range of theoretical and experimental investigations have been carried out in the relevant systems of Fe–Mg–Zr–O, Mg–Ti–Zr–O and …
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Structural and Thermal Properties of Ignition Resistant Coatings for Reusable Rocket Engines
… coating has been determined to be a three-phase metal-ceramic composite composed of nickel, cerium borate, and barium alumino-borate glass. These phases have been verified through thermodynamic modeling using FactSage. Thermal properties are similar to IN-718, while mechanical properties such as …
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Adhesion of Dental Ceramic to Ti6Al4V Alloy Fabricated by CAD/CAM Technologies // Адхезия на дентална керамика към сплав Ti6Al4V, произведена чрез CAD/CAM технологии
… the properties and adhesion of dental ceramics to Ti6Al4V alloy produced by modern CAD/CAM technologies: milling and selective laser melting (SLM). Conventional and standard methods are used to investigate the geometric characteristics, density and hardness, morphology and surface …
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An electrochemical study on the ionic conductivity of ceramic electrolyte La1-2SrxCo3-yMyO3-sigma oxide and its Pd/Ag compsites
… the electrochemical properties of the oxygen ceramic electrolytes of La1-xSrxCo1-yMyO3-d perovskite-type oxides that possess excellent electronic and oxygen anionic conductivity. Such mixed-conductivity is the essential property that the cathode material of solid oxide fuel cell (SOFC) and the …
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Polymer, Metal, and Ceramic Microtubes by Strain-driven Self-rolling
… was also explored as a template to fabricate metal, ceramic and metal/ceramic hybrid tube. In order to fabricate metallic and V bimetallic tube, the cross-linked polymer film is capped by metallic layer. After rolling, polymer template is removed by pyrolysis resulting in pure metal …
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