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Full-Text Articles in Engineering
Milled Carbon Fiber Reinforced Polymer Composition, Brian Massengale, Paul Schauer, Charles Dahle, Barry Gregerson, Bonnie Bachman, Thomas Oesterle
Milled Carbon Fiber Reinforced Polymer Composition, Brian Massengale, Paul Schauer, Charles Dahle, Barry Gregerson, Bonnie Bachman, Thomas Oesterle
Economics Faculty Research & Creative Works
A milled carbon fiber reinforced polymer having increased abrasion resistive characteristics. The reinforced polymer comprises a base resin selected from the group consisting of polyolefins and polyamides. The base resin is combined with an amount of milled carbon fibers and further may be combined with polytetrafluoroethylene. The resulting composite materials have excellent friction and wear characteristics and are useful in the production of injection molded parts. The molded parts have a high impact strength, exhibit dimensional stability, are abrasion resistive, and are static dissipative, with the composite materials having particular utility as support fixtures for semiconductors during certain processing operations.
Increased Radiative Lifetime Of Rare Earth-Doped Zinc Oxyhalide Tellurite Glasses, David L. Sidebottom, Michael A. Hruschka, B. G. Potter, Richard K. Brow
Increased Radiative Lifetime Of Rare Earth-Doped Zinc Oxyhalide Tellurite Glasses, David L. Sidebottom, Michael A. Hruschka, B. G. Potter, Richard K. Brow
Materials Science and Engineering Faculty Research & Creative Works
We have investigated the structural and optical properties of rare earth-doped zinc tellurite glasses modified by the substitution of ZnF2. Raman and phonon sideband spectroscopies were employed to characterize changes in the glass structure as well as to probe vibrational behavior in the immediate vicinity of the rare earth ion. These measurements are combined with photoluminescence and optical absorption to monitor the effect of halide substitution upon the optical behavior of the rare earth dopant. A substantial increase in the intrinsic radiative lifetime of Nd3+ is observed with increasing halide concentration.
Optically Transparent Composite Material And Process For Preparing Same, D. E. Day, James O. Stoffer, John M. Barr
Optically Transparent Composite Material And Process For Preparing Same, D. E. Day, James O. Stoffer, John M. Barr
Materials Science and Engineering Faculty Research & Creative Works
Glass ribbon-reinforced transparent polymer composites which provide excellent optical transparency and a low distortion level over a wide temperature range while exhibiting superior mechanical properties as compared to non- reinforced polymer counterparts, and equivalent properties as compared to glass fiber-reinforced counterparts.
Strip Casting With Fluxing Agent Applied To Casting Roll, Robert S. Williams, Ronald J. O'Malley, Richard C. Sussman
Strip Casting With Fluxing Agent Applied To Casting Roll, Robert S. Williams, Ronald J. O'Malley, Richard C. Sussman
Materials Science and Engineering Faculty Research & Creative Works
A strip caster (10) for producing a continuous strip (24) includes a tundish (12) for containing a melt (14), a pair of horizontally disposed water cooled casting rolls (22) and devices (29) for electrostatically coating the outer peripheral chill surfaces (44) of the casting rolls with a powder flux material (56). The casting rolls are juxtaposed relative to one another for forming a pouting basin (18) for receiving the melt through a teeming tube (16) thereby establishing a meniscus (20) between the rolls for forming the strip. The melt is protected from the outside air by a non-oxidizing gas passed …
Aluminum Nitride-Compatible Thick-Film Binder Glass And Thick-Film Paste Composition, Douglas M. Mattox
Aluminum Nitride-Compatible Thick-Film Binder Glass And Thick-Film Paste Composition, Douglas M. Mattox
Materials Science and Engineering Faculty Research & Creative Works
Mixed alkaline earth boroaluminate glasses comprising BaO combined with at least one of CaO, SrO and MgO. The glasses are useful as frit binders in aluminum nitride- compatible, thick-film paste compositions used in thick-film printing of hybrid microelectronic circuits on aluminum nitride substrates.
Spin Dynamics Of Er³⁺ In Erba₂Cu₃O7-Δ, Suntharalingam Skanthakumar, Jeffrey W. Lynn, Fatih Dogan
Spin Dynamics Of Er³⁺ In Erba₂Cu₃O7-Δ, Suntharalingam Skanthakumar, Jeffrey W. Lynn, Fatih Dogan
Materials Science and Engineering Faculty Research & Creative Works
Neutron scattering techniques are used to study the magnetic excitations of the Er ions in superconducting ErBa2Cu3O7, a system where the Er ions order antiferromagnetically at TN=0.62 K and the sublattice magnetization obeys the relation for a 2D S=1/2 Ising model. Our data, which were taken on a cold neutron triple axis spectrometer using a horizontally focusing analyzer, reveal that there is a large gap of about 0.20 meV in the excitation spectrum, about four times the thermal energy kTN, as expected for an Ising system. However, we also observe …
Scaling Parallels In The Non-Debye Dielectric Relaxation Of Ionic Glasses And Dipolar Supercooled Liquids, David L. Sidebottom, Peter F. Green, Richard K. Brow
Scaling Parallels In The Non-Debye Dielectric Relaxation Of Ionic Glasses And Dipolar Supercooled Liquids, David L. Sidebottom, Peter F. Green, Richard K. Brow
Materials Science and Engineering Faculty Research & Creative Works
We compare the dielectric response of ionic glasses and dipolar liquids near the glass transition. Our work is divided into two parts. In the first section we examine ionic glasses and the two prominent approaches to analyzing the dielectric response. The conductivity of ion-conducting glasses displays a power law dispersion σ(ω)∞ωn, where n≈0.67, but frequently the dielectric response is analyzed using the electrical modulus M*(ω) = 1/ε*(ω), where ε*(ω) = ε(ω) - iσ(ω)/ω is the complex permittivity. We reexamine two specific examples where the shape of M*(ω) changes in response to changes in (a) temperature and (b) ion concentration, to …