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- <p>Aluminum alloys -- Fracture<br />Manganese alloys -- Fracture<br />Silicon<br />Phosphorus</p> (1)
- <p>Tissue scaffolds<br />Glass in medicine<br />Bioactive compounds<br />Bone regeneration</p> (1)
- Atom probe tomography (1)
- Dynamic fracture toughness (1)
- Electronic waste -- Recycling<br />Electronic waste -- Environmental testing<br />Electronic apparatus and appliances -- Environmental aspects<br />Electronic waste -- Management<br />Polymers -- Recycling<br />Pyrolysis -- Environmental aspects<br />Leaching -- Environmental aspects (1)
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- High manganese and aluminum steel (1)
- Kappa carbide (1)
- Printed Circuit Boards (1)
- Solid oxide fuel cells -- Computer simulation<br />Solid oxide fuel cells -- Reliability<br />Solid oxide fuel cells -- Stability<br />Doped semiconductors -- Computer simulation<br />Voltammetry -- Computer simulation<br />Fuel cells -- Electrodes -- Computer simulation<br />Oxidation-reduction reaction<br />Polymeric composites (1)
- Solid oxide fuel cells<br />Fuel cells -- Analysis<br />Metallic oxides -- Microstructure<br />Composite materials (1)
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Articles 1 - 5 of 5
Full-Text Articles in Engineering
Bioactive Glass Scaffolds For The Regeneration Of Load-Bearing Bone, Xin Liu
Bioactive Glass Scaffolds For The Regeneration Of Load-Bearing Bone, Xin Liu
Doctoral Dissertations
"Biocompatible scaffolds that replicate the structure and function of bone would be ideal bone substitutes for structural bone loss, provided they have the requisite mechanical properties for reliable long-term loading. In this dissertation, strong porous scaffolds of silicate 13-93 bioactive glass, created with two different microstructures, were evaluated to determine their mechanical properties and their capacity to regenerate bone in a rat calvarial defect model. Scaffolds with an oriented microstructure of columnar pores were prepared by unidirectional freezing of camphene-based suspensions, followed by thermal annealing and sintering. By optimizing the freezing conditions, annealing time, and sintering temperature, constructs (porosity = …
Infiltrated Composite Electrodes For Solid Oxide Fuel Cells, Aligul Buyukaksoy
Infiltrated Composite Electrodes For Solid Oxide Fuel Cells, Aligul Buyukaksoy
Doctoral Dissertations
"Solid oxide fuel cells (SOFCs) are electrochemical devices which can convert chemical energy to electrical energy with efficiencies up to 60%. In order for SOFCs to be favorable energy conversion devices, the power obtained from a unit volume should be improved. This corresponds to minimized resistances from SOFC components (composite electrodes and electrolyte). Stability of the generated power is another important issue. Degradation of SOFCs with time due to microstructural processes or chemical reactions that occur at operating conditions; and due to reduction/oxidation cycles caused by the changes in the anode has been an important obstacle that has prevented the …
On The Effect Of Silicon And Phosphorus During The Precipitation Of Κ-Carbide In Fe-Mn-Al-C Alloys, Laura Bartlett
On The Effect Of Silicon And Phosphorus During The Precipitation Of Κ-Carbide In Fe-Mn-Al-C Alloys, Laura Bartlett
Doctoral Dissertations
"Implementation of lightweight high manganese and aluminum steels for use in high energy absorbing applications requires a detailed knowledge of how alloying additions and impurities affect age hardening and high strain rate fracture properties. Dynamic fracture toughness is an important design criterion but has not been reported previously in these alloys. In addition, previous studies have shown that silicon and phosphorus increased the strength and aged hardness; however, the mechanism was unknown. This research mainly focuses on the effect of silicon and phosphorus on the precipitation of Κ-carbide and alloy partitioning during aging. Short range ordering, SRO, of Fe-Al-C into …
Processing, Microstructural Evolution And Electrochemical Performance Relationships In Solid Oxide Fuel Cells, Ayhan Sarikaya
Processing, Microstructural Evolution And Electrochemical Performance Relationships In Solid Oxide Fuel Cells, Ayhan Sarikaya
Doctoral Dissertations
"The relationships between the processing parameters, microstructures and electrochemical performance of solid oxide fuel cell (SOFC) components were investigated. The operating regimes (i.e., reducing vs. oxidizing) as well as the elevated temperatures (e.g. 800°C) for their operation introduce several material challenges. Therefore, composite materials are employed to withstand operating conditions while providing sufficient electrochemical performance for fuel cell operation. Analyses on lanthanum-strontium manganite (LSM) - yttria stabilized zirconia (YSZ) compositions (45 vol%-55 vol%) by impedance spectroscopy demonstrated that two competing polarization mechanisms (i.e. charge-exchange and surface adsorption-diffusion of oxygen) limit performance. Optimization of microstructures resulted in total resistances as low …
Recycling Of Electronic Waste: Printed Wiring Boards, Alex Luyima
Recycling Of Electronic Waste: Printed Wiring Boards, Alex Luyima
Doctoral Dissertations
"Pyrolysis and leaching are the dominant techniques applied in the recycling of waste printed wiring boards (PWBs). Waste PWB pyrolysis is a highly polluting technology and produces brominated pyrolysis oils in addition to hydrogen bromide (HBr) gas. Moreover, leaching as a treatment process of waste PWBs is not well investigated. In this work, the pyrolysis of waste PWBs has been studied with the aim of reducing the amount of brominated oils and HBr gas evolved. The effects of powder inorganic chemicals (CaO, CaCO₃, Fe₂O₃, Al₂O₃, Y-Zeolite, and ZSM-5) additions on the pyrolysis of waste PWBs has been studied through experiments …