Pedram Yousefian

Pedram Yousefian
Pennsylvania State University | Penn State · Materials Research Institute

Ph.D. Student

About

8
Publications
3,556
Reads
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94
Citations
Citations since 2016
8 Research Items
94 Citations
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20162017201820192020202120220510152025
20162017201820192020202120220510152025

Publications

Publications (8)
Article
Full-text available
Base metal electrode (BME) multilayer ceramic capacitors (MLCCs) continue to advance with higher volumetric capacitance, higher voltage, and higher-temperature operational ranges with greater numbers of capacitors being manufactured and integrated into the electronic infrastructure of society. Many of these applications range from aerospace, transp...
Article
The processing science and fundamental understanding of defect chemistry of BaTiO3 is a model example of how material science is used to guide the materials engineering of capacitive devices. The fundamentals are discussed from the phase equilibria, defect chemistry, and the impact on intrinsic properties. We reviewed the phenomenological defect ch...
Article
The design of a new super-atmospheric pressure metal organic chemical vapor deposition (MOCVD) reactor with spatially separated source zones and rotating susceptor is proposed and analyzed using computational fluid dynamics (CFD) techniques to determine fluid transport phenomena and suitability for thin-film synthesis of group III nitrides. This Hi...
Chapter
This article presents a discussion of hot tear formation by first re-interpreting tensile test experimental results for aluminum castings in the literature. Based on the previous findings that a pore should first nucleate to result in a hot tear, the physics of pore formation is reviewed through theoretical fracture pressure calculations. Theoretic...
Article
Full-text available
Aluminum melts sustain damage to its quality when surface oxides are entrained into bulk liquid. To quantify the extent of entrainment damage, four castings were produced in reduced pressure test (RPT) apparatus; one machined out of the continuously cast ingot, and the other three by pouring the metal from a height of 25, 37.5, and 150 mm. Analyses...
Article
Full-text available
An in-depth discussion of pore formation is presented in this paper by first reinterpreting in situ observations reported in the literature as well as assumptions commonly made to model pore formation in aluminum castings. The physics of pore formation is reviewed through theoretical fracture pressure calculations based on classical nucleation theo...
Thesis
Full-text available
Aluminum alloy castings are being integrated increasingly into automotive and aerospace assemblies due to their extraordinary properties, especially high strength-to-density ratio. To produce high quality castings, it is necessary to understand the mechanisms of the formation of defects, specifically pores and inclusion, in aluminum. There have bee...

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Projects

Projects (2)
Project
Base metal electrode (BME) multilayer ceramic capacitors (MLCCs) continue to advance with higher volumetric capacitance, higher voltage, and higher-temperature operational ranges with greater numbers of capacitors being manufactured and integrated into the electronic infrastructure of society. Many of these applications range from aerospace, transport, computation, medical, satellite, military, and the internet of things means the interdependence of these devices require higher reliability at a collective and individual component level. Thus, determining the lifetime reliability of MLCCs is critical to provide more reliable components, and no weak links to the electrified infrastructure