April 2019 - Msepostdoc-list

FW: Carlos Gonzalez, Wed. May 1st, 1 pm MRGN 121 (DP), Purdue 150th Speaker
by Stacey, Lisa A 29 Apr '19

29 Apr '19

Forwarding on behalf of Kayla Burke, Discovery Park: ________________________________ Dear Colleagues, Please join us on Wednesday, May 1 at 1:00 p.m. at the Burton D. Morgan Center, room 121 to hear a Discovery Park and Purdue Quantum Science Engineering Institute sponsored seminar speaker, Dr. Carlos Gonzalez present the talk entitled, Effective Integration of NIST Reference Data, Reference Materials, and Informatics in Support of Science and Technology. Dr. Gonzalez is Chief of the Chemical Sciences Division, Material Measurements Laboratory at the National Institute of Standards and Technology. Dr. Gonzalez was the founder of the NIST's Center for Theoretical and Computational Nanosciences, which he directed for three years. Dr. Gonzalez has extensive experience in the development and implementation of modern ab initio quantum chemical methodologies and their application to a wide variety of chemical problems. Dr. Gonzalez's seminar will be part of Purdue University<https://www.facebook.com/PurdueUniversity/>'s 150th anniversary events. Our anniversary theme is "Giant Leaps," inspired by Neil Armstrong's historic statement on the moon and includes a yearlong Ideas Festival focused on topics that allow Boilermakers everywhere a chance to reflect on the past, embrace the present and look to the future that Boilermakers will be instrumental in creating. We hope to see you there! [cid:image002.png@01D4FE95.394BFB10] Kayla Kayla Burke Administrative Assistant I Discovery Park I MRGN 120C 1201 W. State Street, W. Lafayette, IN 47907-2057 Office: 765.496.6103 I Mobile: 765.426.8504 I kbowsher(a)purdue.edu<mailto:kbowsher@purdue.edu> [https://www.purdue.edu/brand/images/Purdue_University-150_Years_of_Giant_Le…] www.purdue.edu/giantleaps<http://www.purdue.edu/giantleaps> To schedule a tour Discovery Park click here<http://www.purdue.edu/discoverypark/about/visit/index.php>. Please allow at least 2 weeks advanced notice. *Follow us! Twitter: @DiscoveryParkPU<https://twitter.com/DiscoveryParkPU> Facebook: Discovery Park at Purdue University<https://www.facebook.com/DiscoveryParkPurdue/>

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Reminder: TODAY - 4/26/2019 MSE Seminar Speaker Professor Lihua Qian / ARMS 1028 - 10:30 am
by Coar, Stacey L 26 Apr '19

26 Apr '19

[cid:image002.png@01D4FC05.468BCC70] Stacey Stacey Coar Secretary/Development Assistant School of Materials Engineering Purdue University Neil Armstrong Hall of Engineering 701 West Stadium Ave. Room 2300 West Lafayette, IN 47907 765-494-4100 scoar(a)purdue.edu<mailto:scoar@purdue.edu>

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Seminar Reminder for Yang Wang's Preliminary Exam Friday, April 26, at 10:30 a.m., in HAMP G212. "MOCVD Growth of 1.8 eV Band Gap Zinc Oxide Materials for Solar Cell Applications"
by Son, Rosemary E 25 Apr '19

25 Apr '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "MOCVD Growth of 1.8 eV Band Gap Zinc Oxide Materials for Solar Cell Applications" By Yang Wang Purdue MSE Preliminary Exam Advisors: Professor Na Lu and Professor Haiyan Wang ABSTRACT Zinc oxide (ZnO) is of great research and application interest as a wide band-gap semiconductor in recent years. It has many desired properties for photovoltaic, thermoelectric and optoelectronic applications, such as large and direct bandgap, high exciton binding energy, earth abundancy, large Seebeck coefficient, high thermal stability, and availability of various nanostructures, nontoxic, etc. This thesis research aims to develop 1.8 eV bandgap semiconductor materials with earth-abundant element Zn using Metal Organic Chemical Vapor Deposition (MOCVD) method. These materials serve as topping layer of a multi-junction solar cell which is a combination of 1.8 eV wide bandgap Schottky solar cell on a 1.1eV band gap Si solar cell to reach high power conversion efficiency at relatively low cost using sustainable and non-toxic materials. Preliminary results show that Ni alloying can tune the bandgap of ZnO in relatively large range. The lowest bandgap achieved in as-grown NiZnO films is 2.0 eV and the band gap is further reduced to 1.83 eV after post annealing. It is expected that the outcome of the work will facilitate the fabrication and manufacture of low-cost wide band gap material with broad band gap tunability for solar cell and other applications. Date: Friday, April 26, 2019 Time: 10:30 A.M. Place: HAMP G212

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Seminar Notice for Walt Williams' Preliminary Exam. Seminar, Friday, May 3, at 9:00 a.m., in ARMS 1028 " Microstructural Evolution of U-Zr Nuclear Fuel Throughout Fabrication and Irradiation"
by Son, Rosemary E 25 Apr '19

25 Apr '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Microstructural Evolution of U-Zr Nuclear Fuel Throughout Fabrication and Irradiation" By Walter J. Williams Purdue MSE Preliminary Exam Advisor: Professor Maria A. Okuniewski ABSTRACT Advanced modeling and modern material science techniques are being coupled to help explain and predict how the microstructure, and thus the overall behavior, of U-Zr alloys will evolve during irradiation. Historically, the complexity of the operating environment and convolved phenomena have hindered fuel engineers from providing quantitative, mechanistic explanations and computational models desired for fuel design optimization decisions. Deployment of material science instruments and microstructural/performance modeling platforms capable of handling nuclear material has provided a pathway for a more detailed exploration into the fundamental phenomena that impacts bulk fuel behavior. Two microstructural phenomena, fuel swelling and thermally driven constituent redistribution, were identified as areas warranting further investigation. The scoping analysis suggested that the following parameters should be explored as driving forces for the phenomena of interest: temperature, composition, crystallographic texture, temperature gradient, fission density, and fission rate. Separate effects testing was chosen to deconvolve these driving forces and phenomena in order to further the fundamental understanding of fuel performance. In order to isolate these variables while remaining relevant to the regimes observed in pin type fast reactor fuels, a novel fabrication technique was utilized to create thin foils of various U-Zr alloys. The microstructure throughout fabrication was investigated through scanning electron microscopy, electron dispersive spectroscopy, and neutron diffraction in order to create an out-of-pile baseline for microstructural evolution. Date: Friday, May 3, 2019 Time: 9:00 A.M. Place: ARMS 1028

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Seminar Reminder for Brenden Hamilton's Preliminary Exam Seminar, Tomorrow, Thursday, April 25, at 10:30 a.m., in ARMS 3115. " Equilibrium Shock Approximation Methods and Their Applicability to Simulate Complex Shock Induced Phenomenon"
by Son, Rosemary E 24 Apr '19

24 Apr '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Equilibrium Shock Approximation Methods and Their Applicability to Simulate Complex Shock Induced Phenomenon" By Brenden W. Hamilton Purdue MSE Ph.D. Preliminary Exam Advisor: Professor Alejandro Strachan ABSTRACT The thermo-mechanical and chemical response of materials under shock loading conditions is an important area of research for metallurgy, energetic materials, chemistry, geoscience, and astrophysics. Both experimental and theoretical research has focused on the role of shock in inducing phenomenon such as plasticity, phase transformation, failure, and chemical reactions. Due to the ultrafast timescales of these phenomena, molecular dynamics (MD) simulations are widely used to study shock. However, non-equilibrium, direct shock simulations are limited by the achievable length and time scales, with many shock-induced phenomena occurring on longer timescales than are achievable. This work aims to compare two computational approaches to simulate a material under shock loading conditions behind the shock front: The Multi-Scale Shock Technique (MSST) and the Hugoniostat. The former is derived from an extended Lagrangian with a shock pressure determined from the Rankine-Hugoniot Jump Conditions, confining the system to states along the Rayleigh Line (single shock velocity). The latter approach employs coupled volume and heat flow equations of motion that dynamically compresses the system to a desired shock pressure while varying energy to conserve the jump conditions. Both methods will be compared using the underlying theory as well as with complex test cases. Simulations are conducted for the energetic material TATB to compare shock induced volume expanding reactions to Zel'dovich-von Neumann-Döring Theory (ZND). Additionally, shock induced densification of the highly porous metal-organic framework MOF5 will be studied and compared to non-equilibrium shock simulations. Date: Thursday, April 25, 2019 Time: 10:30 A.M. Place: ARMS 3115

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2 Seminars this Friday, Professor Lihua Qian and Dr. Voramon Dheeradhada
by Coar, Stacey L 24 Apr '19

24 Apr '19

[cid:image002.png@01D4FA72.3DF725D0] [cid:image001.png@01D4FA72.1BCCA840] Stacey Stacey Coar Secretary/Development Assistant School of Materials Engineering Purdue University Neil Armstrong Hall of Engineering 701 West Stadium Ave. Room 2300 West Lafayette, IN 47907 765-494-4100 scoar(a)purdue.edu<mailto:scoar@purdue.edu>

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REMINDER TODAY: MSE 690 Seminar Speaker - Don Brown, Ph.D., Monday, April 22, 2019/ARMS 1010 - 3:30
by Coar, Stacey L 22 Apr '19

22 Apr '19

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MSE 690 Seminar Speaker - Don Brown, Ph.D., Monday, April 22, 2019/ARMS 1010 - 3:30
by Coar, Stacey L 19 Apr '19

19 Apr '19

Please join us Monday, April 22nd, to see Don Brown from Los Alamos speak in MSE 690 at 3:45. Thank you, Stacey [cid:image002.png@01D4F68C.1E526E40]

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Seminar Notice for Yang Wang's Preliminary Exam Friday, April 26, at 10:30 a.m., in HAMP G212. "MOCVD Growth of 1.8 eV Band Gap Zinc Oxide Materials for Solar Cell Applications"
by Son, Rosemary E 19 Apr '19

19 Apr '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "MOCVD Growth of 1.8 eV Band Gap Zinc Oxide Materials for Solar Cell Applications" By Yang Wang Purdue MSE Preliminary Exam Advisors: Professor Na Lu and Professor Haiyan Wang ABSTRACT Zinc oxide (ZnO) is of great research and application interest as a wide band-gap semiconductor in recent years. It has many desired properties for photovoltaic, thermoelectric and optoelectronic applications, such as large and direct bandgap, high exciton binding energy, earth abundancy, large Seebeck coefficient, high thermal stability, and availability of various nanostructures, nontoxic, etc. This thesis research aims to develop 1.8 eV bandgap semiconductor materials with earth-abundant element Zn using Metal Organic Chemical Vapor Deposition (MOCVD) method. These materials serve as topping layer of a multi-junction solar cell which is a combination of 1.8 eV wide bandgap Schottky solar cell on a 1.1eV band gap Si solar cell to reach high power conversion efficiency at relatively low cost using sustainable and non-toxic materials. Preliminary results show that Ni alloying can tune the bandgap of ZnO in relatively large range. The lowest bandgap achieved in as-grown NiZnO films is 2.0 eV and the band gap is further reduced to 1.83 eV after post annealing. It is expected that the outcome of the work will facilitate the fabrication and manufacture of low-cost wide band gap material with broad band gap tunability for solar cell and other applications. Date: Friday, April 26, 2019 Time: 10:30 A.M. Place: HAMP G212

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Seminar Reminder for Kayla Yano's Ph.D. Final Exam. Seminar Thursday, April 18, at 9:00 a.m., in ARMS 3115. Exam same day in ARMS 2326, at 10:00 a.m. "In Situ TEM Mechanical Testing in Irradiated Oxide Dispersion Strengthened Alloys"
by Son, Rosemary E 17 Apr '19

17 Apr '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "In Situ TEM Mechanical Testing in Irradiated Oxide Dispersion Strengthened Alloys" By Kayla H. Yano Purdue MSE Ph.D. Final Exam Advisors: Professor Janelle P. Wharry and Professor Maria Okuniewski ABSTRACT The objective of this dissertation is to demonstrate the use of in situ TEM mechanical testing to find mechanical properties of as received, self-ion, and proton irradiated Fe-9%Cr ODS. The use of charged particle irradiation in the evaluation of nuclear reactor candidate materials requires the development of novel methods to assess mechanical properties in near-surface irradiation damage layers. Yet at such small micron or nanometer scales the mechanical properties can begin to be impacted by size-effects. In this work micropillar compression, cantilever bending, lamellae indentation, and clamped beam fracture testing is conducted on ion-irradiated Fe-9%Cr ODS to find yield stress, elastic modulus, flow stress, and fracture toughness. We find a threshold in sample dimension at which size-effects are observed that is directly related to obstacle spacing. By combining an understanding of the microstructure of irradiated Fe-9%Cr ODS and the in situ TEM technique, one can find the bulk-like mechanical properties of ion irradiated Fe-9%Cr ODS. Date: Thursday, April 18, 2019 Time: 9:00 A.M. Place: ARMS 3115

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