May 2019 - Msepostdoc-list

MSE Soft Materials Summer Research Symposium
by Davis, Chelsea S 29 Jul '20

29 Jul '20

All, The 7th Annual Soft Materials Summer Research Symposium will be held this summer on Tuesday mornings at 11am in ARMS 1028. This weekly symposium will feature one or two short research talks by graduate students early in their research careers here at Purdue. All are welcome to attend. The full summer schedule is attached to this email. Please feel free to share this announcement with any colleagues or students that you think might be interested in attending. We look forward to seeing you there. Sincerely, Prof. Chelsea Davis Chelsea Davis, Ph.D.<https://polymerinterfacialmechanics.com/> Assistant Professor School of Materials Engineering Purdue University Neil Armstrong Hall of Engineering Room 2229 701 West Stadium Drive West Lafayette, IN 47907 Tel: (765) 494-9216<tel:(765)%20494-9216> Fax: (765) 494-1204<tel:(765)%20494-1204> [https://www.purdue.edu/brand/images/Purdue_University-150_Years_of_Giant_Le…] www.purdue.edu/giantleaps

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Seminar Reminder for Han Wang's Ph.D. Final. Monday, at 1:00, in ARMS 1028. Exam same day, at 2:00, in ARMS 2237. "Strain-Engineered Bismuth-Based Oxide Thin Films for Multifunctionalities"
by Son, Rosemary E 31 May '19

31 May '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Strain-Engineered Bismuth-Based Oxide Thin Films for Multifunctionalities" By Han Wang Purdue MSE Ph.D. Final Exam Advisor: Professor Haiyan Wang ABSTRACT Multifunctional characteristics of Bismuth-based oxides offer great opportunities to design a variety of devices exploiting either a single functionality or the synergistic multifunctionalities. In the past decades, strain engineering of thin films arose as a solution for fabrication of novel structures with highly desired properties. In this thesis, strain engineering has been applied to Bismuth-based oxides to explore the strain effect on thin film structures and functionalities. BiFeO3 (BFO) servers as the first study platform, because of its strain-induced phase transition and the corresponding diverse polarization properties. The strain effect of SrRuO3 (SRO)-buffered substrates on ferroelectric and optical properties of BFO thin films has been investigated. A wide range of strain states have been achieved in BFO films. The ferroelectricity and bandgap have been effectively tuned even with partial strain relaxation. However, pure BFO suffers from high leakage current and large coercive field. To overcome these limitations, Sm-doped BFO (BSFO) systems emerged and has been used in controlling the microstructure and properties of BFO. Our detailed structure analysis proves the Sm doping amount in BSFO thin films can be tuned effectively via deposition temperature. Consequently, the Sm dopant influences phase formation of BSFO and the macroscopic ferroelectric properties. Another member in Bismuth-based oxide family, Bi2WO6 (BWO), has been selected as the base material for the design of the two-phase nanocomposites, because of its unique layered structure and ferroelectric property. To introduce ferromagnetic component into BWO, two methods have been explored. The first method incorporates Mn cations into the BWO matrix (BWMO), and the second method couples CoFe2O4 (CFO) as secondary phase with BWO to form a vertically aligned nanocomposite (VAN) system. Both systems exhibit robust ferromagnetic and ferroelectric response at room temperature and demonstrate their promise as room temperature multiferroics for future spintronics and memory applications. Date: Monday, June 3, 2019 Time: 1:00 P.M. Place: ARMS 1028

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Seminar Reminder: NOTE CHANGES for Vikrant Karra's Ph.D. Final Exam, Monday, June 3, at 9:00 a.m., in ARMS 1021. Final will follow at 10:00, in ARMS 2237. "CHARGED INTERFACES: EQUILIBRIUM PROPERTIES, PHASE TRANSITIONS, AND MICROSTRUCTURAL EVOLUTION"
by Son, Rosemary E 31 May '19

31 May '19

Please accept my apology for the mistake in room for the seminar and exam. It is in ARMS 1021 and the exam is in ARMS 2237. This is an important time and I did not mean to make a mistake. Please consider attending the following: MATERIALS ENGINEERING SEMINAR "CHARGED INTERFACES: EQUILIBRIUM PROPERTIES, PHASE TRANSITIONS, AND MICROSTRUCTURAL EVOLUTION" By S. Vikrant Karra Purdue MSE Ph.D. Final Exam Advisor: R. Edwin García ABSTRACT Surfaces and interfaces in ionic solids play a pivotal role in defining the transport properties and microstructural evolution in many of the existing and emerging material applications, including energy-related systems such as fuel cells, rechargeable batteries, as well as advanced electronics such as those found in semiconducting, ferroelectric, and piezotronic applications. Here, a variational framework has been developed to understand the effects of ionic species and point defects on the structural, electrochemical and chemomechanical stability of grain boundaries in polycrystalline ceramics. The theory predicts the equilibrium and phase transition conditions of charged interfaces, and quantifies the properties induced by the broad region of electrochemical and chemomechanical influence in front of a grain boundary capable of spanning anywhere from a few angstroms to entire grains. As an example application, the microstructural mechanisms leading to the onset of the flash during electric field assisted sintering were predicted, where the experimentally observed cascading charge flow, resulting in the onset of a flash event was rationalized. Also, the model was applied to describe the effects of grain boundary drag by the interfacially accumulated ionic species and charged defects during grain growth under electrical, chemical, mechanical, or structural driving forces. Finally, abnormal grain growth in ionic solids with an emphasis on the structural and electrochemical character of the grain boundaries was demonstrated. Here, two moving grain boundary types, highly mobile and immobile interfaces are identified, resulting in three grain size populations. Date: Monday, June 3, 2019 Time: 9:00 A.M. Place: ARMS 1028

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Seminar Notice for Vikrant Karra's Ph.D. Final Exam, Monday, June 3, at 9:00 a.m., in ARMS 1028. Final will follow at 10:00, in ARMS 2326. "CHARGED INTERFACES: EQUILIBRIUM PROPERTIES, PHASE TRANSITIONS, AND MICROSTRUCTURAL EVOLUTION"
by Son, Rosemary E 31 May '19

31 May '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "CHARGED INTERFACES: EQUILIBRIUM PROPERTIES, PHASE TRANSITIONS, AND MICROSTRUCTURAL EVOLUTION" By S. Vikrant Karra Purdue MSE Ph.D. Final Exam Advisor: R. Edwin García ABSTRACT Surfaces and interfaces in ionic solids play a pivotal role in defining the transport properties and microstructural evolution in many of the existing and emerging material applications, including energy-related systems such as fuel cells, rechargeable batteries, as well as advanced electronics such as those found in semiconducting, ferroelectric, and piezotronic applications. Here, a variational framework has been developed to understand the effects of ionic species and point defects on the structural, electrochemical and chemomechanical stability of grain boundaries in polycrystalline ceramics. The theory predicts the equilibrium and phase transition conditions of charged interfaces, and quantifies the properties induced by the broad region of electrochemical and chemomechanical influence in front of a grain boundary capable of spanning anywhere from a few angstroms to entire grains. As an example application, the microstructural mechanisms leading to the onset of the flash during electric field assisted sintering were predicted, where the experimentally observed cascading charge flow, resulting in the onset of a flash event was rationalized. Also, the model was applied to describe the effects of grain boundary drag by the interfacially accumulated ionic species and charged defects during grain growth under electrical, chemical, mechanical, or structural driving forces. Finally, abnormal grain growth in ionic solids with an emphasis on the structural and electrochemical character of the grain boundaries was demonstrated. Here, two moving grain boundary types, highly mobile and immobile interfaces are identified, resulting in three grain size populations. Date: Monday, June 3, 2019 Time: 9:00 A.M. Place: ARMS 1028

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Seminar Reminder for Qiang Li's Ph.D. Final Exam. Seminar, Monday, June 3, at 9:00 a.m., in ARMS 1028. Exam, same day, at 10:00, in ARMS 2326 " Fabrication, Plasticity, and Thermal Stability of Nanotwinned Al Alloys"
by Son, Rosemary E 30 May '19

30 May '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Fabrication, Plasticity, and Thermal Stability of Nanotwinned Al Alloys" By Qiang Li Purdue MSE Ph.D. Final Exam Advisor: Professor Xinghang Zhang ABSTRACT Lightweight Al alloys have widespread applications in transportation industry. Applications of Al alloys in harsh environments involving high stress and high temperatures are often hindered because of their inherently low strength and poor performance at high temperatures. The strongest commercial Al alloys have a maximum strength less than 700 MPa. Although ultrafine grained Al alloys prepared by severe plastic deformation have higher strength, they encounter grain growth at moderate temperatures (less than 200 °C). This thesis focuses on adopting transition metal solutes and non-equilibrium approach to fabricate high-strength, thermally stable nanotwinned Al alloys. To understand the underlying deformation mechanisms of nanotwinned Al alloys, in-situ micromechanical tests, high resolution and analytical transmission microscopy and atomistic simulations were used. Our studies show that nanotwinned supersaturated Al-Fe alloys have a maximum hardness and flow stress of ~ 5.5 GPa and 1.6 GPa, respectively. The apparent directionality of the vertical incoherent twin boundaries renders plastic anisotropy and compression-tension asymmetry in the nanotwinned Al-Fe alloys, revealed by systematic in-situ tensile and compressive micromechanical experiments conducted from both in-plane and out-of-plane directions. Moreover, the nanotwinned Al-Fe alloys experience no apparent softening when tested at 200 °C. When selectively incorporating with one additional solute as stabilizer, the ternary nanotwinned Al alloys can preserve an exceptionally high flow stress, exceeding 2 GPa, prior to precipitous softening at an annealing temperature of > 400 °C. The thesis offers a new perspective to the design of future strong, deformable and thermally stable nanostructured Al alloys. Date: Monday, June 3, 2019 Time: 9:00 A.M. Place: ARMS 1028

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Seminar Notice for Xing Sun's Ph.D. Final Exam. Seminar, Tuesday, June 11, at 9:00 a.m., in ARMS 1028; Exam same day, at 10:00 a.m., in ARMS 2326. " Controllable Three-Dimensional Strain, Microstructure, Functionalities in Self-Assembled Nanocomposite Th
by Son, Rosemary E 29 May '19

29 May '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Controllable Three-Dimensional Strain, Microstructure, Functionalities in Self-Assembled Nanocomposite Thin Films" By Xing Sun Purdue MSE Ph.D. Final Exam Advisor: Professor Haiyan Wang ABSTRACT Vertically aligned nanocomposite (VAN) configuration has been recognized as the state-of-the-art architecture in the complex oxide epitaxial thin films, which are constructed by two immiscible phases simultaneously and vertically growing on a given substrate and forming various columnar microstructures, such as nanopillars embedded in matrix, nanomaze, and nanocheckboard. Due to its architectural features, VAN structure enables a powerful control on the multifunctionalities via vertical strain engineering, microstructural variations, and interfacial coupling. It provides flexibility in complex oxide designs with various functionalities (e.g., electrical, magnetic, optical, etc.), as well as a platform to explore the correlations between strain, microstructure, and properties of thin films. In this dissertation, integrated VAN systems with multilayer configuration have been constructed as a new three-dimensional (3D) framework, e.g., inserting 1-3 layers of CeO2 (or LSMO) interlayers into the La0.7Sr0.3MnO3 (LSMO)-CeO2 VAN system and forming 3D interconnected CeO2 (or LSMO) skeleton embedded in LSMO matrix. This new VAN 3D framework enables both lateral and vertical strain engineering simultaneously within the films and obtains highly enhanced magnetotransport properties, such as the record high magnetoresistance (MR) value of ~51-66%, compared with its VAN single layer counterpart. In order to demonstrate the flexibility of this design, other systems such as 3D ZnO framework embedded in LSMO matrix have been constructed to explore the thickness effects of the ZnO interlayers on the magnetotransport properties of the LSMO-ZnO system. The maximum MR value is obtained at the ZnO interlayer thickness of ~2 nm, which enables the optimal magnetoresistance tunneling effect. Meanwhile, the significance of the interlayer selection in the microstructure and magnetotransport properties in the LSMO-ZnO system has been investigated by varying the interlayer materials yttria-stabilized zirconia (YSZ), CeO2, SrTiO3, BaTiO3, and MgO. The formed 3D heterogeneous framework provides a new dimension to tailor the microstructure, strain and functionalities within the films. Moreover, a new strain engineering approach with engineered tilted interfaces has been demonstrated by multilayering different VAN layers with various two phase ratio and creating a hybrid nanodumbbell structure within the LSMO-CeO2 VAN thin films. The nanodumbbell structure accomplishes a more efficient strain engineering and exhibits highly enhanced magnetic and magnetoresistance properties, compared with its VAN single layer and interlayer counterparts. These examples presented in the thesis demonstrate the flexibility and potential of 3D strain engineering in complex VAN systems and a higher level of property control, coupled with unique microstructures and interfaces. Beyond perovskites, these 3D designs can be extended to other material systems for a broad range of applications, such as energy conversion and storage devices. Date: Tuesday, June 11, 2019 Time: 9:00 A.M. Place: ARMS 1028

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Reminder Today: Guest Seminar speaker Dr. Darren Mollot - Department of Energy, Wednesday, May 29th, 2019/ ARMS 1010 /10:00am
by Coar, Stacey L 29 May '19

29 May '19

[X] 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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Guest Seminar speaker Dr. Darren Mollot - Department of Energy, Wednesday, May 29th, 2019/ ARMS 1010 /10:00am
by Coar, Stacey L 28 May '19

28 May '19

[cid:image001.png@01D5155A.2AE442E0] 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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FW: NOTICE - LAF C.40.10449 Fiber Network Update - Group 1 Risers (5/28/19 – 8/2/19)
by Stacey, Lisa A 28 May '19

28 May '19

Please see NOTICE below with additional information included for any issues. Thank you, Lisa Stacey Administrative Assistant to Department Head Purdue University School of Materials Engineering Neil Armstrong Hall of Engineering 765/494-4095 staceyl(a)purdue.edu [https://www.purdue.edu/brand/images/Purdue_University-150_Years_of_Giant_Le…] From: Qualio, Phillip H <pqualio(a)purdue.edu> Sent: Friday, May 24, 2019 2:42 PM To: Sondgerath, William J <wsondgerath(a)purdue.edu>; Shih, Tom I-P. <tomshih(a)purdue.edu>; Sherwood, Audrey H <asherwo(a)purdue.edu>; Bahr, David F <dfbahr(a)purdue.edu>; Stacey, Lisa A <staceyl(a)purdue.edu>; Coar, Stacey L <scoar(a)purdue.edu>; Riley, Donna M <riley(a)purdue.edu>; Hays, Cindey A <isenberg(a)purdue.edu>; Oakes, William C. <oakes(a)purdue.edu>; Brown, Pamela R <pamb(a)purdue.edu>; Holloway, Elizabeth M <holloway(a)purdue.edu>; Mikels, Dawn J <djmikels(a)purdue.edu>; Gleghorn, Virginia L <vboothgl(a)purdue.edu>; Dickerson, Darryl A <ddickerson(a)purdue.edu>; Bowker, David T <dbowker(a)purdue.edu>; Elias, Lindsay M <lindsaye(a)purdue.edu>; ARMS Business Office <eboarms(a)purdue.edu> Cc: Reehling, Ronald E Jr <rereehling(a)purdue.edu>; Ticen, Kerry L <kticen(a)purdue.edu> Subject: FW: NOTICE - LAF C.40.10449 Fiber Network Update - Group 1 Risers (5/28/19 – 8/2/19) The following NOTICE from Physical Facilities is in regard to a campus-wide project taking place May 28th to August 2nd, 2019. As indicated in red, no disruptions to the existing ITaP network are expected unless scheduled ahead of time. Full details can be found below. Thanks, Phil Qualio Building Deputy Neil Armstrong Hall of Engineering Potter Engineering Center (765) 496-9757 Report a Maintenance Issue<https://www.purdue.edu/fix-it/> From: Reehling, Ronald E Jr <rereehling(a)purdue.edu<mailto:rereehling@purdue.edu>> Sent: Thursday, May 23, 2019 2:46 PM Subject: NOTICE - LAF C.40.10449 Fiber Network Update - Group 1 Risers (5/28/19 – 8/2/19) To: Building Deputies (Please distribute to: Department Heads, Directors) Zone Leaders From: Ron Reehling, Construction Project Manager, Senior Capital Program Management Re: LAF C.40.10449 Multiple Buildings Network Fiber Installation – Group 1 Risers (5/28/19 – 8/2/19) This notification is to inform building occupants about the Multiple Buildings Network Fiber Installation project work occurring within your building from approximately May 28th-August 2nd, 2019. It is imperative that this notification be shared with all Departmental Staff within each building. PROJECT SCOPE: * This project will reinforce fiber cabling to telecommunications rooms in the building. Work will occur in the hallways as cabling is pulled to the telecommunication rooms. Cable terminations will occur inside the telecommunications rooms. IMPORTANCE OF THIS NOTIFICATION: * The fiber installation should cause no interruption on the existing ITaP network. Temporary outages to connect network switches to the new fiber will be scheduled by ITaP and announced ahead of time. It is strongly encouraged that this notification be shared with all Departmental Staff. * In the event of some unforeseen issue that may or may not be caused by this project, this notification provides a chain of command (see below) to follow in order to inform the appropriate personnel at the time of an incident. CHAIN OF COMMAND: * In the event of some unforeseen issue believed to be caused by the project construction, the person with the issue needs to immediately telephone the following personnel. It is imperative that the person with the issue speaks with someone directly; meaning that if the Building Deputy does not answer, immediately call the Project Manager, and so on. Notification of issues must be relayed immediately to ensure the health and safety of all building occupants. * Please notify the following personnel in order from #1-#5. Continue the notification process until someone is reached directly. In the event that the Purdue Police are notified, they will continue to call the Building Deputy, Project Manager, and REM until someone is reached. * Phil Qualio or Kerry Ticen, Building Deputy/Facility Manager: 765-496-9757 or 765-494-3871 * Ron Reehling, PF Construction Project Manager: 317-504-5539 * Jim Slopsema, ITaP Network Project Manager: 765-496-0508 * Kevin Thedans or David Petros, REM: 765-496-1937 or 765-494-1019 * Purdue Police Dispatch: 765-494-8221 NON-EMERGENCY ISSUES/QUESTIONS: At any time during construction, please feel free in contacting me with questions or concerns regarding the project. Ronald E. Reehling, Jr. P.E. Construction Project Manager, Senior Physical Facilities, Capital Program Management Purdue Technology Center Aerospace (PTCA) 1801 Newman Rd. Ste. 208 West Lafayette, IN 47906-4510 765-496-6379 / rereehling(a)purdue.edu

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Wednesday, May 22 beginning at 11:30 a.m. Staff out for the day
by Son, Rosemary E 21 May '19

21 May '19

Hi All, Just wanted you all to know that it is Spring Fling tomorrow beginning at 11:30. If you need any assistance, please ask before 11:30 a.m., tomorrow, Wednesday, May 22. Sincerely, MSE Staff

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