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Preliminary Exam Seminar for Robert Appleton Friday, January 7, 2022 at 2:00pm via WebEx
by Contreras, Joshua Andres 03 Jan '22

03 Jan '22

Please consider attending this seminar: MATERIALS ENGINEERING SEMINAR "MOLECULAR AND ATOMIC FEATURIZATION METHODS FOR PREDICTIVE MODEL DESIGN" By Robert Appleton Purdue MSE Preliminary Exam Advisor: Professor Alejandro Strachan ABSTRACT Materials and molecular sciences have been concerned with the way chemical and structural information is represented when passed to a model for a number of decades. This has resulted in a large variety of options when it comes to representing atomic systems. Therefore, it can be challenging to optimize the representation and resulting descriptors for a specific application. Methods for dimensionality reduction and feature selection have been developed to aid researchers in this area. This review discusses the history of the representations that have been proposed and how they have been applied, as well as a demonstration of how dimensionality reduction and feature selection can be utilized to optimize the inputs for a given model. Date: Friday, January 7, 2022 Time: 2:00pm Place: Discovery Learning Research Center (DLRC) Room 131 or WebEx link: https://purdue.webex.com/meet/strachan?_ga=2.116695814.1424719606.163850306… [cid:image001.png@01D800AE.AC7025D0] Josh Contreras Administrative Assistant School of Materials Engineering Neil Armstrong Hall of Engineering Office: 765-494-4100 [3749DD84]<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.purdue.edu_-3Futm-…>

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REMINDER: Preliminary Exam Seminar for Venkat Kasi on Friday, January 7, 2022; 12:00pm(noon)
by Contreras, Joshua Andres 22 Dec '21

22 Dec '21

Please consider attending this seminar: MATERIALS ENGINEERING SEMINAR "Cold Atmospheric Plasma (CAP)-Assisted Surface Modification and Functional Materials Deposition for Flexible Electronic Devices" By Venkat Kasi Purdue MSE Preliminary Exam Advisor: Professor Rahim Rahimi ABSTRACT Functional thin films consisting of inorganic, organic, or hybrid materials are considered the backbone of electronic devices for many different applications ranging from flexible displays to sensors. The use of additive manufacturing for the fabrication of flexible electronics has significantly increased over the last few decades. Compared to the traditional subtractive etching and photolithography processes, the manufacturing process of flexible electronics through additive manufacturing offers many benefits including faster time to market through rapid prototyping, aptness to on-demand and small batch fabrication, roll-to-roll manufacturing, significant reduction in waste generation, and elimination of complex vacuum systems. However, the use of traditional additive manufacturing techniques such as screen printing, inkjet printing, and gravure printing is also limited by the requirement of solvent processable inks for the deposition of functional coatings. Cold atmospheric plasma chemical vapor deposition (CAP-CVD) has become an attractive additive manufacturing technology to synthesize and deposit different organic and inorganic materials directly onto the desired substrate under atmospheric conditions. In this work, we investigate for the first time the possibility of using CAP-CVD as an alternative approach to deposit functional materials for flexible electronic applications under atmospheric conditions. Also, as part of this investigation, we have addressed one of the key challenges in the field of electrochemical sensors, which is the water layer formation at the interface due to weak bonding between ion-selective membrane and the electrode causing potential drift and inconsistency in potential responses. Date: Friday, January 7, 2022 Time: 12:00pm(noon) Place: https://purdue.webex.com/meet/rrahimi [cid:image004.png@01D7F73E.6E065220] Josh Contreras Administrative Assistant School of Materials Engineering Neil Armstrong Hall of Engineering Office: 765-494-4100 [3749DD84]<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.purdue.edu_-3Futm-…>

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REMINDER: Preliminary Exam Seminar Date: Friday, December 17, 2021, 1:00pm via WebEx
by Contreras, Joshua Andres 16 Dec '21

16 Dec '21

Please consider attending this seminar: MATERIALS ENGINEERING SEMINAR "Cellulose Nanomaterials and Their Composites in the Field of Food Packaging" By Jingxuan Zhang Purdue MSE Preliminary Exam Advisor: Professor Jeffrey Youngblood ABSTRACT Currently used materials for food packaging are mostly oil-based polymers, and environmental pollution due to those materials represents one of the biggest concerns. The research in eco-friendly and sustainable materials for food packaging applications has accelerated for past years. Plant-based cellulose nanomaterials/nanocelluloses are biodegradable and non-toxic and have relatively high mechanical properties. However, the compatibility issue between the hydrophobic polymer matrix and the hydrophilic nanocellulose is one of the main obstacles that hinder applications within food packaging industry. In this study, we will compare cellulose nanomaterials and tradition al oil-base polymers, review the major ways of chemical modifications on cellulose nanomaterials and how they tune the mechanical and barrier property of the composite. Also, both traditional and modern ways of material processing is reviewed in this study. Finally, instead of the conventional NC/polymer composites that use nanocellulose as the filler, a novel way that use cellulose nanomaterials as the major component for packaging will be reported. Date: Friday, December 17, 2021 Time: 1:00pm Place: https://purdue.webex.com/webappng/sites/purdue/dashboard/pmr/jpyoungb [cid:image001.jpg@01D7F28F.56AE5630] Josh Contreras Administrative Assistant School of Materials Engineering Neil Armstrong Hall of Engineering Office: 765-494-4100 [3749DD84]<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.purdue.edu_-3Futm-…>

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REMINDER: Preliminary Exam Seminar Date: Wednesday, December 17, 2021; 9am via WebEx
by Contreras, Joshua Andres 16 Dec '21

16 Dec '21

Please consider attending this seminar: MATERIALS ENGINEERING SEMINAR "Microstructure and Defects in High-Strength Aluminum Alloys Produced by Selective Laser Melting" By Daniel Sinclair Purdue MSE Preliminary Exam Advisor: Professor Nikhilesh Chawla ABSTRACT Since the emergence of additive manufacturing (AM) techniques in the 1980's, the application of selective laser melting (SLM) has grown a niche method of prototyping to an enabling technology for the production of high-performance structural alloys. The paradigm shift associated with additive design is of particular interest to engineering fields like aerospace and automotive engineering, where improved efficiency of design has the potential to reduce weights and improve performance. Aluminum alloys, which constitute the most used light alloy family in aerospace, are of particular interest due to their natural synergy with the goal of weight reduction. However, issues with processability have so far limited the use of precipitation-strengthened alloy compositions. Porosity and hot cracking caused by SLM lead to insufficient mechanical performance, requiring processing controls and alloying additions which minimize the cracking susceptibility of age-hardening alloys. Recent research into these methods has shown competitive mechanical properties in SLM aluminum alloys relative to their wrought counterparts. The addition of ceramic or metallic particles during SLM serves to refine and mechanically reinforce the manufactured matrix. To explore the potential and shortcomings of SLM of high-strength aluminum, characterization of microstructure, defects, and mechanical properties is discussed. Additionally, initial results from the characterization of an SLM alloys produced by reactive additive manufacturing (RAM) are presented to address routes for the improvement of high-strength alloys. Preliminary work in this area has examined AA7050-RAM2, produced by Elementum 3D, through quantitative stereography, micro- and nano-hardness testing, and correlative tomography to understand the reaction of metallic particles with the 7050 aluminum alloy in situ as a method of grain refinement. Date: Wednesday, December 17, 2021 Time: 9:00 AM Place: https://purdue.webex.com/meet/nikc [cid:image002.jpg@01D7F28B.D42EC5D0] Josh Contreras Administrative Assistant School of Materials Engineering Neil Armstrong Hall of Engineering Office: 765-494-4100 [3749DD84]<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.purdue.edu_-3Futm-…>

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ARMS 2093 Closed 8-9 am, 12/17
by Stacey, Lisa A 15 Dec '21

15 Dec '21

Sending on behalf of Tim VanMeter: The ARMS 2093 lab will be closed from 8 to 9 am, this Friday, Dec. 17th. Please contact Tim VanMeter for any questions or issues. Thank you, Lisa Stacey Administrative Assistant to the Department Head School of Materials Engineering Neil Armstrong Hall of Engineering o: 765-494-4095 f: 765-494-1204 [3749DD84]<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.purdue.edu_-3Futm-…>

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REMINDER: Preliminary Exam Seminar, Tomorrow, Dec 16, Thursday, 10 AM by Webex
by Morgan, Yuan-Yu Karen 15 Dec '21

15 Dec '21

From: Morgan, Yuan-Yu Karen Sent: Thursday, December 2, 2021 4:36 PM To: msegradstudent-list(a)ecn.purdue.edu; msefaculty-list(a)ecn.purdue.edu; msepostdoc-list(a)ecn.purdue.edu Cc: Ku Blanco, Aury Y <akublanc(a)purdue.edu> Subject: (Corrected) Preliminary Exam Seminar, Dec 16, Thursday, 10 AM by Webex Please consider attending this seminar: "Time-Resolved Microstructural Characterization and Properties of the Apis Mellifera Honeycomb" By Rahul Franklin Purdue MSE Preliminary Exam Advisor: Professor Nikhilesh Chawla ABSTRACT The natural honeycomb, with its repeating hexagonal lattice cells made out of wax, is one of nature's best engineered structures. Even though the honeycomb has inspired several modern engineering structures, an understanding of how the bees build them is lacking. Further, all previous works on studying the structure of the honeycomb have been based on 2D microscopy techniques or by direct visual observations. As a result, several seminal features of the comb microstructure, and how it is built have been overlooked and ignored. In this talk, I will describe a series of experiments based on interrupted, time-resolved x-ray microscopy to study the mechanisms for building the comb as a function of time. For the first time, the precise mechanisms by which the bees build the combs, as well as the heterogeneous microstructure of the combs will be discussed. The findings of this work will help us in elucidating this problem and could have several widespread implications in fields such as additive manufacturing, composite materials, synthetic materials, and entomology. Date: December 16, Thursday, 2021 Time: 10:00 AM Place: Webex- https://purdue.webex.com/meet/nikc Yuan-Yu Karen Morgan,Ph.D. Academic Advisor-Graduate Program School of Materials Engineering Neil Armstrong Hall of Engineering, Room 2217 765-494-4103 ymorgan(a)purdue.edu<mailto:ymorgan@purdue.edu>

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REMINDER: Preliminary Exam Seminar for Chengyang Zhang Monday, December 13, 2021; 1:00pm via WebEx
by Contreras, Joshua Andres 10 Dec '21

10 Dec '21

Please consider attending this seminar: MATERIALS ENGINEERING SEMINAR "VO2: Metal-insulator Transition and Ferroelectric Heterostructures" By Chengyang Zhang Purdue MSE Preliminary Exam Advisor: Professor Shriram Ramanathan ABSTRACT Owing to the fascinating metal-insulator transition (MIT), vanadium dioxide (VO2) has attracted much attention in terms of material physics, synthesis, and device applications. VO2 undergoes an MIT showing several orders of resistivity change near room temperature at ~68°C. The phase transition that can be triggered both thermally and electrically renders VO2 thin films a promising candidate for sensors, smart windows, MEMS actuators, and computing applications, etc. However, the synthesis of high quality, phase pure VO2 thin films is extremely challenging due to the abundant stable phases vanadium and oxygen could form. This document summarizes the physical properties of VO2 and the underlying mechanisms of the MIT. Subsequently, synthesis, structural, and electrical characterizations of epitaxial and polycrystalline VO2 thin films were explored, and the influence of stoichiometry and lattice strain on the MIT properties were examined. Finally, novel VO2/ferroelectric heterostructure device concepts with intriguing performance were introduced. Date: Monday, December 13, 2021 Time: 1:00pm Place: Virtual-https://purdue.webex.com/meet/shriram Josh Contreras Administrative Assistant School of Materials Engineering Neil Armstrong Hall of Engineering Office: 765-494-4100 [3749DD84]<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.purdue.edu_-3Futm-…>

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FW: Email for distribution
by Stacey, Lisa A 10 Dec '21

10 Dec '21

Forwarding on behalf of Ale Strachan: Lisa Stacey Administrative Assistant to the Department Head School of Materials Engineering Neil Armstrong Hall of Engineering o: 765-494-4095 f: 765-494-1204 [3749DD84]<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.purdue.edu_-3Futm-…> ________________________________ Subject: Register today: Free, hands-on Thermo-Calc Educational Workshop on December 15th, 1:00 PM EST Join our upcoming hands-on workshop on thermodynamics and kinetic calculations in materials science using Thermo-Calc. Motivated by integrated materials engineering (ICME) and the materials genome (MGI), the hands-on workshop will exemplify the use of Thermo-Calc in the classroom and research. The target audience is instructors, researchers and students. The academic version of Thermo-Calc is now freely available in nanoHUB through a collaboration between Thermo-Calc and nanoHUB. You can access this software by joining the Thermo-Calc group in nanoHUB: https://nanohub.org/groups/tcacademic. Title: Integrated Computational Materials Engineering in the Classroom: Teaching Fundamental Thermodynamics and Kinetics Through an Industry-Focused Lens using Free Online Simulations. Presenter: Adam Hope, PhD, Thermo-Calc Software Inc. Date/Time: Wednesday, December 15, 2021 from 1:00 PM – 2:00 PM EST Register here: https://purdue.webex.com/purdue/onstage/g.php?MTID=e1f44a88da6016a3b691b737… Abstract: Both the National Academies report on Integrated Computational Materials Engineering and the Materials Genome Initiative have highlighted the importance of linking materials, chemistry, and processing to microstructure in order to predict and engineer material properties and performance. This is especially important in the context of Industry 4.0. However, some of the challenges in implementing such an approach are: * Linking models across length scales * The lack of materials property data as a function of chemical composition and temperature * The lack of familiarity and awareness of engineers on design teams as to the different types of modeling tools which are outside their background, especially those which transcend the more traditional gaps between materials science and mechanical engineering. Modeling chemistry-process-structure relationships requires a solid foundation of thermodynamics, phase equilibria and kinetics. The CALPHAD (Calculation of Phase Diagrams) method fits this need. CALPHAD is a phenomenological approach for calculating/predicting thermodynamic, kinetic, and other properties of multicomponent materials systems. It is based on describing the properties of the fundamental building blocks of materials, starting from pure elements and binary and ternary systems. With extrapolation from the binary and ternary systems, CALPHAD predicts the properties of higher order alloys. Over the last decades, the CALPHAD method has successfully been used for development of numerous real engineering materials. CALPHAD tools are not only a critical component of any ICME framework, but they also create an opportunity to assist in teaching thermodynamics - from understanding the influence of chemistry on Gibbs free energy to constructing simple binary phase diagrams. This fundamental approach can then be extended to multicomponent systems to study real engineering materials. This presentation will demonstrate ways that Thermo-Calc can be used in the classroom, as a teaching tool, and in industry, as a research and problem solving tool for any ICME framework. Bio: Adam received his PhD in Welding Engineering at The Ohio State University. His work was focused on integrating computational and experimental techniques to predict susceptibility to weld cracking, and to develop new weld metal compositions for nuclear power applications. Adam currently works at Thermo-Calc Software providing training and applications support to users. I hope that you can join us in this workshop! Please share this invitation with others who may be interested. Regards, Alejandro Strachan Deputy Director, nanoHUB -- Alejandro Strachan Professor of Materials Engineering, Purdue University Network for Computational Nanotechnology - nanohub.org<http://nanohub.org> Center for Predictive Materials and Devices (c-PRIMED)

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REMINDER: Preliminary Exam Seminar- Thursday, December 9, 2021, Time: 12:30pm - 1:30pm, Room HAMP 2021 or by Webex
by Contreras, Joshua Andres 09 Dec '21

09 Dec '21

Please consider attending this seminar: MATERIALS ENGINEERING SEMINAR "Alkali Treatments for Solution Processed Cu(In, Ga)(S, Se)2 Films and Photovoltaic Devices" By Anna Murray Purdue MSE Preliminary Exam Advisor: Professor Carol Handwerker and Professor Rakesh Agrawal ABSTRACT The world is increasingly in need of renewable energy sources that can be deployed on a large scale. Cu(In, Ga)(S, Se)2 (CIGSe) solar photovoltaic devices are highly efficient when fabricated through vacuum processes, especially with recent developments in heavy alkali (K, Rb, Cs) post-deposition treatments pushing record efficiency up to 23.35%. Solution processes such as nanoparticles and molecular precursors have the potential to produce the same material through more scalable and less costly methods, but record efficiency for these devices lags behind at 18.3%. Heavy alkali post deposition treatments increase band gap and copper depletion at the surface of p-type CIGSe, allowing for a better interface with the n-type CdS buffer layer. This study aims to understand the mechanisms by which heavy alkalis improve vacuum processed CIGSe device efficiency in order to use heavy alkali treatments on solution processed CIGSe films. This involves studying proposed theoretical reasons for experimentally measured optoelectronic property improvement in order to predict which changes will also occur in solution processed CIGSe, and utilize these treatments for higher efficiency devices. This also requires understanding the differences in phase transformations and grain sintering behavior between the same material when it is made through vacuum and solution processes. Heavy alkali post deposition treatments for solution processed CIGS are of particular interest, as this may positively affect the electrical properties with fewer changes in the film microstructure. This study aims to predict how to best design these treatments, then identify changes in material properties that will lead to high efficiency devices. Careful examination of nano/microscale material properties is necessary in order to holistically understand changes in device efficiency as well as the mechanisms that lead to these changes. Date: Thursday, December 9, 2021 Time: 12:30pm - 1:30pm Place: HAMP 2021 or https://purdue.webex.com/join/carolh Josh Contreras Administrative Assistant School of Materials Engineering Neil Armstrong Hall of Engineering Office: 765-494-4100 [3749DD84]<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.purdue.edu_-3Futm-…>

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MSE Safety & Equipment Newsletter for December 2021
by Erk, Kendra A 08 Dec '21

08 Dec '21

To view this newsletter as a PDF, visit https://engineering.purdue.edu/Intranet/Groups/Schools/MSE/Facilities/Safet… MSE Safety & Equipment Newsletter for December 2021 *** Important Upcoming Dates * December 17: Last day for MSE 499 students to work in the MSE lab spaces until the start of spring semester on January 10. * December 23 to January 2: University is officially closed for winter recess. *** Winter Recess: December 23, 2021 to January 2, 2022 While paid MSE research personnel are allowed to work in MSE lab spaces during winter recess, please be aware that MSE technical staff and REM safety staff will not be available during that time to assist with your research activities or provide help in the case of an emergency. If assistance is required during the recess, the Purdue Police non-emergency phone number is (765) 494-8221 or for emergencies, dial 911. Contact your research advisor or lab supervisor for additional guidance. *** Annual Indemnification Process Begins in January for ARMS, MSEE, and IMI As part of our Integrated Safety Plan lab certification with REM, each year we conduct a guided "self-audit" of the safety training procedures, hazards, and hygiene of all lab spaces that MSE personnel utilize at Purdue. Self-audit guidance will be distributed to lab supervisors in January. To prepare, as our fall semester draws to a close, MSE personnel may wish to review the self-audit checklist<https://www.purdue.edu/ehps/rem/documents/forms/ispcheck.pdf> now and identify/abate any lingering lab safety and hygiene issues in the lab space where they most frequently work. (Note: This self-audit process has already begun for MSE lab spaces in Kepner and FLEX.) *** Chemical Handling Procedures in ARMS 2132 Following a thorough review by REM staff, users of the MSE Polishing Lab (ARMS 2132) can resume the use of chemical activities but new restrictions are in place to ensure lab user safety: 1. Due to repeated issues, any users who wish to etch with Nital must use a commercially available, pre-mixed solution (that is, users are now prohibited from making their own Nital solutions from concentrated chemicals for the safety of REM staff and MSE researchers). 2. The use of all acids, oxidizers, and Nital is now restricted in ARMS 2132 to only users who have an approved single-task Hazard Assessment<https://www.purdue.edu/ehps/rem/forms/allforms.html#H> (HA) form with the relevant SDS and SOP. Documents should be submitted to Jenni Fifer<mailto:fiferj@purdue.edu> and please note that no new HAs will be approved between Dec. 17 to Jan. 2. 3. Acids, oxidizers, and Nital usage is prohibited in ARMS 2132 during winter recess. These policy changes are due to an increasing number of safety incidents and near misses in ARMS 2132 from self-pressurizing waste containers. Email mse-safety(a)purdue.edu<mailto:mse-safety@purdue.edu> for more information. *** Equipment Reporting Reminder If you encounter a piece of broken equipment, or have any questions about a specific piece of equipment, you should contact a member of the MSE Technical Staff: * For sample prep (i.e., saws, grinding wheels) equipment: Tim VanMeter<mailto:tcvanmet@purdue.edu> * For mechanical testing equipment and general use equipment checklist suggestions: Jenni Fifer<mailto:fiferj@purdue.edu> * For characterization equipment and iLab: Talukder Alam<mailto:alam18@purdue.edu> *** Important Links and Contact Information * Protect Purdue<https://protect.purdue.edu/>: COVID-19 resources and reporting * IN Dept. of Health COVID-19 Resources and Stats<https://www.coronavirus.in.gov/> * For general safety questions, concerns, and lab access issues: mse-safety(a)purdue.edu<mailto:mse-safety@purdue.edu> or speak directly to MSE Safety Officer Jenni Fifer<mailto:fiferj@purdue.edu> (ARMS 2207) * For iLab equipment training and issues: Talukder Alam<mailto:alam18@purdue.edu> (ARMS 2207) * Equipment/Safety/Consumables Reporting Form<https://purdue.ca1.qualtrics.com/jfe/form/SV_7QcGyO9IVMwWRPD?_ga=2.24554381…> * Purdue REM Researcher's Guide<https://www.purdue.edu/ehps/rem/laboratory/researchers.html#cs2> * ARMS general safety information<https://engineering.purdue.edu/Intranet/Groups/Facilities/ArmstrongHall> * Purdue Police Non-Emergency: (765) 494-8221 * Purdue Fire Non-Emergency: (765) 494-6919 * Purdue REM Non-Emergency: (765) 494-6371 * For all emergencies, dial 911. Thanks for reading everyone! Have a great winter break and stay safe! ~ Prof. Erk and the MSE Safety Committee Kendra A. Erk Associate Professor of Materials Engineering Purdue University soft-material-mechanics.squarespace.com

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