March 2019 - Msepostdoc-list

Seminar Notice for Angel Pena's Ph.D. Final. Thursday, April 4, at 9:00 a.m., in ARMS 3115. "Evaluation of Rare-Earth Element Dopants (Sm and Er) Effect on the Ablation Resistance and Emittance Tailoring of ZrB2/SiC Sintered Billets"
by Son, Rosemary E 25 Mar '19

25 Mar '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Evaluation of Rare-Earth Element Dopants (Sm and Er) Effect on the Ablation Resistance and Emittance Tailoring of ZrB2/SiC Sintered Billets" By Angel Antonio Pena Purdue MSE Ph.D. Final Exam Advisor: Professor Rodney W. Trice ABSTRACT Hypersonic flight causes ultra-high surface temperatures which are most intense on sharp leading edges. One way of reducing the surface temperature is to apply a high emittance ceramic on the leading edge, increasing the radiation component of heat transfer. An ideal HEC must have a high emittance, while also possess a strong ablation resistance. From a scientific standpoint, it would be helpful if emittance could be tailored at different wavelengths. The approach used to create a ceramic with tailorable emittance was the use two different rare-earth elements, adding them to a ultra-high temperature ceramic (UHTC) in small quantities. The samarium element was added to increase the emittance of the UHTC over a large wavelength range, and the erbium element was added to decrease the emittance at specific wavelength ranges. The goal of this study was to create an UHTC with tailorable emittance while maintaining the required ablation resistance. Therefore, ZBS billets with five different Sm to Er ratios and with a nominal total amount of 3 mol.% dopant incorporated were prepared by sintering in vacuum to 2000 °C. The ablation resistance was evaluated by using an oxyacetylene torch and observing at exposure times of 60s and 300s, whereas the emittance was evaluated at the Air Force Research Lab facilities via a laser heating testing. The results for the ablation testing showed that ZBS billets co-doped with Sm and Er formed a beneficial c1-(Sm/Er)0.2Zr0.8O1.9 oxide scale as the majority phase, which is more thermally stable than the m-ZrO2 oxide scale typically formed in oxidized ZBS systems. The crystalline and the amorphous phases were formed by a convection cell mechanism. Differences in surface temperatures between ZBS samples with different dopant ratios suggest differences in spectral absorptance/emittance between each of the five compositions evaluated. Despite the emittance profiles by varying the Sm:Er molar ratios were similar because m-ZrO2 was formed as the major oxide phase, the emittance study showed that the erbium oxide influences the emittance profile, as can be noted by the maximum and minimum emittance peaks. Results showed that the emittance changes as a function of the Sm:Er molar ratios and temperature at shorter wavelength ranges. These changes in the emittance are caused by the different Sm and Er concentrations on the surface. Future work should be focused on producing the beneficial c1-(Sm/Er)0.2Zr0.9O1.8 phase directly from the manufacturing process, and therefore, maximize the effect of varying the Sm:Er molar ratios to tailor the emittance. This study represents the first generation and reported emittance data of UHTC doping ZBS systems with both Sm and Er elements. Date: Thursday, April 4, 2019 Time: 9:00 A.M. Place: ARMS 3115

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REMINDER Today: MSE 690 Seminar Speaker - Sunghwan Lee, Ph.D., Monday, March 25, 2019/ARMS 1010 - 3:45
by Coar, Stacey L 25 Mar '19

25 Mar '19

[cid:image001.jpg@01D4E2EA.70F7CE20] 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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Keys found
by Coar, Stacey L 22 Mar '19

22 Mar '19

Good afternoon, There was a set of keys found and turned into the Main MSE desk, if they are yours please come and get them :) 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: MSE 690 Seminar Speaker - Sunghwan Lee, Ph.D., Monday, March 25, 2019/ARMS 1010 - 3:45
by Coar, Stacey L 22 Mar '19

22 Mar '19

Good morning, Dr. Sunghwan Lee will be here on Monday, March 25 to give a seminar for MSE 690 at 3:45 in ARMS 1010. Please join us. [cid:image001.jpg@01D4E09C.4BCF16D0] 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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Safety Update: Lab coats, Self-Audit Checklists, LOTO training
by MSE Safety 21 Mar '19

21 Mar '19

Dear Graduate Students and Postdoctoral Researchers, I have a few safety items to update you all about... Item 1: Lab Coats Thank you all for complying with our new policy of wearing lab coats in CHP lab spaces. I know many of the lab supervisors have also installed garment racks for you to use for storing your coats (since your coats should NOT be stored in your offices) and this is great. To help those of you who use the ARMS second-floor polishing lab (ARMS 2132), there is now a garment rack next-door in the optical lab (ARMS 2130) for you to store your lab coat. Additionally, there is a new supply of shared-use lab coats on the rack which you may choose to use when you are working in the polishing lab. Current lab coat sizes are M-XXL but I have also ordered X and XS which should arrive shortly. Item 2: Self-Audit Checklists Thanks to everyone who helped with our annual safety inspection process by completing a Self-Audit Checklist for your lab spaces within ARMS and MSEE. I wanted to let you know that you are encouraged (but not required) to complete one of these checklists, at any time, for any lab space that you work in that is affiliated with Purdue - including shared-use labs in Birck, Bindley, IMI, Zucrow, Physics, FLEX, etc. Once completed, you should scan and email the checklist to mse-safety(a)purdue.edu and I will pass it on to REM. This is a particularly useful way to communicate any concerns you have about a given space to the MSE Safety Committee as well as REM. Attached is a blank self-audit checklist for your use . Item 3: Lockout/Tagout Training (LOTO) Extra caution and special procedures must be followed when performing any service or maintenance on electrical equipment within our lab spaces, including furnaces, mills, and mechanical equipment. To perform these tasks in a safe manner, Purdue employees must undergo LOTO Training and become authorized by REM to perform these kinds of tasks. If you currently do any significant maintenance or service on equipment within your lab space, you should talk to your research advisor (and/or lab supervisor) to determine if you should undergo LOTO Training. For example, you do NOT need LOTO Training to perform basic installations on a computer (e.g., installing more RAM, new videocard etc) but you DO need LOTO Training to install a new heating element within a furnace or perform any service on equipment that is high-voltage. To request LOTO Training, you should email Kristi Evans (REM) at klevans(a)purdue.edu, and CC mse-safety(a)purdue.edu. Please let me know if you have any questions. Thanks, Prof. Erk and the MSE Safety Committee

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MSE 690 Seminar Speaker - Sunghwan Lee, Ph.D., Monday, March 25, 2019/ARMS 1010 - 3:45
by Coar, Stacey L 20 Mar '19

20 Mar '19

Good morning, Dr. Sunghwan Lee will be here on Monday, March 25 to give a seminar for MSE 690 at 3:45 in ARMS 1010. Please join us. [cid:image001.jpg@01D4DF09.6A3F9AC0] 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 Jerome Nash's Ph.D. Final Exam, Monday, March 18, at 2:30 p.m., in ARMS 1028. "Interfacial Rheology and the Controlled Fabrication/Disruption of Stabilized Emulsions"
by Son, Rosemary E 14 Mar '19

14 Mar '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Interfacial Rheology and the Controlled Fabrication/Disruption of Stabilized Emulsions" By Jerome J. Nash Purdue MSE Ph.D. Final Exam Advisor: Professor Kendra A. Erk ABSTRACT Fluid interfaces containing surface-active species (e.g., surfactants, polymers, and particles) have rheological properties that are vital to the kinetic stability of emulsions. Many practical applications of emulsions necessitate superb stability during storage, such as in emulsion-based therapeutic delivery systems. While in other cases, stabilized systems are entirely unwanted (e.g., separating oil and aqueous phases in enhanced oil recovery and bilge water applications). Techniques for modulating emulsion stability are highly desired and are largely determined by the mechanics of the interfacially-trapped species. However, the utility of these techniques is often limited by difficulties in measuring and interpreting the rheological characteristics of complex fluid interfaces. Lack of control over interface formation during emulsification magnifies this problem, further obscuring relationships between interfacial rheology and bulk emulsion stability. Thus, the objectives of this research were to (1) elucidate these fundamental relationships through emulsion stability and interfacial rheological measurements, and (2) present innovative methodologies for modulating the kinetic stability of model oil-in-water emulsions using physical chemistry principles. Objective 1 was addressed by studying correlations between the dilatational rheology of single- and multi-component oil-water interfaces and the susceptibility to coalescence of the bulk systems they comprised. Oscillating pendant drop tensiometry was used to probe interfacial viscoelastic behavior, while dynamic light scattering and optical microscopy were used to characterize coalescence susceptibility in bulk oil-in-water emulsions. The magnitude of the low-frequency dilatational elastic modulus was shown to positively correlate with oil droplet coalescence resistance over time. Objective 2 was addressed by analyzing how physical chemistry principles can be applied to control various emulsion droplet destabilization phenomena and produce desirable bulk behavior. To this aim, two emulsion destabilization studies were performed; one related to the nanoparticle-induced flocculation of oil droplets in a dilute, electrostatically-stabilized emulsion and one related to the convective flows generated by the asymmetric dilatational rheology of coalescing droplets. The knowledge garnered from this body of work is highly relevant to academic and industrial emulsion formulators who seek inexpensive, yet robust methods for predicting, characterizing and tailoring the kinetic stability of oil-in-water emulsions. Date: Monday, March 18, 2019 Time: 2:30 P.M. Place: ARMS 1028

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Reminder TODAY: MSE 690 speaker Cabot Microelectronics Corporation, Friday, March 8, 2019 at 3:30pm/ARMS 1010
by Coar, Stacey L 08 Mar '19

08 Mar '19

[cid:image001.png@01D4D4C0.6FE73620] 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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Recall: MSE Student Night April 25, 2018, Please Respond
by Coar, Stacey L 07 Mar '19

07 Mar '19

Coar, Stacey L would like to recall the message, "MSE Student Night April 25, 2018, Please Respond".

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MSE Student Night April 25, 2019, Please Respond
by Coar, Stacey L 07 Mar '19

07 Mar '19

From: Coar, Stacey L Sent: Thursday, March 07, 2019 2:42 PM To: 'msepostdoc-list(a)ecn.purdue.edu' <msepostdoc-list(a)ecn.purdue.edu>; 'msefaculty-list(a)ecn.purdue.edu' <msefaculty-list(a)ecn.purdue.edu>; 'msegradstudent-list(a)ecn.purdue.edu' <msegradstudent-list(a)ecn.purdue.edu>; 'mseundergrads-list(a)ecn.purdue.edu' <mseundergrads-list(a)ecn.purdue.edu>; 'msestaff-list(a)ecn.purdue.edu' <msestaff-list(a)ecn.purdue.edu> Subject: MSE Student Night April 25, 2018, Please Respond Greetings Everyone, It is our favorite time of year, MSE Student Night, this year it will be held on April 25th from 6:30 - 8pm. This event is a great opportunity to network with your peers, industry professionals, faculty and staff, and food will be provided. This is also a great opportunity to see this year's senior design posters and the press boxes at Ross-Ade! See information below: [cid:image001.jpg@01D4D4F3.F69EF120] Important Info: * RSVPS are required (even for seniors) * Business attire, photos will be taken with Sponsors * Student and Faculty award presentations will be presented during the program RSVP at MSE student night 2019 survey<https://purdue.ca1.qualtrics.com/jfe/form/SV_bHkvgdmw35UcSI5> by April 11th if you have not taken the survey. 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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