Calendar of Events
APS Storage Ring Upgrade, year long shutdown
https://www.aps.anl.gov/APS-Upgrade
XSD/MIC Special Presentation
Speaker: Amey Luktuke, Purdue University
Title: Understanding the microstructural evolution of Sn-Bi solder alloys during solidification using Synchrotron X-ray Tomography and Diffraction
Date: June 13, 2023
Time: 9:00 a.m.
Location: Microsoft Teams meeting
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Abstract:
With a constant emphasis on the miniaturization of electronic devices, there has been significant attention given to new electronic packaging strategies in recent years. One such strategy is Heterogeneous Integration Packaging (HIP), which favors the use of low-melting solder alloys. Among these alloys, Sn-Bi alloys have been investigated as potential replacements for traditional Sn-Pb and SAC solder alloys due to their considerably lower melting temperatures. The presence of the Bi phase in the microstructure plays a vital role in determining the mechanical behavior and reliability of Sn-Bi solder joints. However, the underlying mechanisms governing the evolution of the Bi phase during solidification are still not fully understood. Additionally, the morphology of the faceted Bi phase remains poorly characterized. Experimental characterization of the phase formation is crucial to develop appropriate processing conditions for enhanced solder performance. In this presentation, I will discuss a systematic approach to characterizing the microstructure of alloys during solidification, utilizing non-destructive X-ray tomography and diffraction techniques, starting from lab-scale experiments, and progressing to the use of Synchrotron sources. The influence of critical experimental parameters, such as the cooling rate during solidification, was evaluated to better understand their impact on the microstructure. To gain a comprehensive understanding of the solidification dynamics, a 4D study was conducted, involving the analysis of 3D microstructures along with time evolution, using Synchrotron White beam tomography. To successfully image high-density materials, a specialized experimental setup was developed at the 7-BM beamline at Argonne National Lab. This involved optimizing various imaging parameters, including X-ray spectrum filtering, the number of X-ray projections etc. The 4D analysis of microstructural evolution provided crucial insights into facet formation, growth kinetics, and the atomistic mechanisms governing the formation of the Bi phase. Moreover, simultaneous X-ray tomography and Energy Dispersive Diffraction (EDD) were employed to understand the morphological and compositional changes during the solidification process. The presentation will discuss the detailed quantitative and qualitative correlation between the growth of the Bi phase and the evolution of diffraction peaks. The experimental methodology developed in this work has the potential to be extended to investigate a wide range of alloy solidification mechanisms, enabling a deeper understanding of the field.
PSC All Hands Meeting
Wednesday, June 14, 2023 10:00 AM-11:00 AM
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3rd ISRD-RCN Workshop
In-situ Studies of Rock Deformation
NSF Research Coordination Network
The 3rd ISRD-RCN workshop, jointly hosted by the University of Maryland (UMD) and the National Institute of Standards and Technology (NIST), will take place in-person at The Hotel UMD on July 25-27, 2023. This workshop will focus on neutron scattering and imaging as well as their applications in studying the dynamic properties of earth and planetary materials. Here is the tentative agenda.
In-situ Studies of Rock Deformation – NSF Research Coordination Network (isrdrcn.org)
Registratin : 3rd ISRD-RCN Workshop Registration | UMD Conferences & Visitor Services (certain.com)
In-situ Rock Deformation (ISRD) RCN Workshop
Exploring Dynamic Properties of Earth and Planetary Materials Using Neutron Scattering and Imaging, will be held on July 25-27, 2023 at The Hotel UMD.
July 24 (Monday): Check-in at The Hotel UMD after 3pm.
July 25 (Tuesday): Day 1
7:00-8:00am: breakfast
Session I: Exploring Dynamic Material Properties Using Neutron (Chair: Dan Hussey)
8:00-8:30am: Opening remarks (Dan and Wenlu)
8:30-9:30am: Larry Anovitz (ORNL)
Overview of neutron scattering for geology
9:30-10:00am Coffee break
10:00-11:00am: Brian Kirby (NIST)
Neutron sources, accessing user programs, the NCNR CHRNS program
11:00-12:00pm: Alessandro Tengattini (ILL)
Simultaneous Neutron/X-ray tomography of (deforming) geomaterials
12:00-1:30pm: Lunch
1:30-4:30pm: Visiting NIST
6:00-7:30pm: dinner at The Hotel UMD
Session II: Neutron Sample Environments (Chair: TBD)
7:30-8:30pm: Yun Liu (NIST)
Small angle Neutron Scattering (SANS) to measure the equation of state in shale
8:30-9:30pm: discussion
July 26 (Wednesday): Day 2 7:00-8:00am: breakfast Session III: Neutron Diffraction and Imaging (Chair: Doug Schmitt) 8:00-9:00am: Javier Campo (INMA/ILL) High pressure neutron diffraction 9:00-10:00am: Juscelino Leao (NIST) Neutron sample environments for high pressure and temperature 10:00-10:30am coffee break 10:30-11:30am: Bianca Haberl (ORNL) Neutron Diffraction at SNAP 11:30-12:00 am: discussion 12:00-1:30pm: Lunch Session IV (Posters): Study of Earth and Planetary Materials (Chair: Wen-lu Zhu) 1:30-3:30pm: Poster viewing 3:30-6:30pm: Visiting Annapolis 6:30-8:30pm: Dinner at Buddy’s Crabs and Ribs July 27 (Thursday): Day 3 7:00-8:00am: breakfast Session V: Recent Advances at Neutron Beamlines (Chair: TBD) 8:00-9:00am: Heloisa Bordallo (UCPH/ESS) Inelastic Neutron Scattering for studying water in geology 9:00-10:00am: Hassina Bilheux (ORNL)
Neutron Bragg Edge Imaging at VENUS
10:00-10:30am coffee break
10:30-11:30am: Jacob LaManna (NIST)
Emerging Neutron Imaging Methods
11:30-12:00 am: discussion and adjourn
PSC All Hands Meeting
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25th National School on Neutron and X-ray Scattering
The 25th National School on Neutron and X-ray Scattering (NXS) will take place from August 6-18, 2023, jointly conducted by Argonne National Laboratory (ANL) and Oak Ridge National Laboratory (ORNL).
The main purpose of NXS is to educate graduate students in the use of major neutron and x-ray facilities. Lectures, presented by researchers from academia, industry, and national laboratories, include basic tutorials on the principles of scattering theory and the characteristics of the sources, as well as seminars on the application of scattering methods to a variety of scientific subjects. Students will conduct short in-person experimental tutorials at Argonne’s Advanced Photon Source and at Oak Ridge National Laboratory’s Spallation Neutron Source and High Flux Isotope Reactor, which provide hands-on experience for using neutron and synchrotron sources.
To apply for NXS 2023, read the application instructions posted at http://bit.ly/NXSchool and submit your application by March 13, 2023.
PSC All Hands Meeting
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PSC All Hands Meeting
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PSC All Hands Meeting
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