PARISlab research group at UCLA

Research group of Prof. Bauchy

Open positions

• Fall 2020PhD

  Multiple Ph.D. Student Positions

  We have several open Ph.D. positions (starting in Fall 2020 or ealier) in the domains of multi-scale simulations of materials and machine learning.

• Any timeB.S.

  Undergraduate Internship

  Research internships in various areas are possible at any time in the year.

• Fall 2019Post-PhD

  Open Postdoc Positions

  We have several open postdoctoral positions for projects involving atomistic simulations of disordered materials, machine learning, and glass mechanics.

Funding

• Department of Energy (DOE)

  Nuclear Energy University Program (NEUP)

  1) Decoding Zeolite Crystallization and Stage III in Nuclear Waste Glasses by Coupled Modeling and Experiments

  2) The Influences of Neutron Irradiation on Aggregate Induced Degradation of Concrete

• National Science Foundation (NSF)

  Civil, Mechanical and Manufacturing Innovation (CMMI)

  1) Fracture Mechanics of Glasses with Nanoscale Phase Separation – A Multiscale Experimental and Computational Study

  2) Elucidating the Physical Origins of Creep in Cementitious Materials Towards Improved Prediction and Prescription of Creep-Resistant Binders

• Corning Incorporated

  1) Understanding, Predicting, and Controlling Relaxation in Silicate Display Glasses

  2) Modeling the Mechanical Response of Glass

  3) Understanding, Predicting, and Improving Glass Intrinsic Durability

• Oak Ridge National Laboratory (ORNL)

  Assessing the Influences of Radiation Exposure on the Mechanical Properties of the Mineral Aggregates Embedded in Reactor Concretes

Awards received by PARISlab members

• 2019
  Rising Star in Computational Materials Science

  Prof. Bauchy received the 2019 Rising Star in Computational Materials Science Award, which recognizes the accomplishments and promise of early-stage researchers (awarded by Elsevier).

  https://www.materialstoday.com/materials-chemistry/news/recipients-of-the-2019-rising-stars/

• 2019
  Materials 2019 Young Investigator Award

  

  Prof. Bauchy received the Materials 2019 Young Investigator Award from MDPI, which recognizes ground-breaking contributions to materials science.

  https://www.mdpi.com/journal/materials/awards.pdf/0/14_2019_2_2019-2-15_Materials%202019%20Young%20Investigator%20Award%20Winner%20flyer.pdf

• 2019
  Outstanding B.S. Student Award – Kai Yang

  

  CEE Department Outstanding B.S. Student Award
• 2019
  GOMD Travel Grant – Qi Zhou

  Travel grant to attend the GOMD 2019 meeting of the American Ceramic Society in Boston, MA.
• 2019
  GOMD Travel Grant – Han Liu

  Travel grant to attend the GOMD 2019 meeting of the American Ceramic Society in Boston, MA.
• 2019
  GOMD Travel Grant – Zhe Wang

  Travel grant to attend the GOMD 2019 meeting of the American Ceramic Society in Boston, MA.
• 2018
  Best JACerS Paper Award – Tandré Oey, Yingtian Yu, Mathieu Bauchy, Gaurav Sant

  

  2018 Best Paper Award attributed by the Journal of the American Ceramic Society.
• 2018
  GOMD Travel Grant – Tao Du

  Travel grant to attend the GOMD 2018 meeting of the American Ceramic Society in San Antonio, Texas.
• 2017
  UCLA-ASCE Professor of the Year

  Prof. Bauchy received the ASCE-UCLA Professor of the Year award.
• 2017
  Glass Age Scholarship – Xin Li

  The Glass Age Scholarship is awarded to one student at the collegiate level, providing an opportunity to work closely with Corning scientists on a research project to help guide academic glass science research.

  Xin Li is a M.S. student in the Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab) at the University of California, Los Angeles – she is the 2017-2018 Glass Age Scholar. She will be working collaboratively with Corning Incorporated scientists and UCLA engineers to continue research in glass science and highlight the importance of research at the academic level.

  Glass Age Scholarship 2017/2018

• 2017
  Alfred R. Cooper Scholars Award - Yushu Hu

  The Alfred R. Cooper Scholars Award recognizes an undergraduate student who has demonstrated excellence in research, engineering, and/or study in glass science or technology. It is awarded by the Glass & Optical Materials Division of The American Ceramic Society. This undergraduate award is named in honor of the late Professor Alfred R. Cooper, Jr., member of the faculty at Case Western Reserve University and a prominent contributor to the understanding of many glass phenomena and glass problems.

  2017 Cooper Award

• 2017
  Norbert J. Kreidl Award - Yingtian Yu

  

  The Norbert J. Kreidl Award for Young Scholars is attributed by the American Ceramic Society and recognizes research excellence in glass science.

  Title: Stretched exponential relaxation of glasses: Origin of the mixed alkali effect

  Abstract: Although it is commonly believed that as frozen supercooled liquids, glasses should continue to flow over the years (e.g., in the case of the stained glass windows of medieval cathedrals), the dramatic increase of their viscosity below the glass transition temperature suggests the contrary—that their relaxation time is on the order of 10³² years at room temperature. A recent study conducted by Mauro et al. reported the intriguing dynamics of the relaxation of a commercial Corning^® Gorilla Glass^® at room temperature, over 1.5 years. We report a novel atomistic simulation method that allows us to directly access the long-term (years) dynamics of glass relaxation at room temperature. Based on the simulation of a series of mixed alkali silicate glasses, we demonstrate that room temperature relaxation is a direct consequence of the mixed alkali effect. Although both volume and energy feature a stretched exponential relaxation, our results reveal a bifurcation of the stretching exponents, with b = 3/5 and 3/7 for energy and volume relaxation, respectively. Relaxation occurs through the diffusion of local stressed structural instabilities inside the atomic network, which anneal each other when a compressed atomic unit meets one that is under tension. The driving force for this diffusion-trap relaxation mechanism is at a maximum when the concentrations of each alkali atom equals each other, which arises from a balance between the concentration of each alkali atom and the magnitude of the local stress that they undergo.

  2017 Norbert J. Kreidl Award

• 2017
  GOMD Poster award – Yingtian Yu

  

  Award received at the GOMD meeting for the poster “Origin of the Mixed Modifier Effect on Hardness”
• 2017
  GOMD Travel Grant – Yingtian Yu

  

  Travel grant to attend the GOMD 2017 meeting of the American Ceramic Society in Waikoloa, Hawaii.
• 2016
  GOMD Poster award – Mengyi Wang

  

  Award received at the GOMD meeting for the poster “Topological control on the dissolution of borosilicate glasses”
• 2016
  GOMD Travel Grant – Mengyi Wang

  

  Travel grant to attend the GOMD 2016 meeting of the American Ceramic Society in Madison.
• 2015
  Glass Age Scholarship – Mengyi Wang

  

  The Glass Age Scholarship is awarded to one student at the collegiate level, providing an opportunity to work closely with Corning scientists on a research project to help guide academic glass science research.

  Mengyi Wang is a M.S. student in the Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab) at the University of California, Los Angeles – she is the 2015-2016 Glass Age Scholar. Wang was selected for her academic research proposal, which spanned multiple areas of interest to the glass science industry, as part of Corning’s Glass Age Scholarship Program. She will be working collaboratively with Corning Incorporated scientists and UCLA engineers to continue research in glass science and highlight the importance of research at the academic level.

• 2014
  Future Leader Nomination - The American Ceramic Society

  

  The nomation to the Future Leader Program (FLP) recognises exemplary work and potential as a future leader in the ceramics and glass industry.

  2014 Future Leader Program

• 2012
  Norbert J. Kreidl Award - The American Ceramic Society

  

  The Norbert J. Kreidl Award for Young Scholars is attributed by the American Ceramic Society and recognizes research excellence in glass science.

  Topological Constraints and Rigidity of Network Glasses from Molecular Dynamics Simulations

  Topological constraint theory provides an interesting means to understand the important microscopic physics governing the thermal, mechanical and rheological properties of glasses with changing compositions, while filtering out unnecessary details that ultimately do not affect its macroscopic properties. It has been successful in predicting compositional trends in covalent network-forming glasses such as chalcogenides. Its application appears however more challenging in iono-covalent glasses such as silicates where neighbors/bonds and angles need to be properly defined. Here we derive such constraints for different alkali silicates using an atomic scale approach (Molecular Dynamics, MD) combined with partial bond angle distributions (PBAD). The latter allows having access to the second moments (standard deviations) of the distributions. Large (small) standard deviations correspond to large (small) angular excursions around a mean value, and are identified as broken (intact) bond-bending constraints. A similar procedure is used for bond-stretching constraints. Systems examined include glassy and liquid disilicate 2SiO2-M2O (LS2, NS2, KS2). In the glass, MD constraint counting closely matches Maxwell enumeration of constraints using the octet binding (8-N) rule. Results show that the standard deviations of the partial bond angle distributions increase with temperature and suggest a softening of bond-bending constraints. A bimodal bonding oxygen distribution is obtained for T>Tg, and the fraction of thermally activated broken bond-bending constraints computed as a function of temperature. As a preliminary work, pressure effects are also presented. Overall, these results provide a microscopic rationale for extending constraint counting from chalcogenides to complex oxides, and also a numerical basis for recent functional forms of temperature-dependent constraints proposed from energy landscape approaches.

  2012 Norbert J. Kreidl Award