Category Archives: Seminars/Talks

22 Feb 2017 @ 3.30pm: Seminar by Prof. Jerzy Antoni Szpunar, University of Saskatchewan, Canada

Department of Materials Engineering
Indian Institute of Science
&
Brahm Prakash Chair

Speaker & Affiliation: Prof. Jerzy Antoni Szpunar
Department of Mechanical Engineering, University of Saskatchewan
57 Campus Drive, Saskatoon, Saskatchewan, S7N 5A9, Canada Canada

Title: “Microstructural design for improvement of hydrogen generation and storage”

Date & Time: Wednesday 22nd February 2017, 3:30 PM

Venue: Lecture Theatre, Materials Engineering

ABSTRACT
Hydrogen has been recognized as a clean and sustainable fuel. However
still many problems have to be to be solved in area of generation,
transport and storage of this fuel for future hydrogen based economy to be
realized. Reaction of water with activated aluminum powder is consider as
one of the methods to generate hydrogen. The reaction produces also
aluminum hydroxide (Al(OH) 3 or AlOOH) as the byproduct; these compounds
change to alumina (Al2O3) after calcination process, and alumina can
produce aluminum. Hydrogen production rate can be increased if effective
surface area of aluminum exposed to oxidation is increased. Ball milling
process is considered as a method that remarkably changes the
microstructure of morphology of aluminum hydroxides and can produce
submicron or nano-size particles. We found that microstructural refinement
can be used to promote the reaction and allow increasing the production of
hydrogen. The addition of water soluble salts (potash or salt) also allow
to increase the oxidation rate and hydrogen generation. However, we
discovered that presence of salt had much smaller influence than
microstructural modifications. The traditional shrinking core model was
modified to explain the kinetics of the reaction between aluminum
particles and the fluid.

The storage of hydrogen will also require structural modification of the
storage system. One of storage system that was developed by us will be
discussed. We designed a Pd-graphene composite for hydrogen storage with
spherical shaped nanoparticles of 45 nm size homogeneously distributed
over a graphene substrate. This new hydrogen storage system has attractive
features like high gravimetric density, ambient conditions of hydrogen
charge and low temperature of the hydrogen discharge. The palladium
particles produce a low activation energy barrier to dissociate hydrogen
molecules These Pd particles, have to be nano-size and homogeneously
dispersed on the graphene surface, to serve as efficient hydrogen
receptors and further facilitate a dissociation and diffusion of hydrogen
and storagege in graphene via a spillover process. The hydrogen storage
capacity in such a combined metal-graphene system could be significantly
increased compared to storage in graphene or in metal. In this project, we
optimized the structure of Pd/graphene to allows a hydrogen uptake at
ambient conditions and discharging of hydrogen at low temperature. In
particular, with hydrogen charging pressure of 60 bar, the Pd/graphene
composite system with a Pd loading amount of 1 at. % captures 10.11 wt. %
of hydrogen.

CANADA RESEARCH CHAIR IN ADVANCED MATERIALS FOR CLEAN ENERGY

Professor Jerzy A. Szpunar, D.Sci, Ph.D., E. Eng.
Canada Research Chair Tier I Professor of Materials Science
Department of Mechanical Engineering, University of Saskatchewan
jerzy.szpunar@usask.ca

Short Biography
J.A. Szpunar, a professor of Materials Science at University of
Saskatchewan, was educated in Poland and received his PhD and D.Sc.
degrees from the Academy of Mining and Metallurgy in Cracow. He has held
various visiting positions in at Sussex and Durham Universities in
England, worked in laboratories of the Finish Academy of Science, Riso
National Laboratories and held visiting professor positions in Seoul
National University, Queens University, Tohoku University, Osaka
University and Bangalore Institute of Science and Technology. He also
served as an adviser to the National Atomic Agency Research Center in
Bandung, Indonesia and International Atomic Energy Agency in Vienna.
During 22 years he has been Professor of Materials Science and Henry
Birk’s Chair in Metallurgy at McGill University. During his time, at
McGill, he founded the “Textures & Microstructure Laboratory”, recognized
as a leading world center of microstructural research. During his years at
McGill, 30 Ph.D. students and 15 MSc. students graduated under his
supervision. He was a leader of 49 major research projects – mostly
materials related investigations.
Dr. Szpunar joined the Department of Mechanical Engineering at the
University of Saskatchewan in August 2009 as Tier I Canada Research Chair
in Advanced Materials for Clean Energy and his present research is mainly
related to materials for Generation IV nuclear reactors, hydrogen
generation and storage and novel techniques to support clean energy
programs. His overall research interests extend to various areas of
materials related investigations. His research interest spans various
areas of materials related investigations. In particular he is interested
in deformation and recrystallization processes in textured metals,
structure and properties of thin films, electronic interconnects, high
temperature oxidation and corrosion, synergy of wear and corrosion,
application of X-ray and neutron diffraction, structure of grain
boundaries and other interfaces, intergranular fracture, hydrogen
membranes and hydrogen ingress in nuclear materials, superplasticity and
special properties of nanocrystalline materials His group is also active
in the area of computer simulation of structure and properties of
engineering materials. The simulation based research is done on various
levels: atomistic, microscopic and macroscopic; Ab-Initio, Molecular
Dynamics and Monte Carlo are used to predict macroscopic properties of
materials and to understand various processes that transform texture,
grain boundary structure and properties. At University of Saskatchewan he
build important research laboratory and supervise 20-30 students and HQP
researchers.
Professor J.A. Szpunar is the author and co-author of over 900 research
papers (530 journal publications.

25 Jan 2017 @ 3pm : Colloquium on structural and electronic properties of materials

Dear All,

Department of Materials Engineering will host a colloquium on structural and electronic properties of materials on 25th January 2017. The presentations will be given by professor and scientists from Karlsruhe Institute of Technology (KIT), Germany. The details of speakers, lecture titles and timetable of the colloquium program are provided below.

Speakers: Prof. Horst Hahn, Dr. Robert Kruk, Dr. Ralf Witte and Dr. Alan Molinari

Venue: Materials Engineering Lecture Theatre

Time: 3-4:30 P.M

15:00-15:10 : Introduction by Horst Hahn

15:10-15:30 : Novel crystalline and glassy structures by Horst Hahn

15:30-15:50 : Tuning of properties of nanostructures by Robert Kruk

15:50-16:10 : Tailoring magnetic properties by epitaxial growth by Ralf Witte

16:10:16:30 : Tuning of magnetic properties of epitaxial thin films via electrolyte gating by Alan Molinari

Tea and Snacks: 4.30 PM

ALL ARE CORDIALLY INVITED

2 Jan 2017 @ 3pm – Seminar by Dr. Surojit Gupta, University of North Dakota, USA

Department of Materials Engineering, Indian Institute of Science
&
ASM International – Bangalore Chapter, and Indian Institute of Metals -Bangalore Chapter

Speaker & Affiliation : Dr. Surojit Gupta, ASM-IIM Lecturer and Assistant Professor
Department of Mechanical Engineering, University of North Dakota, Grand Forks, ND, USA

Title :“Green Manufacturing”

Date & Time : Monday 2nd January 2017, 3:00 PM

Venue : Lecture Theatre, Materials Engineering

High Tea at 4:00 P.M.

ALL ARE WELCOME

20 Dec 2016 @ 11am – Seminar by Dr. Surya R. Kalidindi Brahm Prakash Visiting Chair

Speaker & Affiliation :Dr. Surya R. Kalidindi, George W. Woodruff School of Mechanical Engineering, Georgia Institute of, Technology, Atlanta, Georgia, GA,USA,
&
Brahm Prakash Visiting Chair Professor, Department of Materials Engineering, Indian Institute of Science, Bangalore

Title :“Spherical Nanoindentation Stress-Strain Curves”

Date & Time : Tuesday, 20th December 2016, 11:00 AM

Venue : Lecture Theatre, Materials Engineering