Abhishek Tewari | Department of Mechanical Engineering

Profile

Abhishek Tewari
Abhishek
Tewari
Assistant Professor
Department of Mechanical Engineering
School of Engineering (SoE)
C-121L, Shiv Nadar University
Uttar Pradesh
India
+91-0120-7170100
Extn: 
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Profile Summary 

My research focuses on computational material science. I apply multiscale materials simulation methods to study the processing-structure-property relationship in materials, specifically ceramic materials. I have worked on transparent oxide ceramics (alumina), Si semiconductors and thermal barrier coatings during my academic and professional research career. Currently, I am working on oxide thermoelectric materials. We will be studying the nanostructuring mechanisms for hierarchical phonon scattering in oxide ceramics to reduce their thermal conducitivity. We use multiscale simulation methods such as, molecular dynamics, kinetic Monte Carlo, free energy minimization etc. for exploring the materials properties.

Educational Qualifications 
2013
Ph.D.
Ecole Polytechnique Federale de Lausanne (EPFL), Switzerland
2009
M.Tech.
Indian Institute of Technology, Kanpur
2007
B.Tech.
Indian Institute of Technology, Kanpur
Work Experience 
04/19Present
Assistant Professor,
Shiv Nadar University,
UP, India
I currently work here
03/17
08/18
Head, Technical Sales,
COMSOL Multiphysics,
Bengaluru
10/15
02/17
Principal Engineer,
GLOBALFOUNDRIES,
Bengaluru
03/15
09/15
Senior Engineer,
GLOBALFOUNDRIES,
Singapore
12/13
11/14
Postdoc,
EPFL,
Switzerland
Teaching & Research Interests: 

Phonon Scattering in Oxide Thermoelectric Materials: As we know, low thermal conductivity is required for improving thermoelectric figure of merit (ZT) of oxide thermoelectric materials such as, ZnO, SrTiO3 etc. Nanostructuring techniques are used to effectively scatter phonons without affecting the electrical properties. In this project we will use atomistic modeling methods (Molecular Dynamics along with Lattice Dynamics) to study the role of multiscale nanostructuring mechanisms such as, grain boundaries, nano inclusions and point defects on hierarchical phonon scattering in oxide thermoeletric materials. 

Surface Adsorption of Polymer Dispersants: Polymer dispersants such as poly-acrylic acid (PAA) are used in the colloidal processing of ceramic nanopowders. Polymer dispersants augments in the colloidal stability through steric forces. In this work we will use MD method to study the adsorption behavior of polymer dispersants on alumina surfaces. We will calculate adsorption energy and observe the adsorbed conformation of polymer molecules on different alumina surfaces.

Other areas of Interest: Structural and Functional Ceramics, Oxide Ceramics, Semiconductor Processing, Thermal Barrier Coatings, Tribology.

Courses Taught(Selected) 
Awards(Selected): 
2009

Felix scholarship for graduate studies at University of Oxford (Not availed)

2009

Best outgoing sportsperson of the year awarded by Students' Gymkhana, IIT Kanpur.

Scholarly Activity

Journal Publications (accepted or published)

Google Scholar: https://goo.gl/P8ZBBN

  1. A Tewari, P Bowen, “Grain boundary Complexion and Transparent Polycrystalline Alumina from an Atomistic Simulation Perspective”, Current Opinion in Solid State and Materials Science 20 (2016), 278-285 .
  2. M Michálek, A Tewari, G Blugan, P Bowen, H Hofmann, T Graule, J Kuebler, “New Approach to Low Thermal Conductivity of Thermal Barrier Protection with improved mechanical integrity”, Ceramics International 42 (2016), 6817-24.
  3. A Tewari, F Nabiei, S C Parker, M Cantoni, M Stuer, P Bowen, C Hébert, “Towards Knowledge Based Grain Boundary Engineering of Transparent Polycrystalline Alumina Combining Advanced TEM and Atomistic Modeling”, Journal of the American Ceramic Society 98 (2015), 1959-64.
  4. A Tewari, U Aschauer, P. Bowen, "Atomistic modeling of effect of Mg on oxygen vacancy diffusion in α-alumina“, Journal of the American Ceramic Society 97 (2014), 2596-2601.
  5. A Tewari, F. Nabiei, M Cantoni, P Bowen, C Hebert, "Segregation of anion (Clˉ) impurities at transparent polycrystalline α-alumina interfaces“, Journal of the European Ceramic Society 34 (2014), 3037-45.
  6. A Tewari, "Load dependence of oxidative wear in metal/ceramic tribocouples in fretting environment“, WEAR 289 (2012), 95-103.
  7. A Tewari, S Galmarini, M Stuer, P Bowen, "Atomistic modelling of the effect of codoping on the atomistic structure of interfaces in α-alumina“, Journal of the European Ceramic Society 32 (2012), 2935-48.
  8. F Bondioli, V Cannillo, A M Ferrari, A Tewari, "Synthesis and thermal stability of hydroxyapatite-coated zirconia nanocomposite powders“, Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry 42 (2012), 128-134.
  9. S Galmarini, U Aschauer, A Tewari, Y Aman, C Van Gestel, P Bowen, "Atomistic modelling of dopant segregation in α-alumina ceramics: coverage dependent energy of segregation and nominal dopant solubility“, Journal of the European Ceramic Society 31 (2011), 2839-2852.
  10. A Tewari, B Basu, R Bordia, "Model for fretting wear of brittle ceramics“, Acta Materialia 57 (2009), 2080-87.
  11. A Dubey, S D Gupta, R Kumar, A Tewari, B Basu, “Time constant determination for electrical equivalent of biological cells”, Journal of Applied Physics 105 (2009), 084705-1-8.