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Brief Profile of the Awardee


Dr Aloke Paul

  • 2017
  • Engineering Sciences
  • 04/10/1973
  • Materials Engineering
Award Citation:

Dr Paul has made a paradigm shift in our understanding of multi component solid state diffusion that impacted the technological development of complex high performance alloys.

Academic Qualifications:
Thesis and Guide details:
Details of CSIR Fellowship/ Associateship held, if any or from other sources/ agencies.
Significant foreign assignments:
(a) Significant contributions to science and/ or technology development by the nominee based on the work done in India during most part of last 5 years:
The understanding of highly complex diffusion processes in multicomponent material systems represent an unsolved area and a challenge to materials engineer due to lack of proper analytical techniques that can deal with these complexities. The candidate pioneered a way forward to address this important problem that is key to the development of new generation alloys and their reliabiity in actual engineerign applications. The development by the candidate in the last five years is outlined below in details. This is seeded by the discoveries of unknown phenomenon related to the Kirkendall effect in solid-state diffusion during the PhD work of Prof. Aloke Paul. During this work, experimental evidence was presented to show that the inert markers used for studying relative mobilities of the components can split into more than one plane. This led to development of several new models by different groups around the world bringing new insights to the phenomenological diffusion process. This is now part of gradute level course curriculum and incorporated in new books written on diffusion in solids (see Annexure 16h on further details of other reaserch accomplishments in Prof. Paul’s group). After joing the Indian Institute of Science, Prof Paul developed a physico-chemical (mathematical) model explaining spliiting of the Kirkendall markers and relating, for the first time, the microstructural evolution with relative mobilities of the componnets. This gives a new lease of life in the field of solid-state diffusion, following which one can study the materials in real applications without even using inert markers but just by analyizng the microstructure evolution in an interdiffusion zone. This also helps to study the exact role of external factors such as electric current and stress along with thermodynamic driving forces in multilayered thin films without using any inert marker to locate the Kirkendall plane, which remained a challenge for research engineers in electronics industry for several decades. This model is also discussed in the new book in this field (see Annexure 16h). In last five years, through a series of publications [1-4], Prof. Paul developed a new pseudo-binary approach for estimation of the diffusion coefficients in multicomponent systems and proposed an analyitcal framework to study diffusion controlled evolution of the product phases in multicomponnet inhomogeneous material in combination with previously developed physico-chemical model. This is important to understand the physicomecanical properties of complex material systems in various applications, as outlined below: [1] A. Paul, A pseudo-binary approach to study interdiffusion and the Kirkendall effect in multicomponent systems, Philosophical Magazine, 93 (2013) 2297-2315. [2] S. Santra and A. Paul, Estimation of intrinsic diffusion coefficients in a pseudo-binary diffusion couple, Scripta Materialia 103 (2015) 18-21. [3] P. Kiruthika and A. Paul, A pseudo-binary interdiffusion study in the β-Ni(Pt)Al phase, Philosophical Magazine Letters 95 (2015) 138-144 [4] P. Kiruthika, S.K. Makineni, C. Srivastava, K. Chattopadhyay, A.
(b) Impact of the contributions in the field concerned:
Ever since the first report of solid state diffusion in 1889, this field has witnessed significant growth but in terms of laying down the fundamentals and mechanisms for simple model systems. In the technological world, however, the simple model systems do not work as most often the important engineering alloys are multicomponent and inhomogeneous in nature. In the absence of a suitable theoretical framework to tackle diffusion parameters in multicomponent systems, at present there is an unbridgeable wide gap between groups dealing with the theory of diffusion and engineers involved in designing new material systems. The new powerful analytical framework developed by Prof. Paul’s group is capable of bridging this gap in physical metallurgy. For the first time, it provides a platform for meaningful interpretation of diffusion data obtained experimentally in technologically important multicomponent engineering alloys and correlates it with microstructural evolution. This breakthrough provides a useful link to understand structure-property correlations in complex engineering alloys from atomic to mesoscopic length scales. In view of the above, this new analytical framework is of great scientific and technological significance. Like previously developed other models by Prof. Paul’s group, this analytical method dealing with multicomponent diffusion is being accepted by the research community and expected to be incorporated in new books written on this topic.
Places where work of last 5 years has been referred/ cited in Books, Reviews:
(i). Paper Cited
(ii). Book Cited
Names of the industries in which the technology (ies) has (have) been used :
The achievements already been recognised by Awards by any learned body:
The Awardee a fellow of the Indian National Science Academy/Indian Academy of Sciences/National Academy of Sciences/Others:
The Awardee delivered invited lecture(s) in India/abroad and/or chaired any scientific Internatiional Conference Symposium:
List of Awardee's 10 most significant publications.
List of Awardee's 5 most significant publications during the last 5 years
List of Awardee's 5 most significant publications from out of work done in India during the last five years:
Complete list of publications in standard refereed journals:
Complete list of publications with foreign collaborators (indicating your status as author):
List of papers published in Conferences /Symposia/ Seminars, etc:
List of the most outstanding Technical Reports/ Review Articles:
Statement regarding collaboration with scientists abroad:
List of Patents taken
Total number of patents granted in last five years.
Details of Books published:

Contact Details

  • Department of Materials Engineering
    Indian Institute of Science
    CV Raman Road
    Bengaluru - 560012
    Karnataka INDIA
  • 080 2293 2259
  • 080 2360 0472
  • aloke[at]materials[dot]iisc[dot]ernet[dot]in
23 Oct 2017, http://ssbprize.gov.in/Content/Detail.aspx?AID=530