Mohan Muralikrishna Garlapati
@uni-muenster.de
Alexander von Humboldt Research Fellow, Institute of Materials Physics
University of Muenster
RESEARCH, TEACHING, or OTHER INTERESTS
Materials Science, Metals and Alloys, Materials Chemistry, Surfaces, Coatings and Films
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Baixue Bian, Lana Söltzer, G. Mohan Muralikrishna, Shabnam Taheriniya, Sandipan Sen, K.C. Hari Kumar, Sankaran S., Gerhard Wilde, and Sergiy V. Divinski
Elsevier BV
G. Mohan Muralikrishna, Sandipan Sen, Sai Kumaran Ayyappan, S. Sankaran, K. Guruvidyathri, Juliana Schell, Lukasz Rogal, Xi Zhang, Joachim Mayer, Blazej Grabowski,et al.
Elsevier BV
A. Carmel Mary Esther, G. Mohan Muralikrishna, Manohar Chirumamilla, Manoel da Silva Pinto, Stefan Ostendorp, Martin Peterlechner, Alexander Yu Petrov, Manfred Eich, Sergiy V. Divinski, Horst Hahn,et al.
Wiley
AbstractThe precise mechanism governing the reversible semiconductor‐to‐metal transition (SMT) in V2O5 remains elusive, yet its investigation is of paramount importance due to the remarkable potential of V2O5 as a versatile “smart” material in advancing optoelectronics, plasmonics, and photonics. In this study, distinctive experimental insights into the SMT occurring in amorphous V2O5 through the application of highly sensitive, temperature‐dependent, in situ analyses on a V2O5 thin film deposited on soda‐lime glass are presented. The ellipsometry measurements reveal that the complete SMT occurs at ≈340 °C. Remarkably, the refractive index and extinction coefficients exhibit reversible characteristics across visible and near‐infrared wavelengths, underscoring the switch‐like behavior inherent to V2O5. The findings obtained from ellipsometry are substantiated by calorimetry and in situ secondary ion mass spectrometry analyses. In situ electron microscopy observations unveil a separation of oxidation states within V2O5 at 320 °C, despite the thin film retaining its amorphous state. The comprehensive experimental investigations effectively demonstrate that alterations in electronic state can trigger the SMT in amorphous V2O5. It is revealed for the first time that the SMT in V2O5 is solely contingent upon electronic state changes, independent of structural transitions, and importantly, it is a reversible transformation within the amorphous state itself.
Baixue Bian, Shabnam Taheriniya, G. Mohan Muralikrishna, Sandipan Sen, Christoph Gammer, Ingo Steinbach, Sergiy V. Divinski, and Gerhard Wilde
Elsevier BV
Devara Srinu, Yasam Palguna, G. M. Muralikrishna, Rajesh Korala, K. Srinivasa Rao, and N. R. M. R. Bharagava
Springer Science and Business Media LLC
B. Bian, S. Taheriniya, G. Mohan Muralikrishna, A. Godha, S.K. Makineni, S. Sankaran, B.B. Straumal, Y. Du, G. Wilde, and S.V. Divinski
Elsevier BV
A.K. Mohamed, V.V. Palacheva, V.V. Cheverikin, T.N. Vershinina, A.M. Balagurov, G.M. Muralikrishna, N. Esakkiraja, S.V. Divinski, G. Wilde, and I.S. Golovin
Elsevier BV
Rahul Bhattacharya, Murugesan Annasamy, Pavel Cizek, M. Kamaraj, G. Mohan Muralikrishna, Peter Hodgson, Daniel Fabijanic, and B. S. Murty
Springer Science and Business Media LLC
Nanocrystalline Al_ x CoCrFeNi ( x = 0, 0.3, 0.6, 1 mol) high-entropy alloys were synthesized by mechanical alloying (MA) and consolidated by spark plasma sintering (SPS). Single-phase face-centered cubic (FCC) structure was achieved with x = 0 and 0.3. Dual-phase body-centered cubic (BCC)/B2 + FCC structure was obtained in x = 0.6 and 1. Complete solid solution was achieved with a significantly reduced duration of MA (10 h) followed by a brief SPS leading to crystallite size of < 10 nm for MA powders and < 60 nm post-SPS. Incremental changes in Al content translate into increase of BCC + B2 phase fraction and alter the co-existing FCC phase composition consequently. Ni dominates FCC phase of CoCrFeNi and Al_0.3CoCrFeNi, whereas Fe dominates FCC phase of Al_0.6CoCrFeNi and AlCoCrFeNi. Carbon and Oxygen addition during milling process resulted in nanoscale dispersion of Cr_7C_3 carbide and Cr_2O_3 /Al_2O_3 post-SPS. The hardness of AlCoCrFeNi (730HV_0.3) was the highest among all MA-SPS alloys. Graphical abstract
Carmel Mary Esther Alphonse, Mohan Muralikrishna Garlapati, Bonnie J. Tyler, Heinrich F. Arlinghaus, Sergiy V. Divinski, and Gerhard Wilde
Wiley
Strongly confined NaVO+ segregation and its thermoresponsive functionality at the interface between simple sputter‐deposited amorphous vanadium oxide thin films and soda‐lime glass is substantiated in this work by in situ temperature‐controlled time‐of‐flight secondary‐ion mass spectrometry (ToF‐SIMS). The obtained ToF‐SIMS depth profiles provide unambiguous evidence for a reversible transformation that causes systematic switching of the NaVO+/Na+ and Na+/VO+ intensities upon cycling the temperature between 25 and 340 °C. Subsequently, NaVO complexes are found to be reversibly formed (at 300 °C) in vanadium oxide‐diffused glass, leading to thermoresponsive electrical behavior of the thin‐film glass system. This new segregation and diffusion‐dependent multifunctionality of NaVO+ point toward applications as an advanced material for thermoelectrical/optical switches, in smart windows or in thermal sensors.
Jingfeng Zhang, G. Mohan Muralikrishna, Alex Asabre, Yordan Kalchev, Julian Müller, Benjamin Butz, Sven Hilke, Harald Rösner, Guillaume Laplanche, Sergiy V. Divinski,et al.
Elsevier BV
G.M. Muralikrishna, B. Tas, N. Esakkiraja, V.A. Esin, K.C. Hari Kumar, I.S. Golovin, I.V. Belova, G.E. Murch, A. Paul, and S.V. Divinski
Elsevier BV
G. Mohan Muralikrishna, A. Carmel Mary Esther, K. Guruvidyathri, Philipp Watermeyer, Christian H. Liebscher, Kaustubh N. Kulkarni, Gerhard Wilde, Sergiy V. Divinski, and B. S. Murty
MDPI AG
For the first time, multicomponent alloys belonging to a B2-ordered single phase were designed and fabricated by melting route. The design concept of high entropy alloys is applied to engineering the transition metal sublattice of binary B2 aluminide. The equiatomic substitution of transition metal elements in the Ni sublattice of binary AlNi followed to produce Al(CoNi), Al(FeNi), Al(CoFe), Al(CoFeNi), Al(CoFeMnNi), and Al(CoCuFeMnNi) multicomponent alloys. CALculation of PHAse Diagrams (CALPHAD) approach was used to predict the phases in these alloys. X-ray diffraction and transmission electron microscopy were used to confirm the B2 ordering in the alloys. Thermal stability of the B2 phase in these alloys was demonstrated by prolonged heat treatments at 1373 K and 1073 K up to 200 h.
G. Mohan Muralikrishna, Vladimir A. Esin, Kaustubh N. Kulkarni, B.S. Murty, Gerhard Wilde, and Sergiy V. Divinski
Elsevier BV
V. Pamidi, G. Mohan Muralikrishna, S. Bhogi, K. Georgy, B. Muduli, F. García-Moreno, and M. Mukherjee
Elsevier BV
Mohan Muralikrishna Garlapati, Mayur Vaidya, Anirudha Karati, Soumyaranjan Mishra, Rahul Bhattacharya, and B.S. Murty
Elsevier BV
Mohan Muralikrishna G., Mayur Vaidya, B.S. Murty, Sergiy V. Divinski, and Gerhard Wilde
Elsevier BV
Rahul John, Anirudha Karati, Mohan Muralikrishna Garlapati, Mayur Vaidya, Rahul Bhattacharya, Daniel Fabijanic, and B. S. Murty
Springer Science and Business Media LLC
Mayur Vaidya, Garlapati Mohan Muralikrishna, and Budaraju Srinivasa Murty
Springer Science and Business Media LLC
Mechanical alloying (MA) followed by sintering has been one of the most widely adopted routes to produce nanocrystalline high-entropy alloys (HEAs). Enhanced solid solubility, room temperature processing, and homogenous alloy formation are the key benefits provided by MA. Spark plasma sintering has largely been used to obtain high-density HEA pellets from milled powders. However, there are many challenges associated with the production of HEAs using MA, which include contamination during milling and high propensity of oxidation. The present review provides a comprehensive understanding of various HEAs produced by MA so far, with the aim to bring out the governing aspects of phase evolution, thermal stability, and properties achieved. The limitations and challenges of the process are also critically assessed with a possible way forward. The paper also compares the results obtained from high-pressure torsion, another severe plastic deformation technique.
Mohan B. Ponnuchamy, G. Mohan Muralikrishna, Venkateswara Rao Mannava, and G. Srinivas Reddy
Elsevier BV
Vikrant Trivedi, Manjusha Battabyal, Priyadarshini Balasubramanian, G. Mohan Muralikrishna, Pawan Kumar Jain, and Raghavan Gopalan
Royal Society of Chemistry (RSC)
The thermoelectric properties of nanostructured Ni doped Dy filled CoSb3skutterudites (Dy0.4Co4−xNixSb12(x= 0, 0.4, and 0.8)) have been reported.