MANU HARILAL
@ajce.in
Assistant Professor- Grade II, Department of Metallurgical and Materials Engineering
Amal Jyothi College of Engineering
RESEARCH INTERESTS
Material Characterization
Marine concrete corrosion
Coatings and Surface modification
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Liya Roy, Sudha Uthaman, Manu Harilal, and Mini Mathew
Elsevier BV
Manu Harilal, R.P. George, Shaju.K. Albert, and John Philip
Elsevier BV
Manu Harilal, R. P. George, John Philip, and Shaju K. Albert
Springer Science and Business Media LLC
Divya Rachel Rooby, T. Nanda Kumar, Manu Harilal, S. Sofia, R.P. George, and John Philip
Elsevier BV
Manu Harilal, Deepak K. Kamde, Sudha Uthaman, R.P. George, Radhakrishna G. Pillai, John Philip, and Shaju.K. Albert
Elsevier BV
Manu Harilal, B. Anandkumar, B.B. Lahiri, R.P. George, John Philip, and Shaju K. Albert
Elsevier BV
Saikiran Amruthaluru, Siva Kumar Mamidi, Manu Harilal, Hariprasad Sampatirao, and Rameshbabu Nagumothu
Trans Tech Publications, Ltd.
The present work is aimed at the synthesis of fluorine substituted and carbonate substituted hydroxyapatites (FHA, CHA) by the mechanochemical method. The shortest milling time required for the synthesis of FHA and CHA using calcium hydroxide and diammonium hydrogen phosphate as precursors was estimated. In addition to the Ca and P precursors, ammonium carbonate and ammonium fluoride were used for carbonate and fluorine substitutions, respectively. Thermal stability of the synthesized FHA and CHA was evaluated. The phase composition and crystallite size were evaluated by the X-Ray Diffraction (XRD). Fourier Transform Infrared Spectroscopy (FTIR) technique was employed to confirm the functional groups corresponding to the FHA and CHA. Thermal stability of the FHA and CHA was determined by the XRD and FTIR studies on the FHA and CHA powders annealed at 900 °C. From the XRD and FTIR results, it is observed that the 30 min milling time is the shortest time for the complete formation of FHA and CHA. The powders synthesized with a minimum milling time of 30 min exhibited better thermal stability.
Sudha Uthaman, R.P. George, Vinita Vishwakarma, Manu Harilal, and John Philip
Elsevier BV
Manu Harilal, Sudha Uthaman, B. Anandkumar, B.B. Lahiri, R.P. George, John Philip, and G. Amarendra
Elsevier BV
Manu Harilal, Sudha Uthaman, R.P. George, B. Anandkumar, C. Thinaharan, John Philip, and U. Kamachi Mudali
Wiley
This study reports the anti‐bacterial properties of green concrete containing fly ash, nanoparticle modifiers, and a corrosion inhibitor. Four different concrete specimens, namely control concrete containing ordinary portland cement (CC), fly ash concrete containing 40 wt % fly ash (CF), modified fly ash concrete containing nano‐TiO2 and nano‐CaCO3 (1 wt % each) called CFN, and CFN with 2 wt % corrosion inhibitor (CFNI) are used in the present study. Among the four specimens exposed to microbial culture, CFNI showed minimal bacterial attachment and biofilm density, which is further corroborated from Epifluorescence microscopy and 3D confocal laser scanning microscopy. The CFNI specimens showed the least pH reduction among the four, which resulted in the enhanced microbial resistance. The results unambiguously confirm the synergetic effects of nanophase modifiers and NaNO2 based inhibitor in controlling microbial activity in concrete specimens. The results have promising applications in formulating concrete structures that are exposed to harsh environmental conditions. © 2018 American Institute of Chemical Engineers Environ Prog, 38:e13102, 2019
Manu Harilal, V.R. Rathish, B. Anandkumar, R.P. George, M.S. Haji Sheikh Mohammed, John Philip, and G. Amarendra
Elsevier BV
Manu Harilal, A. Saikiran, and N. Rameshbabu
Trans Tech Publications, Ltd.
Mechanochemical synthesis is a simple and effective method to prepare ceramic compounds with nanosize. The present work was aimed at investigating the application of the mechanochemical method to synthesize nanocrystalline hydroxyapatite (HA). The shortest milling time required for synthesizing HA, using Ca (OH)2 and (NH4)2HPO4 as precursor materials was also established. The synthesized samples were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM) to determine the phases evolved, functional groups present and to assess the size and morphology of the particles, respectively. Further, the thermal stability of the synthesized powders was investigated by heating to a temperature of 900 °C with a dwell time of 2 h. The broadening of the XRD peaks was used to find out the crystallite size and Williamson-Hall plots were used to estimate the lattice strain. The XRD and FTIR results demonstrated that the complete formation of the HA phase by mechanochemical method has started within a milling time of 30 min using Ca (OH)2 and (NH4)2HPO4 as precursors and the Ca/P ratio of the HA increased with increasing milling time. The TEM micrographs demonstrated that the HA particles are nanosized, non-spherical and highly agglomerated.
Hariprasad S., M. Ashfaq, Arunnellaiappan T., Manu Harilal, and Rameshbabu N.
Elsevier BV