Journal Articles
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Item Investigation on grinding wear behaviour of austempered ductile iron as media material during comminution of iron ore in ball mills(2011) Hebbar, R.An attempt has been made to assess the grinding wear behaviour of austempered ductile iron (ADI) as media material in comminution of Kudremukh haematite iron ore in a ball mill. Spheroidal graphite (S.G) iron balls were austenitised at 900°C for one hour and austempered at 280°C and 380°C for different time durations. These materials were characterized by measuring hardness, carrying out X-ray diffraction analysis, studying microstructures using scanning electron microscope (SEM). Grinding wear behaviour of ADI was assessed during wet grinding at different pH of the mineral slurry. The wear resistance of ADI was compared with that of forged En 31 steel balls under similar grinding conditions. It was found that ADI balls austempered at 280°C for 30 minutes which contains lower bainite registered superior wear resistance. It was also noted that the wear resistance of ADI was more at higher pH range of the slurry. © 2011 TIIM, India.Item (E)-1-(2,4-Dichlorophen-yl)-3-[3-(4-methoxyphenyl)-1-phenyl-1H-pyrazol-4- yl]prop-2-en-1-one(2011) Fun, H.-K.; Ching Kheng, C.K.; Malladi, S.; Hebbar, R.; Isloor, A.M.In the title molecule, C25H18Cl2N 2O2, the dihedral angles between the pyrazole ring and its N- and C-bonded benzene rings are 8.28 (11) and 40.89 (10)°, respectively. The dihedral angle between the benzene rings is 39.03 (11)°. The title molecule exists in a trans conformation with respect to the acyclic C=C bond. In the crystal, molecules are linked into inversion dimers by pairs of inter-molecular C - H?O hydrogen bonds, generating R2 2(14) loops. © Fun et al. 2011.