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| 1 | Reaction kinetics modeling for lithium and cobalt recovery from spent lithium-ion batteries using acetic acid显示文摘Lithium and cobalt recovery from spent lithium-ion batteries(LIBs) is a major focus because of their increased production and usage. The conventional method for recycling spent LIBs using inorganic acids produces harmful byproducts. In this work, the leaching agent was substituted with a less expensive and more environmentally friendly alternative—acetic acid—and a mathematical model was developed to describe the kinetics of the recovery process. The variables used were the pH value, temperature, H_2O_2 concentration, and the solid-to-liquid(S/L) ratio. The mathematical model used was the shrinking core model, which was modified to accommodate an equilibrium reaction. The experimental results show that the rate of recovery of Li and Co over time was only affected by temperature. The leaching behaviors of Li and Co were found to oppose each other. An increase in temperature resulted in increased recovery of Li but decreased recovery of Co because of the product-favoring endothermic reaction of Li and the reactant-favoring exothermic reaction of Co. The product of Li has a lower entropy value than the reactant as a free-moving ion, whereas the product of Co leaching has a higher entropy value as a stiff crystal complex. Thus, temperature conditioning is a pivotal factor in the leaching of spent LIBs. | Hendrik Setiawan Himawan Tri Bayu Murti Petrus Indra Perdana | 2019 | International Journal of Minerals,Metallurgy and Materials2019，26，1： | 9 |
| 2 | Microstructure and texture evolution in AZ31 magnesium alloy during caliber rolling at different temperatures显示文摘Magnesium alloy AZ31 was caliber rolled at different temperatures viz.523K,573K,623K,673K and 723K imposing a total cumulative reduction of 92%and a cumulative strain of 2.6.The associated microstructure and texture evolution were studied using Electron Back Scattered Diffraction(EBSD)and X-ray macro-texture observations respectively.Grain refinement was observed in all the caliber rolled bars indicating the occurrence of dynamic recrystallization.Asymmetry parameter and texture index were used to study the evolution of texture.Near doubling of the yield strength at room temperature was observed by caliber rolling at a temperature of 573K.The improvement in mechanical properties was explained on the basis of the fine grain microstructures and suitable development of crystallographic texture.Based on the present study,warm caliber rolling can be used as a good production method for obtaining long bars of high strength magnesium alloy AZ31. | Abhishek Tripathi S.V.S.Narayana Murty P.Ramesh Narayanan | 2017 | Journal of Magnesium and Alloys2017，5，3： | 7 |
| 3 | Effects of caliber rolling on microstructure and room temperature tensile properties of Mge3Ale1Zn alloy显示文摘Mge3Ale1Zn(AZ31)alloy was caliber rolled isothermally in the temperature range of 250e450C to develop fine grains of 3.6e12.5 mm.The stressestrain curves obtained from tensile tests at room temperature were found to vary with the temperature employed in caliber rolling.Maximum tensile strength of 290 MPa and ductility of 13.5%were obtained upon caliber rolling at 300C as compared to 188 MPa and 15.2%,respectively,in the mill-rolled condition.The variations in tensile properties are explained by the concomitant grain size,texture and twins obtained as a function of caliber rolling temperature. | R.L.Doiphode S.V.S.Narayana Murty N.Prabhu B.P.Kashyap | 2013 | Journal of Magnesium and Alloys2013，1，2： | 7 |
| 4 | Ozone Profile Retrieval from Satellite Observation Using High Spectral Resolution Infrared Sounding Instrument显示文摘This paper presents a preliminary result on the retrieval of atmospheric ozone profiles using an im- proved regression technique and utilizing the data from the Atmospheric InfraRed Sounder (AIRS), a hyper-spectral Instrument expected to be flown on the EOS-AQUA platform in 20D2. Simulated AIRS spectra were used to study the sensitivity of AIRS radiance on the tropospheric and stratospheric ozone changes, and to study the impact of various channel combinations on the ozone profile retrieval. Sensitivity study results indicate that the AIRS high resolution spectral channels between the wavenumber 650- 800 cm-1 provide very useful information to accurately retrieve tropospheric and stratospheric ozone pro- files Eigenvector decomposition of AIRS spectra indicate that no more than 100 eigenvectors are needed to retrieve very accurate ozone profiles. The accuracy of the retrieved atmospheric ozone profile from the pres- ent technique and utilizing the AIRS data was compared with the accuracy obtained from current Advanced TIROS Operational Vertical Sounder (ATOVS) data aboard National Oceanic and Atmospheric Admini- stration (NOAA) satellites As expected, a comparison of retrieval results confirms that the ozone profile re- trieved with the AIRS data is superior to that of | Yanni Qu, Mitchell D. Goldberg and Murty Divakarla Research and Data System Corporation, 7833 Walker Dr Greenbelt. MD 20770 National Eivironment Satellite Data and Information Service, Office of Research and Application, World Weather Building. 5200 Auth | 2001 | Advances in Atmospheric Sciences2001，18，5： | 5 |
| 5 | α→β Transformation characteristics revealed by pulsed laser-induced non-equilibrium microstructures in duplex-phase Zr alloy显示文摘Microstructures of a duplex-phase Zr-2.5Nb alloy treated by pulsed laser were characterized by electron backscatter diffraction(EBSD) and electron channeling contrast(ECC) imaging techniques.Major attention has been paid to non-equilibrium hybrid microstructure consisting of both prior a and β phases,and a plates transformed from new β phases to probe α→β transformation characteristics in the alloy.The origin of the hybrid microstructure is attributed to the specific thermodynamic conditions induced by the pulsed laser treatment.ECC observation shows that newly formed β phases during laser heating prefer to nucleate and grow at the expense of edges of prior a grains rather than their interiors.EBSD analyses further reveal that orientations of the new βphases are not determined by the prior a grains according to the Burgers relationship but maintain those of the prior β phases in an epitaxial growth way. | CHAI LinJiang WANG Shu Yan WU Hao GUO Ning PAN HuCheng CHEN Liang Yu MURTY K.L. SONG Bo | 2017 | Science China(Technological Sciences)2017，60，8： | 5 |
| 6 | Data clustering显示文摘 | A. K. Jain M. N. Murty P. J. Flynn | 1999 | ACM Computing Surveys (CSUR)1999，，3： | 5 |
| 7 | Metallurgical analysis of a failed maraging steel shear screw used in the band separation system of a satellite launch vehicle显示文摘Maraging steels have excellent combination of strength and toughness and are extensively used for a variety of aerospace applications. In one such critical application, this steel was used to fabricate shear screws of a stage separation system in a satellite launch vehicle. During assembly preparations, one of the shear screws which connected the separation band and band end block has failed at the first thread. Microstructural analysis revealed that the crack originated from the root of the thread and propagated in an intergranular mode. The failure is attributed to combined effect of stress and corrosion leading to stress corrosion cracking. | S.V.S. Narayana MURTY Sushant K. MANWATKAR E Ramesh NARAYANAN | 2016 | Defence Technology(防务技术)2016，12，5： | 5 |
| 8 | Catharanthus roseus:a natural source for the synthesis of silver nanoparticles显示文摘Objective:To develop a simple rapid procedure for bioreduction of silver nanoparticles(AgNPs)using aqueous leaves extracts of Catharanthus roseus(C.roseus).Methods:Characterization were determined by using UV-Vis spectrophotometry,scanning electron microscopy(SEM),energy dispersive X-ray and X-ray diffraction.Results:SEM showed the formation of silver nanoparticles with an average size of 67 nm to 48 nm.X-ray diffraction analysis showed that the particles were crystalline in nature with face centered cubic geometry.Conclusions:C.roseus demonstrates strong potential for synthesis of silver nanoparticles by rapid reduction of silver ions(Ag^+ to Ag^0).This study provides evidence for developing large scale commercial production of value-added products for biomedical/nanotechnology-based industries. | Mukunthan KS Elumalai EK Trupti N Patel V Ramachandra Murty | 2011 | Asian Pacific Journal of Tropical Biomedicine2011，1，4： | 4 |
| 9 | Effect of Diffuser Vane Shape on the Performance of a Centrifugal Compressor Stage显示文摘The present paper reports the results of experimental investigations on the effect of diffuser vane shape on the performance of a centrifugal compressor stage.These studies were conducted on the chosen stage having a backward curved impeller of 500 mm tip diameter and 24.5 mm width and its design flow coefficient is Фd=0.0535.Three different low solidity diffuser vane shapes namely uncambered aerofoil,constant thickness flat plate and circular arc cambered constant thickness plate were chosen as the variants for diffuser vane shape and all the three shapes have the same thickness to chord ratio(t/c=0.1).Flow coefficient,polytropic efficiency,total head coefficient,power coefficient and static pressure recovery coefficient were chosen as the parameters for evaluating the effect of diffuser vane shape on the stage performance.The results show that there is reasonable improvement in stage efficiency and total head coefficient with the use of the chosen diffuser vane shapes as compared to conventional vaneless diffuser.It is also noticed that the aero foil shaped LSD has shown better performance when compared to flat plate and circular arc profiles.The aerofoil vane shape of the diffuser blade is seen to be tolerant over a considerable range of incidence. | T Ch Siva Reddy GV Ramana Murty MVSSSM Prasad | 2014 | Journal of Thermal Science2014，23，2： | 4 |
| 10 | Grain growth in calibre rolled Mg-3Al-1Zn alloy and its effect on hardness显示文摘Calibre rolling of Mg-3Al-1Zn alloy at 300℃ led to development of fine grain size of 3μm.Subsequent annealing,from 5 to 6000 minutes at 300-450℃,revealed faster grain growth initially up to 60 minutes,which became sluggish on prolonged annealing.The time exponent for grain growth kinetics(n)suggests bi-linear behaviour with n=0.11 and 0.008 over these time scales.The activation energy,based on various n values,varied over wide ranges that made the understanding of the mechanisms for grain growth difficult.This problem is explained by concurrent evolution of texture and grain boundary structure.The effect of grain growth on hardness at ambient temperature was found to follow the H-P type relationship. | R.L.Doiphode S.V.S.Narayana Murty N.Prabhu B.P.Kashyap | 2015 | Journal of Magnesium and Alloys2015，3，4： | 4 |
| 11 | Cloning and Genomic Organization of Beclin 1, a Candidate Tumor Suppressor Gene on Chromosome 17q21显示文摘 | Vincent M. Aita Xiao Huan Liang V.V.V.S. Murty David L. Pincus Weiping Yu Eftihia Cayanis Sergei Kalachikov T.Conrad Gilliam Beth Levine | 1999 | Genomics1999，，1： | 3 |
| 12 | An improved analytical model of 4H-SiC MESFET incorporating bulk and interface trapping effects显示文摘An improved analytical model for the current–voltage(I–V) characteristics of the 4H-SiC metal semiconductor field effect transistor(MESFET) on a high purity semi-insulating(HPSI) substrate with trapping and thermal effects is presented. The 4H-SiC MESFET structure includes a stack of HPSI substrates and a uniformly doped channel layer. The trapping effects include both the effect of multiple deep-level traps in the substrate and surface traps between the gate to source/drain. The self-heating effects are also incorporated to obtain the accurate and realistic nature of the analytical model. The importance of the proposed model is emphasised through the inclusion of the recent and exact nature of the traps in the 4H-SiC HPSI substrate responsible for substrate compensation.The analytical model is used to exhibit DC I–V characteristics of the device with and without trapping and thermal effects. From the results, the current degradation is observed due to the surface and substrate trapping effects and the negative conductance introduced by the self-heating effect at a high drain voltage. The calculated results are compared with reported experimental and two-dimensional simulations(Silvacor-TCAD). The proposed model also illustrates the effectiveness of the gate–source distance scaling effect compared to the gate–drain scaling effect in optimizing 4H-SiC MESFET performance. Results demonstrate that the proposed I–V model of 4H-SiC MESFET is suitable for realizing SiC based monolithic circuits(MMICs) on HPSI substrates. | M.Hema Lata Rao N.V.L.Narasimha Murty | 2015 | Journal of Semiconductors2015，36，1： | 3 |
| 13 | 工业用纯钛等径角挤压的显微组织控制方法综述(英文)显示文摘综述了工业用纯钛(CP-Ti)大塑性变形技术的等径角挤压工艺,主要集中在等径角挤压参数的影响,包括通道角和曲率角、挤压路径、挤压温度、挤压速度、内部产热、挤压道次和背压。为了获得CP-Ti的最大均匀性、晶粒细化和提高力学性能,对不同等径角挤压CP-Ti进行了表征,如显微组织、应力不均匀性和力学性能。研究表明,在挤压温度为450°C,挤压速度为1-3 mm/s,挤压路径为BC,加载背压,通道角和曲率角分别为90°和20°的条件下能获得最均匀的超细组织。 | Peiman Shahbeigi Roodposhti Nasim Farahbakhsh Apu Sarkar Korukonda Linga Murty | 2015 | Transactions of Nonferrous Metals Society of China2015，25，5： | 3 |
| 14 | Thermally annealed gamma irradiated Ni/4H-SiC Schottky barrier diode characteristics显示文摘Thermal annealing effects on gamma irradiated Ni/4 H-SiC Schottky barrier diode(SBD) characteristics are analyzed over a wide range of temperatures(400–1100 °C). The annealing induced variations in the concentration of deep level traps in the SBDs are identified by thermally stimulated capacitance(TSCAP). A little decrease in the trap density at E_C – 0.63 eV and E_C –1.13 eV is observed up to the annealing temperature of 600 °C. Whereas, a gamma induced trap at E_C – 0.89 eV disappeared after annealing at 500 °C, revealing that its concentration(< 1013 cm-3) is reduced below the detection limit of the TSCAP technique.The electrical characteristics of irradiated SBDs are considerably changed at each annealing temperature. To understand the anomalous variations in the post-annealing characteristics, the interface state density distribution in the annealed SBDs is extracted.The electrical properties are improved at 400 °C due to the reduction in the interface trap density. However, from 500 °C, the electrical parameters are found to degrade with the annealing temperature because of the increase in the interface trap density.From the results, it is noted that the rectifying nature of the SBDs vanishes at or above 800 °C. | P.Vigneshwara Raja N.V.L.Narasimha Murty | 2019 | Journal of Semiconductors2019，40，2： | 2 |
| 15 | Decomposition in multi-component AlCoCrCuFeNi high-entropy alloy显示文摘 | S. Singh N. Wanderka B.S. Murty U. Glatzel J. Banhart | 2010 | Acta Materialia2010，，1： | 2 |
| 16 | Data clustering:a review显示文摘 | JAIN A K MURTY M N FLYNN P J | 1999 | AGM Computing Surveys1999，31，3： | 2 |
| 17 | Storage space allocation in container terminals显示文摘 | Chuqian Zhang Jiyin Liu Yat-wah Wan Katta G Murty Richard J Linn | 2003 | Transportation Research Part B2003，，10： | 2 |
| 18 | Studies on Recovery Efficiencies of Phenols from Phenol Fraction Using Alkali Treatment显示文摘 | S. Aruna Kumari Goruganthula Venkata Subrahmanya Sarma G. M. J. Raju J. V. S. Murty C. BhaskaraSarma | 2013 | Journal of Chemistry and Chemical Engineering2013，7，4： | 2 |
| 19 | Microstructural characterization and corrosion behavior of multipass friction stir processed AA2219 aluminium alloy显示文摘 | K. Surekha B.S. Murty K. Prasad Rao | 2008 | Surface & Coatings Technology2008，，17： | 2 |
| 20 | An overview of sustainability assessment methodologies显示文摘 | Rajesh Kumar Singh H.R. Murty S.K. Gupta A.K. Dikshit | 2008 | Ecological Indicators2008，，2： | 2 |
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