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Adelfa:a futuristic biodiesel fuel for DI diesel engines:a comparative experimental investigation

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Chinese Science Bulletin 2014年第9期59卷 924-930页

作者： A.R.Pradeep kumar k.annamalai S.R.Premkartikkumar Department of Automobile Engineering Anna University MIT Campus Chennai India

Biodiesel fuel is found to be a promising alternative for the petroleum diesel based on the results published by the researchers for a *** fuel is renewable and non degradable *** countries use biodiesel fuel for automotives to meet the crisis due to the depletion of the petroleum fuel and to meet the stringent emission norms Various researches have been carried out with different biodiesel fuels with vegetable oil as the source and appreciable results were *** biodiesel fuels which have been already tested are Jatropha,Pongamia,Mahua,neem,cotton seed,*** this experimental work,Adelfa biodiesel blend is used as the test *** emission and performance characteristics were compared with three other different biodiesel fuel *** results imply that Adelfa biodiesel(Nerium oil methyl ester)can be a futuristic biodiesel fuel,which has a good compatibility with the direct injection(DI)diesel engine without any major ***,Adelfa can be cultivated in a non agricultural land with fewer sources of *** is widely spread over all major countries of *** investigations have been carried out on a single cylinder DI diesel engine with standard engine *** this experimental work,various Adelfa biodiesel blends is compared with reference fuel(diesel)to choose the best blend which gives a closer performance to *** comparative analysis with other biodiesel fuels has also been done and results have been discussed.

关键词：直喷式柴油机生物柴油柴油燃料对比实验混合燃料排放标准石油燃料实验工作

Microstructure and mechanical properties of spark plasma-sintered La_(2)O_(3) dispersion-strengthened W-Ni-Fe alloy

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Rare Metals 2021年第8期40卷 2230-2236页

作者： Muthuchamy AyyappaRaj Digvijay Yadav Dinesh k.Agrawal Raja annamalai Arunjunai Rajan School of Mechanical Engineering VITVellore632014India Materials Research Institute University ParkPennsylvaniaPA16802USA Centre for Innovative Manufacturing Research VITVellore632014India

An investigation of lanthanum oxide(La_(2)O_(3))addition to tungsten heavy alloy(WHA)with a ternary composition of W-7 Ni-3 Fe was reported in this *** mixed powders were sintered using spark plasma sintering(SPS)***_(2)O_(3)was added in increments of 0.25 wt%,0.50 wt%,0.75 wt%and 1.00 wt%to WHA,*** sintered samples were characterized for microstructural evolution and mechanical *** influences of La_(2)O_(3)addition on density,grain size,hardness,ultimate tensile strength(UTS)and ductility on W-7 Ni-3 Fe system were discussed in this *** highest relative sintered density of 87.95%was obtained for 0.25 wt%La_(2)O_(3)addition to W-7 Ni-3 *** lowest grain size of 7.89μm was observed for 1.00 wt%La_(2)O_(3)***,the highest hardness and UTS of HV 533 and1110 MPa,respectively,were also obtained for the same *** electron microscopy(SEM)and energy-dispersive spectroscopy(EDS)of the samples revealed homogenous distribution of La_(2)O_(3)in the alloy *** of the sintered alloy samples revealed W-W intergranular fracture.

关键词： Tungsten heavy alloys Lanthanum oxide Spark plasma sintering Microstructure Mechanical properties

Fabrication and performance evaluation of dissimilar magnesium-aluminium alloy multi-seam friction stir clad joints

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Transactions of Nonferrous Metals Society of China 2017年第1期27卷 25-35页

作者： A.k.LAkSHMINARAYANAN V.E.annamalai Department of Mechanical Engineering SSN College of EngineeringKalavakkamChennai 603110Tamil NaduIndia

This investigation is aimed to establish empirical relationships between continuous multi-seam friction stir cladding process parameters （i.e., rotational speed, welding speed and shoulder overlap ratio） and the quality characteristics （bond tensile strength, shear strength and corrosion） of dissimilar magnesiurn-aluminium alloy clad joints. The influence of considered process parameters on the clad properties was reported. Furthermore, multi-criterion optimization procedure was used to obtain ideal processing conditions, which can yield higher interface strength and lower corrosion rate of fabricated composite plate. Results indicate that, the aluminium-rich thin continuous layer, Mg-rich irregular shaped regions consists of A13Mg2 and Al12Mg17 interraetallic compounds and nature of mechanical interlocking has great influence on the joint interface strength. On the other hand, the corrosion resistance of the clad joints is greatly affected by the amount of magnesium mixed with top aluminium sheet during friction stirring. Also, bend testing shows that, the cladded joints exhibit excellent ductility.

关键词： friction stir cladding dissimilar joint overlap ratio optimization

多孔CuCo_2S_4/石墨烯复合材料的合成及其在超级电容器上的应用（英文）

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新型炭材料 2016年第3期31卷 336-342页

作者：刘立乐 k.P.annamalai 陶有胜福州大学化学学院福建福州350108 中国科学院海西研究院中国科学院功能纳米结构设计与组装重点实验室福建福州350002

采用水热法合成了纳米带状多孔CuCo_2S_4/石墨烯复合材料,并通过扫描电镜、透射电镜、X-射线衍射、77 k氮气吸附等方法对其进行了表征分析。该复合材料具有0.7~1.2 nm微孔和2~10 nm介孔,其总孔容为0.1 cm^3·g^(-1)。电化学性能研究表明... 详细信息

采用水热法合成了纳米带状多孔CuCo_2S_4/石墨烯复合材料,并通过扫描电镜、透射电镜、X-射线衍射、77 k氮气吸附等方法对其进行了表征分析。该复合材料具有0.7~1.2 nm微孔和2~10 nm介孔,其总孔容为0.1 cm^3·g^(-1)。电化学性能研究表明,该材料应用于超级电容器具有良好的电化学储能性能。

关键词：石墨烯金属硫化物复合材料微孔介孔超级电容器

A Complete DFT, TD-DFT and Non-Linear Optical Property Study on 6-Amino-2-Methylpyridine-3-Carbonitrile

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Computational Chemistry 2017年第3期5卷 129-144页

作者： Durai Sakthi Madhu Prakasam annamalai Prakasam Santhanam Sivakumar Ponnusamy Munusamy Anbarasan Department of Physics Periyar University Salem India Centre for Nanoscience and Nanotechnology Periyar University Salem India Department of Physics Thiruvalluvar Government Arts College Rasipuram Namakkal India Department of Chemistry E.R.K. Arts & College Dharmapuri India

The optimized geometric structure and photophysical properties of 6-Amino-2-methylpyridine-3-carbonitrile dye have been studied by using Density Functional Theory (DFT). The lowest singlet excited state geometry optimized using Time-Dependent Density Functional Theory (TD-DFT). On the basis of ground and excited state geometries, the absorption spectra have been calculated using the DFT and TD-DFT method in gas phase and acetonitrile medium. To understand the Non-Linear Optical properties of 6-Amino-2-methylpyridine-3-carbonitrile dye, we computed dipole moment (μ), electronic polarizability (α), and first hyperpolarizability (β0) and second order hyperpolarizability (γ) using B3LYP density functional theory method in conjunction with 6-311++G(d) basis set.

关键词： Vibrational Spectra DFT Natural Bond Orbitals HOMO-LUMO Electronic and Absorption Spectra

Preparation of Nanoporous Sulfides/Graphene Composites for Lithium-ion Batteries

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Acta Geologica Sinica(English Edition) 2014年第S1期88卷 293-293页

作者： k.P.annamalai ZHENG Xiaoshuang GAO Jianping TAO Yousheng State key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences key Laboratory of design and assembly of functional nanostructures Chinese Academy of Sciences

Lithium-ion batteries(LIBs),with the use of sulfides as anode materials,are of research topic because of their high theoretical specific *** is promising for rechargeable energy storage because of their high energy

关键词： synthesis nanopore electrode graphene sulfur composite lithium battery

Seasonal variations of phytoplankton diversity in the Coleroon coastal waters,southeast coast of India

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Acta Oceanologica Sinica 2010年第5期29卷 97-108页

作者： Thillai Rajasekar k Rajkumar M SUN Jun Ashok Prabu V Perumal P Centre of Advanced Study in Marine Biology Annamalai University Tamil Nadu India Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Department of Biotechnology Periyar University Tamil Nadu India

The results of an investigation carried out during June 2005 to May 2007 on physico-chemical parameters,species composition and community structure of phytoplankton including Chlorophyll a（Chl-a） at the Coleroon coastal waters（Southeast coast of India） are *** and surface water temperatures（℃） varied from 25.1 to 30.1 and from 24.5 to 28.5 *** values varied from 6 to 28.5 and the pH ranged between 7.0 and *** in dissolved oxygen content was from 3.1 to 7.5 mg/dm^3 while the light extinction coefficient values（LEC） ranged between 3.1 and 10.1 *** ranges of inorganic nutrients（μmol/dm^3） viz.,nitrate,nitrite,phosphate and silicate were 10.1-23.4,1.2-8.9,0.2-3.1 and 55-125,*** ranges of Chlorophyll a（μg/dm-3） values was ***,124 phytoplankton species representing different classes viz：Bacillariophyceae（77）,Dinophyceae（19）,Cyanophyceae（15）,Chlorophyceae（10） and Chrysophyceae（3） were *** phytoplankton cell abundance varied from 0.290 to 111.662 cells/cm-3,with peak diversity（3.38 bits/ind.） during summer *** maximum abundance was found during summer season coinciding with the stable hydrographical *** seasonal distribution and abundance of phytoplankton are discussed in relation to hydrographical *** Correspondence Analysis（CCA） was applied in this paper for discriminating environmental factors having effect on phytoplankton community at species *** coastal water is subjected to long term fluctuations in physico-chemical parameters depending upon the seasonal tidal amplitude and freshwater influx resulting in a continuous exchange of organic,inorganic,plant and animal matters.

关键词： physico-chemical parameters phytoplankton species composition abundance diversity Coleroon coastal waters

CaCo1-xRuxOy: Role of Ru/Co Ratio on Its Transport Properties

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New Journal of Glass and Ceramics 2014年第1期4卷 8-17页

作者： Sezhian annamalai Rudra P. Bhatta Jugdersuren Battogtokh Ian L. Pegg Biprodas Dutta Vitreous State Laboratory the Catholic University of America Washington DC USA Vitreous State Laboratory the Catholic University of America Washington DC USA Currently at Corninng Incorporated Corning NY USA Vitreous State Laboratory the Catholic University of America Washington DC USA Currently at Naval Research Lab Washington DC USA

Calcium cobaltites, especially Ca3Co4O9 with a misfit layered structure, are promising thermoelectric materials due to their suitability for high temperature applications and low densities. The existence of low spin-state electronic configurations for both and species is one of the key parameter to explain the large thermopower values. Ruthenium oxide, with a layered structure, exhibits strong electron-electron correlation and the extended nature of their 4d electrons enhances orbital overlapping which is expected to influence the transport characteristics of CaCo1-xRuxOy (CCR) samples, by affecting the spin state of the 3d Co ions. The effect on thermopower and electrical resistivity due to partial substitution of Co by Ru ions, up to 0.33 moles, from 300 to 600 k was investigated. A sharp decline in resistivity and in thermopower was observed until a transition ion ratio (TIR), (Ru/(Ru + Co)), of 0.5 is reached, beyond which both the properties became less sensitive to TIR. These variations in the transport properties are explained by the presence of 4d Ru in close proximity to the Co, which could influence the spin and oxidation state of Co ions. The Co rich and Ru rich samples exhibit very distinct microstructures and phase assemblages.

关键词： Calcium Cobaltite Ruthenium Oxide Calcium Ruthenate Transport Properties Thermoelectric Properties Seebeck Coefficient Resistivity

Effect of Welding Processes on Tensile and Impact Properties,Hardness and Microstructure of AISI 409M Ferritic Stainless Joints Fabricated by Duplex Stainless Steel Filler Metal

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Journal of Iron and Steel Research International 2009年第5期16卷 66-72页

作者： A k Lakshminarayanan k Shanmugam V Balasubramanian Centre for Materials Joining and Research(CEMAJOR) Department of Manufacturing EngineeringAnnamalai University

The effect of welding processes such as shielded metal arc welding, gas metal arc welding and gas tungsten arc welding on tensile and impact properties of the ferritic stainless steel conforming to AISI 409M grade is studied. Rolled plates of 4 mm thickness were used as the base material for preparing single pass butt welded joints. Tensile and impact properties, microhardness, microstructure and fracture surface morphology of the welded joints have been evaluated and the results are compared. From this investigatio.n, it is found that gas tungsten arc welded joints of ferritic stainless steel have superior tensile and impact properties compared with shielded metal arc and gas metal arc welded joints and this is mainly due to the presence of finer grains in fusion zone and heat affected zone.

关键词： ferritic stainless steel shielded metal arc welding gas metal arc welding gas tungsten arc welding tensile impact property