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Spark Plasma Sintering of Mg-based Alloys:Microstructure,Mechanical Properties,Corrosion Behavior,and Tribological Performance

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Journal of Magnesium and Alloys 2024年第2期12卷 405-442页

作者： Alessandro M.Ralls Mohammadreza Daroonparvar pradeep l.menezes Department of Mechanical Engineering University of Nevada RenoRenoNV89557United States

Within the past ten years,spark plasma sintering(SPS)has become an increasingly popular process for Mg *** the SPS process,interparticle diffusion of compressed particles is rapidly achieved due to the concept of Joule *** to traditional and additive manufacturing(AM)techniques,SPS gives unique control of the structural and microstructural features of Mg *** doing so,their mechanical,tribological,and corrosion properties can be *** great advancements in this field have been made,these pieces of knowledge are scattered and have not been contextualized into a single *** motivation of this work is to address this scientific gap and to provide a groundwork for understanding the basics of SPS manufacturing for *** do so,the existing body of SPS Mg literature was first surveyed,with a focus on their structural formation and degradation *** was found that successful Mg SPS fabrication highly depended on the processing temperature,particle size,and particle *** addition of metal and ceramic composites also affected their microstructural features due to the Zener pinning *** degradative environments,their performance depends on their structural features and whether they have secondary phased *** industrial applications,SPS'd Mg was found to have great potential in biomedical,hydrogen storage,battery,automotive,and recycling *** prospects to advance the field include using Mg as a doping agent for crystallite size refinement and using bulk metallic Mg-based glass powders for amorphous SPS *** these findings,the interactions of multi-composites on the processing-structure-property relationships of SPS Mg is not well *** total,this work will provide a useful direction in the SPS field and serve as a milestone for future Mg-based SPS manufacturing.

关键词： Spark plasma sintering Magnesium alloys Nanocrystalline Tribology Mechanical properties Corrosion

Tribological interactions of 3D printed polyurethane and polyamide with water-responsive skin model

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Friction 2022年第1期10卷 159-166页

作者： Ashish K.KASAR Ashton CHAN Victor SHAMANAEV pradeep l.menezes Department of Mechanical Engineering University of NevadaReno NV 89557USA Department of Mechanical Engineering New York UniversityNew York 11201USA Department of Mechanical Engineering University of NevadaLas Vegas NV 89154USA

3D printing in the textile and fashion industry is a new emerging *** of 3D printing for designing clothes and other wearable accessories require tribological and biological understanding of 3D printing plastics against the complex human skin to mitigate skin-friction related ailments such as calluses and *** study provides tribological insight in search of an optimal 3D printable material that has minimal friction against the *** low friction 3D printable materials,thermoplastic polyurethane(TPU)and polyamide(TPA)were chosen and tribological testing was carried out against a water responsive skin *** skin model was synthesized using a gelatine based model made with cotton and crosslinked with *** testing of TPU/TPA against the skin model in dry and wet conditions were *** higher coefficient of friction(COF)was observed in the wet condition compared to the dry *** overcome the higher friction,TPA/TPU-sodium polyacrylate composites were prepared by heat pressing that significantly reduced COF of TPU and TPA by~40%and 75%,respectively,in wet conditions.

关键词： plastics friction polyurethane

Direct ink writing to fabricate porous acetabular cups from titanium alloy

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Bio-Design and Manufacturing 2023年第2期6卷 121-135页

作者： Naima Valentin Weijian Hua Ashish K.Kasar lily Raymond pradeep l.menezes Yifei Jin Mechanical Engineering Department University of NevadaRenoRenoNV 89557USA

Acetabular cups,which are among themost important implants in total hip arthroplasty,are usually made from titanium alloys with high porosity and adequate mechanical *** current three-dimensional(3D)printing approaches to fabricate customized acetabular cups have some inherent disadvantages such as high cost and energy consumption,residual thermal stress,and relatively low ***,in this work,a direct ink writing method was developed to print a cup structure at room temperature,followed by multi-step heat treatment to form microscale porous structure within the acetabular *** method is facilitated by the development of a self-supporting titanium-6 aluminum-4 vanadium(Ti64)ink that is composed of Ti64 particles,bentonite yield-stress additive,ultraviolet curable polymer,and *** effects of Ti64 and bentonite concentrations on the rheological properties and printability of inks were systematically ***,the printing conditions,geometrical limitations,and maximum curing depth were ***,some complex 3D structures,including lattices with different gap distances,honeycomb with a well-defined shape,and an acetabular cup with uniformly distributed micropores,were successfully printed/fabricated to validate the effectiveness of the proposed method.

关键词： Acetabular cup Direct ink writing Titanium alloy Bentonite Heat treatment

Surface modification of magnesium alloys using thermal and solid-state cold spray processes:Challenges and latest progresses

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Journal of Magnesium and Alloys 2022年第8期10卷 2025-2061页

作者： Mohammadreza Daroonparvar Hamid Reza Bakhsheshi-Rad Abbas Saberi Mahmood Razzaghi Ashish K Kasar Seeram Ramakrishna pradeep l.menezes Manoranjan Misra Ahmad Fauzi Ismail Safian Sharif Filippo Berto Department of Mechanical Engineering University of NevadaRenoNV89501USA Advanced Materials Research Center Department of Materials EngineeringNajafabad BranchIslamic Azad UniversityNajafabadIran Department of Mechanical Engineering National University of Singapore9 Engineering Drive 1Singapore 117576Singapore Department of Chemical and Materials Engineering University of NevadaRenoNV89501USA Advanced Membrane Technology Research Center(AMTEC) Universiti Teknologi MalaysiaJohor Bahru 81310JohorMalaysia Faculty of Engineering Universiti Teknologi MalaysiaJohor Bahru 81310JohorMalaysia Department of Mechanical and Industrial Engineering Norwegian University of Science and Technology7491 TrondheimNorway

Potential engineering applications of magnesium(Mg)and Mg-based alloys,as the lightest structural metal,have made them a popular subject of ***,the inferior corrosion and wear characteristics significantly limit their application *** is widely recognized that surface treatment is the most commonly utilized technique for remarkably improving a substrate’s surface *** methods have been introduced for the surface treatment of Mg and Mg-based alloys to improve their corrosion behavior and tribological *** these,thermal spray(TS)technology provides several methods for deposition of various functional metallic,ceramic,cermet,or other coatings tailored to particular *** researches have shown the tremendous potential for thermal spray coated Mg alloys for biomedical and industrial *** this context,the cold spray(CS)method,as a comparatively new TS coating technique,can generate the coating layer using kinetic energy rather than combined thermal and kinetic energies,like the high-velocity oxy-fuel(HVOF)spray ***,the CS process,as a revolutionary method,is able to repair and refurbish with a faster turnaround time;it also provides solutions that do not require dealing with the thermal stresses that are part of the other repair processes,such as welding or other TS processes using a high-temperature *** this review paper,the recently designed coatings that are specifically applied to Mg alloys(primarily for industrial applications)employing various coating processes are *** of the increased utilization of CS technology for both 3D printed(additively manufactured)coatings and repair of structurally critical components,the most recent CS methods for the surface treatment,repair,and refurbishment of Mg alloys as well as their benefits and restrictions are then discussed and reviewed in ***,the prospects of this field of study are briefly discussed,along with a summa

关键词： Mg-based alloys Surface modification Thermal and cold spray processes Corrosion behavior Wear resistance

Aerodynamics of a Tandem-Bladed Axial Compressor Rotor under Circumferential Distortion at Different Rotational Speeds

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Journal of Thermal Science 2024年第4期33卷 1340-1356页

作者： Amit KUMAR Jerry T.JOHN A.M.pradeep R.A.DAKKERMANS Dragan KOZUlOVIC Department of Aerospace Engineering Indian Institute of Technology BombayMumbai400076India Department of Automotive and Aeronautical Engineering Hamburg University of Applied Sciences20099HamburgGermany Institute of Jet Propulsion Bundeswehr University Munich85577NeubibergGermany

For most aircraft engines,inflow distortion is *** distortion is known to degrade the aerodynamic performance and stable operating limits of a *** rotor configuration is an arrangement that effectively controls the growth of the boundary layer over the suction surface of the ***,a higher total pressure rise can be achieved through this unconventional design approach involving the splitting of the blade into forward and aft *** is expected that the effect of inlet flow distortion would be more severe for a tandem-rotor design due to the greater flow turning inherent in such ***,this aspect needs to be thoroughly *** present study discusses the effect of circumferential distortion on the tandem-rotor at different rotational ***-annulus RANS simulations using ANSYS CFX are used in the present *** performance of the rotor at a particular flow coefficient and different rotational speeds is *** total pressure and efficiency are observed to drop at lower mass flow rates under the influence of circumferential *** loss region in each blade passage is mainly associated with the blade wake,tip leakage vortex,secondary flow,and boundary ***,their contribution varies from passage to passage,particularly in the distorted *** the lower span,the wake width is found to be higher than that at a higher *** to the redistribution of the mass flow,the circumferential extent reduces at a higher *** the undistorted sector,the strength of the tip leakage vortex is significantly higher at the design rotational speed than at lower *** distortion near the tip region promotes an early vortex breakdown even at the design operating *** adversely affects the total pressure,efficiency,and stall *** clean flow conditions,this phenomenon is only observed near the stall *** the design operating condition,the breakdown of the forward rotor tip l

关键词： tandem rotor circumferential distortion loss tip leakage vortex vortex breakdown diffusion factor aerodynamics of compressor blade

Impact of Flow Rate in Integration with Solar Radiation on Color and COD Removal in Dye Contaminated Textile Industry Wastewater:Optimization Study

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Energy Engineering 2022年第1期119卷 419-427页

作者： pradeep K.Majhi Rifat Azam Richa Kothari Naveen Kumar Arora V.V.Tyagi Department of Environmental Sciences Babasaheb Bhimrao Ambedkar UniversityLucknow226025U.P.India Department of Environmental Sciences Central University of JammuRahya-SuchaniBaglaSamba181143J&KIndia School of Energy Management Shri Mata Vaishno Devi UniversityKatra182320J&KIndia

Dyes are an integral part of the dying industry and have significantly resulted in environmental pollution by altering the standardwater quality after their discharge into the water *** culprits behind the altered water quality are the pretreatment chemicals used during dying manufacturing *** advanced treatmentmethods using conventional and advanced treatment options including solar energy have been put forth by researchers for the treatment of the dying effluents but,these methods have not proved significantly ***,the present study intends to check the efficiency of solar parabolic trough collector for treating the dying effluents in terms of color and ***,other wastewater parameters(BOD,nitrate and phosphate)have also been considered for this experimental *** standard flow rates(0.5,1.3,1.95 and 2.6 l/M)were maintained during the experiment for six hours at solar intensity(849.3±21.2W/m^(2))and the optimized flow rate(1.95 l/M)was detected and considered for further study during the present *** color concentration showed a significant reduction(≥76.4%)by treatment with the designed solar *** significant results were also noticed in terms of COD(79%).In this context,the current experimental study provides ideas on the decolorization and COD reduction efficiency with optimal flow rate in terms of cost-effectiveness with designed experimental reactor which could be further used and implemented for advanced scientific purposes.

关键词： Dye industry effluents decolorization renewable energy-based treatment lab-scale experiment

Frequency Domain Adaptive learning Algorithm for Thoracic Electrical Bioimpedance Enhancement

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Computers, Materials & Continua 2022年第9期72卷 5713-5726页

作者： Md Zia Ur Rahman S.Rooban P.Rohini M.V.S.Ramprasad pradeep Vinaik Kodavanti Department of Electronics and Communication Engineering Koneru Lakshmaiah Education FoundationK L UniversityVaddeswaramGuntur522502Andhra PradeshIndia Department of Computer Science and Engineering Faculty of Science and TechnologyICFAI Foundation for Higher EducationHyderabad500082TelanganaIndia Department of Electrical Electronics and Communication EngineeringGITAM Institute of TechnologyGITAM Deemed to be UniversityVisakhapatnam530045Andhra PradeshIndia

The Thoracic Electrical Bioimpedance(TEB)helps to determine the stroke volume during cardiac *** measuring cardiac signal it is contaminated with *** commonly encountered artifacts are Baseline wander(BW)and Muscle artifact(MA),these are physiological and *** the nature of these artifacts is random,adaptive filtering is needed than conventional fixed coefficient filtering *** address this,a new block based adaptive learning scheme is proposed to remove artifacts from TEB signals in clinical *** proposed block least mean square(BlMS)algorithm is mathematically normalized with reference to data and *** normalization leads,block normalized lMS(BNlMS)and block error normalized lMS(BENlMS)*** adaptive artifact cancellers are developed in both time and frequency domains and applied on real TEB quantities contaminated with physiological *** ability of these techniques is measured by calculating signal to noise ratio improvement(SNRI),Excess Mean Square Error(EMSE),and Misadjustment(Mad).Among the considered algorithms,the frequency domain version of BENlMS algorithm removes the physiological artifacts effectively then the other counter ***,this adaptive artifact canceller is suitable for real time applications like wearable,remove health care monitoring units.

关键词： Adaptive learning artifact canceller block processing frequency domain thoracic electrical bioimpedance

Rice(Oryza sativa l.)plant protection using dual biological control and plant growth-promoting agents:Current scenarios and future prospects

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Pedosphere 2023年第2期33卷 268-286页

作者： Debasis MITRA Sergio DE lOS SANTOS-VIllAlOBOS Fannie Isela PARRA-COTA Ana María Garcia MONTElONGO Erika lorena BlANCO Vanessa l.lIRA Adeyemi N.OlATUNBOSUN Bahman KHOSHRU Rittick MONDAl Parameswaran CHIDAMBARANATHAN Periyasamy PANNEERSElVAM pradeep K.DAS MOHAPATRA Department of Microbiology Raiganj UniversityRaiganjUttar DinajpurWest Bengal 733134(India) Instituto Tecnológico de Sonora 5 de febrero 818.Col.CentroCd.ObregónSonora 85000(Mexico) Campo Experimental Norman E.Borlaug-Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias(INIFAP)Norman E.Borlaug Km.12C.P.Ciudad ObregónSonora 85000(Mexico) laboratorio de Investigación en Biotecnología y Química de Polímeros Decanato de InvestigaciónUniversidad Nacional Experimental del TáchiraSan Cristóbal 5001(Venezuela) Departamento de Micologia Federal University of PernambucoRecifePE 50670-901(Brazil) Department of Plant Physiology and Crop Production Federal University of AgricultureAbeokuta 111101(Nigeria) Department of Soil Science Faculty of AgricultureUniversity of TabrizTabriz 51664(Iran) Department of Sericulture Raiganj UniversityRaiganjUttar DinajpurWest Bengal 733134(India) Biotechnology Crop Improvement DivisionIndian Council of Agricultural Research(ICAR)-National Rice Research InstituteCuttackOdisha 753006(India) Microbiology Crop Production DivisionICAR-National Rice Research InstituteCuttackOdisha 753006(India) Professor A.K.Bothra Environment Conservation Centre Raiganj UniversityRaiganjUttar DinajpurWest Bengal 733134(India)

Various microorganisms live in association with different parts of plants and can be harmful,neutral,or beneficial to plant *** microbial inhabitants of plants can control plant diseases by contesting with,predating on,or antagonizing plant pathogens and by inducing systems for plant defense.A range of methods,including plant growth-promoting microorganisms(PGPMs)as biological control agents(BCAs)(BCA-PGPMs)are used for the biological management and control of plant *** BCAs interact with plants by inducing resistance or priming plants without direct interaction with the *** BCAs operate via nutrient competition or other mechanisms to modulate the growth conditions for the ***,PGPMs can be applied alone or together with other chemicals or carriers to control various crop *** review highlights the effective types of BCA-PGPMs and their applications,roles,carrier based-formulations,and responses to rice(Oryza sativa l.)*** plant disease management prospects are promising,and growers’increasing demand for BCA-PGPM products can be exploited as an effective approach to the management of plant diseases,as well as to improve yield,environmental protection,biological resources,and agricultural system sustainability.

关键词： biological control agent plant disease plant growth-promoting microorganism plant health plant pathogen

Protecting against different subtypes of influenza viruses:a nanoparticle approach

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Signal Transduction and Targeted Therapy 2020年第1期5卷 1982-1983页

作者： Changhua Yi Yongxiang Yi Junwei li pradeep Kumar Sacitharan Department of Infectious Diseases The Second Hospital of NanjingThe Affiliated Hospital of Nanjing University of Chinese Medicine#1 Zhongfu RoadNanjingJiangsu ProvinceChina Public Health and Therapy Center of Nanjing 211113 NanjingChina Department of General Surgery The Second Hospital of NanjingThe Affiliated Hospital of Nanjing University of Chinese Medicine#1 Zhongfu RoadNanjingJiangsu ProvinceChina College of Veterinary Medicine Qingdao Agricultural University266109 QingdaoChina The Institute of Ageing and Chronic Disease University of LiverpoolLiverpool L78TXUK Department of Biological Sciences Xi’an Jiaotong-Liverpool University#111 Ren’ai RoadSuzhou Industrial Park215123 SuzhouJiangsu ProvinceChina

A recent article by Wang et *** synthesized new nanoparticles consisting of cyclic guanosine monophosphate–adenosine monophosphate(cGAMP),which were administered alongside vaccines,to successfully deliver into the lungs of animals leading to protection against different subtypes of influenza infection without inflammatory side effects.

关键词： nanoparticle approach guanosine