6篇
您的检索式：作者名="Soumitra Kar"
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| 1 | Effect of arc-current and spray distance on elastic modulus and fracture toughness of plasma-sprayed chromium oxide coatings显示文摘In this experimental study, chromium oxide powder was sprayed on a low-carbon steel substrate using the atmospheric plasma spray process. The current and standoff distances(SODs) were varied to study their effect on the fracture toughness of the coatings. Theoretically, as the arc current increases, the melting of the ceramic oxide should increase and this in turn should lead to the formation of a dense coating. However,it was observed that if the arc power is too high and because the particle size of the powder is small(approximately 30 μm), the particles tend to fly away from the plasma core. Similarly, an appropriate SOD should provide the particles with more melting time, thus resulting in a dense coating. On the other hand, a larger SOD leads to the solidification of the molten particles before the droplets can reach the substrate. All these effects may lead to substantial variation in the fracture toughness of the coating. The present paper attempts to correlate the plasma spraying parameters and microstructure of the coating with the fracture toughness and other primary coating properties. | Simanchal KAR Partha Pratim BANDYOPADHYAY Soumitra PAUL | 2018 | Friction2018，6，4： | 3 |
| 2 | Catalytic Growth and Photoluminescence Properties of ZnS Nanowires显示文摘 | Kar Soumitra Biswas Subhajit Chandhuri Subhadra | 2005 | Nanotechnology2005，16，6： | 1 |
| 3 | Surfactant-assisted route to Synthesize Well-alligned ZnO Nanorod Arrays on Sol-gel-derived ZnO Thin Films显示文摘 | Apurba Dev Subhendu K Panda Soumitra Kar | 2006 | J Phys Chem B2006，110，14： | 1 |
| 4 | Synthesis and optical properties of nanometer to micrometer wide hexagonal cones and columns of ZnO 显示文摘 | Tandra Ghoshal Soumitra Kar Subhadra Chaudhuri | 2006 | Cryst Growth2006，293，： | 1 |
| 5 | Shape Selective Growth of CdS One-Dimensional Nanostructures by a Thermal Evaporation Process显示文摘 | Soumitra Kar Subhadra Chaudhuri | 2006 | J Phys Chem B2006，110，： | 1 |
| 6 | Probing and understanding interaction of Eu(Ⅲ)withγ-alumina in presenceof malonic acid显示文摘Radionuclide migration in aquatic environment is influenced by its sorption onto colloids/mineral oxides and the presence of organic complexing anions.With a view to understand the sorption of trivalent actinides by mineral oxides in presence of organic acid,in the present study,Eu(Ⅲ),malonic acid(MA)andγ-alumina are considered as representatives of trivalent actinides,low molecular weight natural occurring organic acid and aluminol sites,respectively.The influence of MA on sorption of Eu(Ⅲ)byγ-alumina was elucidated by batch sorption,spectroscopic techniques and surface complexation modeling,for the first time.Attenuated Total Reflection-Fourier Transform Infrared spectroscopic studies of MA sorbed onγ-alumina revealed the presence of two inner-sphere surface complexes.Batch sorption for binary(alumina-Eu(Ⅲ))and ternary(alumina-Eu(Ⅲ)-MA)systems were investigated as a function of p H,Eu(Ⅲ)concentration and sequential addition of Eu(Ⅲ)/MA.The p H edge for Eu(Ⅲ)sorption shifts to higher p H with increasing Eu(Ⅲ)concentration.In ternary systems,Eu(Ⅲ)sorption is significantly enhanced at p H<4.5.Eu(Ⅲ)speciation onγ-alumina is independent of addition sequence of Eu(Ⅲ)/MA.Time resolved fluorescence spectroscopy of Eu(Ⅲ)sorbed onγ-alumina exhibited two surface species,≡XOEu^2+and(≡YO)2 Eu^(+).The enhancement in I 616/I 592 and lifetime for ternary systems,as compared to binary system,at low p H,indicates the participation of Eu-MA complexes in the formation of surface species in ternary systems.The diffuse layer model has been employed to successfully model the experimental sorption profiles of binary and ternary systems,using code FITEQL 4.0,by considering the surface species identified by spectroscopic techniques. | Madhuri A Patel Aishwarya Soumitra Kar Vaibhavi V Raut B.S.Tomar | 2021 | Journal of Environmental Sciences2021，33，2： | 0 |
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