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| 1 | Synthesis and characterization of sol-gel derived ZrO2 doped Al2O3 nanopowder 显示文摘 | Debasish Sarkar Deepak Mohapatra Sambarta Ray | 2007 | Ceramics International2007，33，： | 1 |
| 2 | Synthesis and characterization of sol-gel derived ZrO2 doped Al2O3 nanopowder 显示文摘 | Debasish Sarkar Deepak Mohapatra Sambarta Ray Santanu Bhattacharyya Sukumar Adak Niren Mitra | 2007 | Ceramics International2007，33，： | 1 |
| 3 | Erosive Wear Study of PPLSF/Glass Fiber Reinforced Hybrid Laminates显示文摘This work is focused to examine the erosive performance of hybrid Palmyra palm leaf stalk fiber(PPLSF)/glass polyester laminate against solid particle bombardment.A hand lay-up method was adopted for the fabricating four piles of five distinct laminates with different stacking order glass and PPLSF layers.Amongst them,one group of pure PPLSF and pure E-glass laminates were fabricated.The hybrid laminates were exposed to high speed stream of solid sand particle at three distinct impact velocities(48,70 and 82 m/s)and four different angles of impingement(30°,45°,60°and 90°).The effect of particle velocity,angle of impingement and stacking order on both wear rate and efficiency were highlighted.The experimental assessment reveals a significant improvement in erosive wear resistance properties due to hybridization of PPLSF with E-glass.Again,the laminates with PPLSF layer as skin and glass as core layer exhibited better erosive wear resistance properties than other types of laminates.Further,a maximum value of erosion at lower velocity(48 m/s)is also noticed at 45°impingement angle.However,at high velocity of impact 70 m/s and 82 m/s,the maximum rate of erosion has been shifted from 45°impact angle to 60°impact angle.The alternation of this semi-ductile character to semi-brittle character is evidenced by analyzing the experimental data.Further to justify the mode of erosion,the eroded surface samples were inspected by scanning electron microscope(SEM). | Chetana Tripathy Deepak Kumar Mohapatra Chitta Ranjan Deo Punyapriya Mishra | 2024 | Journal of Harbin Institute of Technology(New Series)2024，31，2： | 0 |
| 4 | Evaluation of Dielectric Properties of CCTO-BT/Epoxy Composites for Electronic Applications显示文摘In the current study,the calcium copper titanate(CCTO)/epoxy,barium titanate(BT)/epoxy and CCTO-BT/epoxy composite samples with variable volume fractions of CCTO and BT are fabricated using hand lay-up and compression moulding process. The composite samples are characterized for the frequency dependence on dielectric properties,conductivity,impedance spectroscopy and electrical modulus.X-ray diffraction(XRD)representation of CCTO-BT/epoxy composite samples confirmed the presence of both CCTO and BT ceramic samples separately. The dielectric characteristics of hybrid CCTO-BT/epoxy composite samples with CCTO∶BT ratio of 40∶60, 60∶40,and 50∶50 was found relatively better than those of single ceramic filler reinforced epoxy composites. AC conductivity analysis shows improvement in the results of hybrid filler-filled CCTO-BT/epoxy composites in comparison with single filler-filled epoxy composite.50∶50 CCTO-BT/epoxy composite shows the best AC conductivity value of~ 2.2 ×10^(-5) ohm^(-1)·m^(-1) at a higher frequency of 1MHz. The impedance analysis confirms the higher insulating properties for hybrid 40∶60 and 60∶40 CCTO-BT/epoxy composites with respect to the single and other hybrid ceramic epoxy composites. The analysis suggests the hybrid CCTO-BT/epoxy composites to be adopted as a potential dielectric material for energy storage devices and other electronic applications. | Swagatika Mishra Punyapriya Mishra Punyatoya Mishra Dinesh Kumar Mishra Krushna Prasad Shadangi Deepak Kumar Mohapatra | 2024 | Journal of Harbin Institute of Technology(New Series)2024，31，1： | 0 |
| 5 | Erosion Wear Behaviour of Kenaf/Glass Hybrid Polymer Composites显示文摘The awareness amongst the researchers to develop an environment friendly sustainable material leads to explore new class of plant-based fiber for making composites. Hybridization of such plant-based fiber with inclusion of engineered fiber is one of the promising methods to not only enhanced the mechanical performance but also suppressed the drawbacks that associate with such plant-based fiber to some extent. A usual hand lay-up method was taken-up in this work to fabricate four layered of hybrid kenaf(K)/glass(G)polyester laminates with different stacking order such as KKKK,KGKG,KGGK,GKKG and GGGG. The erosive character of the laminates was examined under three distinct particle velocities(48m/s, 70m/s,82m/s)and four different impact angles(30°, 45°, 60°, 90°). All fabricated laminates exhibited a semiductile character at lower velocities(48m/s and70m/s)as peak wear rate was observed at45° impact angle. However,they showed a semi-brittle character at high velocity(82m/s)as maximum rate of erosion was noticed at60° impact angle. Again,the influence of stacking order of piles on erosion wear was also clearly noticed. Moreover,the semi-brittle/semi-ductile characterization was also evidenced in accordance to the range of erosion efficiencies. The micro-structures of worn surfaces were inspected thoroughly from the images of scanning electron microscope(SEM)to evident the mechanism of erosion. | Chandrakanta Mishra Deepak Kumar Mohapatra Chitta Ranjan Deo Punyapriya Mishra Kiran Kumar Ekka | 2024 | Journal of Harbin Institute of Technology(New Series)2024，31，1： | 0 |
| 6 | Towards the development of cavitation technology for upgrading bitumen: Viscosity change and chemical cavitation yield measurements显示文摘Among the different methods used for reducing viscosity of bitumen,acoustic cavitation during sonication is well recognised.Several chemical methods were used to detect the production of reactive species such as hydroxyl radicals and hydrogen peroxide during acoustic cavitation processes.However,quantification of cavitation yield in sonochemical systems is generally limited to low frequencies and has not been applied to bitumen processing.An empirical determination of the cavitation yield in midto high-frequency range(378,574,850,992,and1173 k Hz)was carried out by measuring the amount of iodine liberated from the oxidation of potassium iodide(KI).Further,cavitation yield and the effects of different sonic operating conditions such as power input(16.67%–83.33%)and solute concentration on cavitation yield were carried out in KI solution and sodium carboxymethyl cellulose–water mixture to obtain benchmark changes in rheology and chemistry using these two model fluids.The findings were then applied to bitumen upgrading through sonication.Through this study,it was found that the chemical cavitation yield peaked with a sonication frequency of 574 k Hz.It was also found that cavitation yield and viscosity change were correlated directly in bitumen and a 38%lower bitumen viscosity could be obtained by acoustic cavitation. | Deepak M. Kirpalani Dipti Prakash Mohapatra | 2017 | Petroleum Science2017，14，2： | 0 |
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