Results in Materials最新文献

{"title":"Direct laser powder bed fusion of ceramics","authors":"Thywill Cephas Dzogbewu ,&nbsp;Deon Johan de Beer","doi":"10.1016/j.rinma.2025.100664","DOIUrl":"10.1016/j.rinma.2025.100664","url":null,"abstract":"<div><div>Direct laser powder bed fusion (LPBF) of ceramics has experienced tremendous advancement and it is about to be metamorphosed from the laboratory research phase to the industrial scale. Nonetheless, several challenges need to be overcome before progressing to the next phase of manufacturing crack-free, large-size, and multimaterial ceramic products via the direct LPBF process with high surface quality and homogeneous mechanical integrity. Surprising the current challenges required automation of the in-process activities to control the high viscous ceramic molten pool and its solidification mechanisms to mitigate the building up of thermal stress, and crack formation to ensure the production of crack-free, large-size ceramic parts with high surface quality. The automation of the process would ensure consistency, reliability, and reproducibility of direct printing of ceramic products, which would speed up the development of a validation framework for the certification of direct printed ceramic products. The post-processing activities of the indirect ceramic printing process might not be the ideal approach for producing dense crack-free ceramic products, since it could increase the cost of the product by 70 % without any significant improvement as compared to the direct LPBF ceramic manufacturing route.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"25 ","pages":"Article 100664"},"PeriodicalIF":0.0,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comprehensive device modeling of organic-inorganic hybrid CH3NH3GeI3 based perovskite solar cell","authors":"Riduan Ferdous,&nbsp;Galib Hashmi","doi":"10.1016/j.rinma.2025.100665","DOIUrl":"10.1016/j.rinma.2025.100665","url":null,"abstract":"<div><div>Organic-inorganic lead-based perovskite solar cells (PSCs) have emerged as a promising and rapidly evolving photovoltaic technology in recent years. However, the use of high-toxic lead material in PSC is incompatible with the 12^th sustainable development goal and restricts the potential for commercialization. Recently, lead-free methylammonium germanium tri-iodide (CH₃NH₃GeI₃)-based hybrid perovskite solar cells have garnered substantial attention in the field of photovoltaics due to their remarkable combination of high efficiency. The exceptional photovoltaic performance of hybrid CH₃NH₃GeI₃ perovskite solar cells is the central theme of this study. Where emphasis has been given to attaining high power conversion efficiency by adjusting various parameters of the CH₃NH₃GeI₃ perovskite layer using a solar cell capacitance simulator (SCAPS-1D). Moreover, the influence on parameter changes, i.e., thickness, doping concentration, quantum efficiency, and defect density of perovskite, ETL, HTL, HTL/CH₃NH₃GeI₃, and CH₃NH₃GeI₃/ETL layers, has been explored. The unique FTO/ZnO/CH₃NH₃GeI₃/Cu₂O/Ni-structured perovskite solar cell demonstrates impressive simulative performance with a V_OC of 1.39 V, J_SC of 21.93 mA/cm², a fill factor of 79.82 %, and an efficiency of 24.46 %. CH₃NH₃GeI₃ is a promising candidate that can be employed as a perovskite layer, and if fabricated properly, FTO/ZnO/CH₃NH₃GeI₃/Cu₂O/Ni perovskite solar cell has the possibility to be a competitive alternative to conventional silicon-based photovoltaics.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"25 ","pages":"Article 100665"},"PeriodicalIF":0.0,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microstructure and hardness properties for laser powder directed energy deposition cladding of Inconel 718 on electron beam powder-bed fusion fabricated Inconel 625 substrates: As-built and post-process heat treated","authors":"D. Garcia ,&nbsp;K.I. Watanabe ,&nbsp;L. Marquez ,&nbsp;E. Arrieta ,&nbsp;L.E. Murr ,&nbsp;R.B. Wicker ,&nbsp;F. Medina","doi":"10.1016/j.rinma.2025.100660","DOIUrl":"10.1016/j.rinma.2025.100660","url":null,"abstract":"<div><div>Laser powder directed energy deposition (LP-DED) additive manufacturing (AM) deposited Inconel 718 claddings (at laser power levels of 800, 1000, and 1200 W) onto Inconel 625 substrates fabricated by electron beam powder-bed fusion (EB-PBF). The cladding components were post-process heat treated for 1 h at temperatures of 1025 °C, 1175 °C, and 1250 °C. The microstructures and Vickers hardnesses were examined and compared for the as-built and heat treated cladding components. As-built claddings consisted of columnar dendrites and precipitate columns while the heat-treated microstructures consisted of varying degrees of recrystallization and grains containing {111} fcc annealing twins. The as-built cladding bond consisted of a 25–50 μm wide transition zone while the heat treated cladding bonds consisted primarily of linked grain boundaries sometimes alternating between the Inconel 718 alloy cladding and the Inconel 625 substrate. For the as-built components, the hardness increased from the Inconel 625 substrate to the Inconel 718 cladding. For the heat treated components, the hardness for the Inconel 718 cladding was lessened with increasing heat treatment temperature, but was overall similar to the Inconel 625 substrate.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"25 ","pages":"Article 100660"},"PeriodicalIF":0.0,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication and characterization of corn starch based bioplastic for packaging applications","authors":"Md. Arefin Kowser ,&nbsp;Hanif Mahmud ,&nbsp;Mohammad Asaduzzaman Chowdhury ,&nbsp;Nayem Hossain ,&nbsp;Juhi Jannat Mim ,&nbsp;Safiul Islam","doi":"10.1016/j.rinma.2025.100662","DOIUrl":"10.1016/j.rinma.2025.100662","url":null,"abstract":"<div><div>Plastic packaging plays a significant part in keeping food safe. However, there are essential concerns for human health and the environment due to its non-biodegradable nature, recycling difficulty, and hazardous chemicals leaking into food and soil.The development of novel packaging materials emphasizing the environment, food quality, and safety is also required by global packaging regulations and awareness of plastic packaging. Therefore, there is a pressing need to investigate bio-sourced polymer-based substitutes for non-biodegradable food packaging materials. Wherever petroleum-based plastics are used, bioplastics have a lot of potential and are widely accepted. It can satisfy the growing demand for biodegradable products. This research project aims to create two types of bioplastic films: corn starch-based and corn starch with silver-based.Corn starch is biodegradable; metallic Silver reinforces bioplastic and increases its antimicrobial properties. Both samples have been carefully characterized by the Soil Burial Test (SBT), Moisture Test, Fourier Transformed Infrared Spectroscopy (FTIR), antimicrobial analysis tests, Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) analysis. The surface morphology of the developed bioplastic has been shown in the SEM images. The water absorption capacity was also investigated, and it was found to be directly related to their characteristic of biodegradation. Similar findings have been made by earlier research, which showed that a high degradable starch concentration boosted water absorption. Enhanced microbial and enzyme activity through more excellent water absorption typically leads to faster biodegradation. The creation of starch bioplastics and composite bioplastics has already occurred, as shown by the functional groups O–H, C–H, C=O, and C–O, as validated by FTIR spectroscopy. The films were also subjected to improved antimicrobial tests against <em>S. aureus</em> and <em>E. coli,</em> whereby they depicted potential antimicrobial properties. Corn starch with silver-based samples increased antimicrobial properties and showed a 44 % bacterial reduction rate against <em>E. coli</em> and 50 % against <em>S. aureus</em>. The prepared bioplastic samples can be utilized as a developing substitute for traditional polymers in packaging made of bio-sourced materials due to their wide availability, biodegradability, easy processing, and good antimicrobial and barrier properties.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"25 ","pages":"Article 100662"},"PeriodicalIF":0.0,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hot deformation behaviour, constitutive equations and processing map of Cu-Zn-Al-Ni shape memory alloy","authors":"Kenneth Kanayo Alaneme ,&nbsp;Sodiq Abiodun Kareem ,&nbsp;Justus Uchenna Anaele ,&nbsp;Michael Oluwatosin Bodunrin","doi":"10.1016/j.rinma.2025.100663","DOIUrl":"10.1016/j.rinma.2025.100663","url":null,"abstract":"<div><div>The hot workability and deformation behaviour of Cu-Zn-Al-Ni based shape memory alloy (SMA) was investigated. The alloy was isothermal compression tested at temperatures of 250–550 <span><math><mrow><mo>°C</mo></mrow></math></span>, strain rates of 0.1–5 s⁻¹, and a constant total strain of 0.5, using a thermomechanical Gleeble-3500 simulator. The results show that positive strain rate sensitivity characterized the plastic flow behaviour of the SMA. The hyperbolic-sine constitutive equation - determined activation energy for the hot deformation of Cu-Zn-Al-Ni SMA (154.34 kJ/mol) is about 24 % lower than the activation energy for self-diffusion of copper, and that of the stress exponent value (n) which was less than 5, both point to dynamic recrystallization to be the dominant dynamic softening mechanism. Furthermore, the processing map indicated that flow instability occurs in the low temperature and strain rate regions (250 - 350 <span><math><mrow><mo>°C</mo></mrow></math></span>, 0.1 – 5s⁻¹) with characteristic shear bands, dendritic structures, and micro-cracks in their microstructure. The temperature of 550 <span><math><mrow><mo>°C</mo></mrow></math></span> and strain rates of between 0.1 and 2.5 s⁻¹, was established to be the optimal condition for hot deformation of the alloy. These conditions result in stable flow with microstructures consisting of fine dynamically recrystallized grains.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"25 ","pages":"Article 100663"},"PeriodicalIF":0.0,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of bitumen emulsion (POLYCOAT) on the mechanical properties of cement mortar","authors":"Wasan Mahdi Mahmood,&nbsp;Dhifaf Natiq Hamdullah,&nbsp;Sara Ali Almawla,&nbsp;Abdulkader Ismail Al-Hadithi","doi":"10.1016/j.rinma.2025.100658","DOIUrl":"10.1016/j.rinma.2025.100658","url":null,"abstract":"<div><div>This paper aims to study the effect of partial replacement of cement with bitumen emulsion (BE) commercially known as POLYCOAT on the mechanical properties and microstructure of cement mortar. For compressive strength, a decrease of 20 % was observed at 2.5 %, 5 % and 7.5 % replacement, while it decreased by 30 % at 10 %. This is due to the cement absorbing water from the bitumen, and forming a bituminous layer that reduces the compressive strength. As for tensile strength, it increased by 19 % at 7.5 % replacement by weight of cement, which reduces porosity and improves internal density, but when the percentage increases further, the tensile strength decreases. This was proven by studying the porosity using Image J software, which showed a slight increase in porosity with BE. Fourier transform infrared spectroscopy (FTIR) analyses showed that the addition of BE did not change the chemical composition of the hydration products. These results confirm that the main effect of adding bitumen is a physical effect that enhances the properties of the material by modifying the microstructure and increasing the density of the bonds without forming new compounds. The results of this study showed that it is possible to use cement-bitumen mortar as a cushion layer that reduces noise and vibration in concrete structures. This may open the way to study the properties of this material and the possibility of using it as inhibitors in the field of railways and bridges, which means the need for more studies and laboratory tests.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"25 ","pages":"Article 100658"},"PeriodicalIF":0.0,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Guidelines and solutions for using natural fiber in footbridge construction: Addressing challenges and ensuring long-term performance","authors":"Ali Shahmirzaloo,&nbsp;Marco Manconi,&nbsp;Rijk Blok,&nbsp;Patrick Teuffel,&nbsp;Faas Moonen","doi":"10.1016/j.rinma.2025.100656","DOIUrl":"10.1016/j.rinma.2025.100656","url":null,"abstract":"<div><div>The lack of guidelines and building codes for design and validation, uncertainty in static and dynamic performance after production, and unknown long-term performance, make the building application process of natural fiber-reinforced composites challenging. This paper addresses these challenges comprehensively by outlining essential procedures required for building application and offering effective solutions. For the design phase, a new approach is proposed based on material properties and the underlying elastic strain limit. The mechanical model is manufactured and tested to validate design assumptions. Consequently, the 15m span novel footbridge made of flax fibers and a partial bio-based resin was produced. Following the bridge's production, a load test was conducted to assess its static performance. Strain and deflection values obtained from FBG and LVDT sensors, respectively, were measured and compared with FEA. Modal analysis was performed to obtain natural frequencies. Bridge management was developed to guarantee safety during the long-term service of the footbridge by determining strain thresholds with a new approach based on first loading outputs and damage evaluation for this material. The paper offers guidelines for material selection, design, production quality, static and dynamic performance evaluation, and bridge management, providing a holistic framework for the successful application of NF in footbridge.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"25 ","pages":"Article 100656"},"PeriodicalIF":0.0,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fast carbidization of silicon in additive manufactured Si-C-SiC composite","authors":"Tsovinar Ghaltaghchyan ,&nbsp;Khachik Nazaretyan ,&nbsp;Viktorya Rstakyan ,&nbsp;Marina Aghayan","doi":"10.1016/j.rinma.2024.100653","DOIUrl":"10.1016/j.rinma.2024.100653","url":null,"abstract":"<div><div>Silicon carbide-based composites are advantageous material for electronic industry. Their application is limited by the difficulty to fabricate complex structural parts. This research used powder bed additive manufacturing technology, particularly selective laser melting, to manufacture silicon carbide-based composite. However, during the laser sintering silicon carbide decomposed to silicon and carbon. Further carbidization of free silicon faces the challenge of silicon carbide (SiC) formation, which can prevent further reaction between the reacting elements.</div><div>To enhance the carbidization process we heated the samples with ultra-high heating rates (2000 °C/min) employing High-Speed Temperature Scanning (HSTS) technique using direct electrical current to heat the sample. Formation of silicon carbide takes place, achieving higher density of the samples. We have compared the results with the samples heated at relatively lower heating rates (100 °C/min). The mechanism of interaction was explained.</div><div>The heating rate has critical effect on silicon carbide formation, impacting the atomic diffusion rate between silicon and carbon, final microstructure and density of the samples. The silicon carbidization process can be achieved by direct heating the samples at ultra-high heating rates.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"25 ","pages":"Article 100653"},"PeriodicalIF":0.0,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determining the best hatch distances for selective laser melted SiC/Ti6Al4V(ELI) composites of different volume fractions of SiC","authors":"Masenate Thamae ,&nbsp;Maina Maringa ,&nbsp;Willie Bouwer du Preez","doi":"10.1016/j.rinma.2024.100652","DOIUrl":"10.1016/j.rinma.2024.100652","url":null,"abstract":"<div><div>The goal of this research was to determine the best hatch distances for different SiC volume fractions of selective laser sintered SiC/Ti6Al4V(ELI) composites. The constituents of this composite have different thermal physical properties, which give rise to different melt characteristics of different SiC volume fractions. Non-overlapped tracks lead to debonding of the layers and the production of pores, which degrade the mechanical qualities of the final additively manufactured parts, whereas high overlap rates lead to inefficient use of material and long build times of parts. As a result, different hatch distances should be explored to determine the best overlap rate for each SiC volume fraction. To print single layers in the present work, different laser powers ranging from 100 <em>W</em> to 350 <em>W</em> and scanning speeds ranging from 0.3 m/s to 2.7 m/s were used. The single layers for each SiC volume fraction were built with different hatch distances of 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, and 110 μm. The parameters of laser power, scanning speed and therefore, linear energy density, as well as layer thickness, for each SiC volume fraction were kept constant. A cross-sectional analysis of the printed layers was performed with a scanning electron microscope to investigate the degree of overlapping of adjacent tracks, internal pores, and variation in the depth of penetration into the substrate in a single layer, while a top-surface analysis was performed to investigate surface roughness, surface interconnection of the adjacent tracks, and the formation of surface irregularities. The data collected and analysis carried out here yielded values of best hatch distances at SiC volume fractions ranging from 5 % to 25 %, while no best hatch distances were achieved at an SiC volume fraction of 30 %.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"25 ","pages":"Article 100652"},"PeriodicalIF":0.0,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An extensive review on bibliometric analysis of carbon nanostructure reinforced composites","authors":"M.A. Shadab Siddiqui,&nbsp;M.A. Mowazzem Hossain,&nbsp;Ramisa Ferdous,&nbsp;M.S. Rabbi,&nbsp;S.M. Samin Yeasar Abid","doi":"10.1016/j.rinma.2024.100655","DOIUrl":"10.1016/j.rinma.2024.100655","url":null,"abstract":"<div><div>The rapid evolution of the mechanical industry necessitates reliable and innovative materials. Metal matrix composites (MMCs) have emerged as a leading contender for performing vital roles in this field. Carbon nanostructures, such as graphene and carbon nanotubes (CNTs), are particularly well-suited as reinforcement materials in MMCs. It has been found by recent experimental studies that incorporating CNTs and graphene as reinforcements into metal matrix composites, such as aluminum, magnesium, titanium, nickel, and copper matrices, can significantly enhance the mechanical, thermal, and tribological properties of these materials. This is achieved through various mechanisms, including the restriction of grain growth, hindrance of dislocations, load transfer at interfaces, and mitigation of thermal expansion mismatch. The precise reinforcement and optimization of fabrication techniques have opened up new avenues for achieving uniform nanostructure dispersion and strong interfacial bonding, leading to substantial improvements in quantitative properties. Such advancements in material science hold great promise for the development of high-performance materials with enhanced properties that are vital for various applications, including aerospace, automotive, biomedical, and beyond. The addition of low-carbon nanostructures to polymer matrix, ceramic, and biocomposite systems has also been observed to elicit noteworthy multifunctional improvements. Reinforcing collagen with CNT fibers leads to better mechanical and electrical performance compared to using collagen alone. This critical review provides an insightful and data-driven analysis of the current state of carbon nanostructure (CNTs/graphene)-reinforced metal matrix and biocomposites based on an extensive literature evaluation. The review includes an in-depth examination of the optimized synthesis and processing techniques for CNTs and graphene MMCs, highlighting the impact of reinforcement on their mechanical, thermal conductivity, electrical conductivity, and functional properties. Continued work refining fabrication methods fully leverages their potent multi-functional enhancement capabilities.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"25 ","pages":"Article 100655"},"PeriodicalIF":0.0,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}