{"title":"Sorption concentration of ruthenium from sulfuric solutions","authors":"I. Zotova, S. Fokina, A. Boduen, G. Petrov","doi":"10.17580/NFM.2019.01.02","DOIUrl":"https://doi.org/10.17580/NFM.2019.01.02","url":null,"abstract":"","PeriodicalId":19653,"journal":{"name":"Nonferrous Metals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2019-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43914457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. Golubev, D. Chistiakov, V. Brichkin, T. Litvinova
{"title":"Systems and aids of mathematical modeling of the alumina refinery methods: problems and solutions","authors":"V. Golubev, D. Chistiakov, V. Brichkin, T. Litvinova","doi":"10.17580/NFM.2019.01.07","DOIUrl":"https://doi.org/10.17580/NFM.2019.01.07","url":null,"abstract":"","PeriodicalId":19653,"journal":{"name":"Nonferrous Metals","volume":"18 8","pages":""},"PeriodicalIF":1.5,"publicationDate":"2019-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41307298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. A. Naumova, M. Petrzhik, P. Shurkin, A. A. Sokorev
{"title":"Effect of Ca and Zn alloying on the structure and properties of Al – 2.5%Mg alloy","authors":"E. A. Naumova, M. Petrzhik, P. Shurkin, A. A. Sokorev","doi":"10.17580/NFM.2019.01.04","DOIUrl":"https://doi.org/10.17580/NFM.2019.01.04","url":null,"abstract":"","PeriodicalId":19653,"journal":{"name":"Nonferrous Metals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2019-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47802923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. V. Pancnehko, V. Bobkov, A. Fedulov, M. Chernovalova
{"title":"Mathematical modelling of thermal and physical-chemical processes during sintering","authors":"S. V. Pancnehko, V. Bobkov, A. Fedulov, M. Chernovalova","doi":"10.17580/NFM.2018.02.09","DOIUrl":"https://doi.org/10.17580/NFM.2018.02.09","url":null,"abstract":"","PeriodicalId":19653,"journal":{"name":"Nonferrous Metals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2018-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42323147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study investigated the eutectic alloys based on aluminum containing small amount of rare earth metals (REM): 2La; 6Ca 3Ni – 2Pr. The compositions of the alloys were selected on the basis of previous studies of ternary Al – Ca – Ni and Al – Ni – Ce systems, taking into account the similarity of the structure of the Al – REM binary systems. Melting was carried out in an induc- tion furnace by RELTEC. Alloys were prepared on the basis of aluminum A99. Annealing of the samples at 550 о C for three hours was carried out in SNOL 8.2/1100 and SNOL 58/350 muffle electric furnaces. Calculation of Al – Ca – Ni – Ce systems at 6% Ca by means of Thermo-Calc (databases TTAL5, TCAL4), showed that primary crystals of the Al 3 Ni phase should be formed in the alloys of the selected composi- tions, however these crystals were not present. Using optical and scanning electron microscopy, the structure of alloys in the as-cast and heat-treated states was studied. It is established that in the process of non-equilibrium crystallization, the boundary of the phase region of existence of the aluminum solid solution significantly expands. Using micro- X -ray spectral analysis (MRSA), it was determined that during the equilibrium crystallization conditions in the Al – Ca – Ni – Ce system, rather than the binary Al 3 Ni the ternary Al 9 Ni 2 Ca phase is formed. The possibility of applying hot rolling to Al – Ca – Ni based alloys addi- tionally alloyed with Ce, La and Pr has been established, and the mechanical properties of hot-rolled samples have been obtained. Hot rolling was carried out at 500 o C. Rolling was carried out in five passes, the total degree of deformation in all cases was about 70%. Samples of the Al – 6Ca – 3Ni – 2Ce alloy were additionally rolled at a temperature of 550 о C. On the basis of a comparison of the mechanical properties and the microstructure of rolled products, it is assumed that the best mechanical properties are possessed by the samples of those alloys in which intermetallics have the smallest dimensions and are most evenly distributed in an aluminum solid solution. In particular, this demonstrates the Al – 6Ca – 3Ni – 2La alloy rolled at 500 o C and the Al – 6Ca – 3Ni – 2Ce alloy rolled at 550 o C. Zr) and estimating their mechanical properties. It is shown that metal powders are notable for good compactability on both single-action compacting and isostatic forming. Cold iso- static forming under pressure of 200 MPa permits to obtain briquettes with relative density of 65–68%. Sintering the briquettes at a temperature of 1873 K provides blank formation with porosity of 16 and 8% for Ti – 30.1Nb – 17.4Ta, Ti – 33.2Nb – 8.6Zr (wt.%) alloys, respectively. Sintering in vacuum of 1.33 Pa leads to formation of a gas-filled layer with heightened microhardness to a depth of 8 mm. Sintering in vacuum of 1.33·10 –2 Pa allows to avoid this phenomenon. Hot isostatic pressing of the sintered blanks at a temperature of 1193 K and pressure of 150 M
{"title":"Investigation of the structure and properties of eutectic alloys of the Al – Ca – Ni system containing REM","authors":"E. A. Naumova, T. Akopyan, N. Letyagin, M. Vasina","doi":"10.17580/NFM.2018.02.05","DOIUrl":"https://doi.org/10.17580/NFM.2018.02.05","url":null,"abstract":"This study investigated the eutectic alloys based on aluminum containing small amount of rare earth metals (REM): 2La; 6Ca 3Ni – 2Pr. The compositions of the alloys were selected on the basis of previous studies of ternary Al – Ca – Ni and Al – Ni – Ce systems, taking into account the similarity of the structure of the Al – REM binary systems. Melting was carried out in an induc- tion furnace by RELTEC. Alloys were prepared on the basis of aluminum A99. Annealing of the samples at 550 о C for three hours was carried out in SNOL 8.2/1100 and SNOL 58/350 muffle electric furnaces. Calculation of Al – Ca – Ni – Ce systems at 6% Ca by means of Thermo-Calc (databases TTAL5, TCAL4), showed that primary crystals of the Al 3 Ni phase should be formed in the alloys of the selected composi- tions, however these crystals were not present. Using optical and scanning electron microscopy, the structure of alloys in the as-cast and heat-treated states was studied. It is established that in the process of non-equilibrium crystallization, the boundary of the phase region of existence of the aluminum solid solution significantly expands. Using micro- X -ray spectral analysis (MRSA), it was determined that during the equilibrium crystallization conditions in the Al – Ca – Ni – Ce system, rather than the binary Al 3 Ni the ternary Al 9 Ni 2 Ca phase is formed. The possibility of applying hot rolling to Al – Ca – Ni based alloys addi- tionally alloyed with Ce, La and Pr has been established, and the mechanical properties of hot-rolled samples have been obtained. Hot rolling was carried out at 500 o C. Rolling was carried out in five passes, the total degree of deformation in all cases was about 70%. Samples of the Al – 6Ca – 3Ni – 2Ce alloy were additionally rolled at a temperature of 550 о C. On the basis of a comparison of the mechanical properties and the microstructure of rolled products, it is assumed that the best mechanical properties are possessed by the samples of those alloys in which intermetallics have the smallest dimensions and are most evenly distributed in an aluminum solid solution. In particular, this demonstrates the Al – 6Ca – 3Ni – 2La alloy rolled at 500 o C and the Al – 6Ca – 3Ni – 2Ce alloy rolled at 550 o C. Zr) and estimating their mechanical properties. It is shown that metal powders are notable for good compactability on both single-action compacting and isostatic forming. Cold iso- static forming under pressure of 200 MPa permits to obtain briquettes with relative density of 65–68%. Sintering the briquettes at a temperature of 1873 K provides blank formation with porosity of 16 and 8% for Ti – 30.1Nb – 17.4Ta, Ti – 33.2Nb – 8.6Zr (wt.%) alloys, respectively. Sintering in vacuum of 1.33 Pa leads to formation of a gas-filled layer with heightened microhardness to a depth of 8 mm. Sintering in vacuum of 1.33·10 –2 Pa allows to avoid this phenomenon. Hot isostatic pressing of the sintered blanks at a temperature of 1193 K and pressure of 150 M","PeriodicalId":19653,"journal":{"name":"Nonferrous Metals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2018-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47604513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. Tarasov, E. Gorelikov, A. Kutepov, O. Khokhlova
{"title":"Investigation of the inherent magnetic field influence on corrosion resistance of Nd – Fe – B permanent magnets","authors":"V. Tarasov, E. Gorelikov, A. Kutepov, O. Khokhlova","doi":"10.17580/nfm.2018.02.04","DOIUrl":"https://doi.org/10.17580/nfm.2018.02.04","url":null,"abstract":"","PeriodicalId":19653,"journal":{"name":"Nonferrous Metals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2018-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46303968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The development of fundamental knowledge that allows making proper correlation among the chemical composition, structure and properties of non-ferrous alloys is a priority task for the metallurgy of nonferrous metals and alloys, as this knowledge makes the main contribution to the development of this subject and is a powerful tool for expanding the areas of their application. A variant of the establishment of regularities in metal science is the study of phase equilibria, transformations in the temperature range and compositions of metallic systems. In the scientific literature there is a lot of information on the results of studies of twoand three-component alloys in order to construct equilibrium phase diagrams. However, the non-equilibrium crystallization of alloys, and thus, the non-equilibrium phase diagrams are of greater practical interest from the point of view of industrial production. Taking into account that the compositions of industrial alloys, as a rule, are multi-component, it can be stated that there is no reliable information on multi-component systems in the literature. Industry is interested in the possibility of using alloys with low cost, however, with high performance properties, which is possible in the case of using chemical elements of technical purity, industrial waste or scrap for their preparation. First of all, it concerns aluminum alloys, as the volume of their consumption is the highest among alloys of non-ferrous metals. In addition, the number of applications made of these alloys is continuously growing. The purpose of this paper is to perform a comparative analysis of the non-equilibrium phase diagrams of aluminum-based alloys with an increased content of impurities in comparison with their equilibrium counterparts known from the published scientific literature. In the process of work, equilibrium and non-equilibrium phase diagrams of aluminum with basic alloying elements and the most frequent harmful impurities are constructed.
{"title":"Analysis of the phase composition and the structure of aluminum alloys with increased content of impurities","authors":"Y. Mansurov, J. Rakhmonov","doi":"10.17580/NFM.2018.02.07","DOIUrl":"https://doi.org/10.17580/NFM.2018.02.07","url":null,"abstract":"The development of fundamental knowledge that allows making proper correlation among the chemical composition, structure and properties of non-ferrous alloys is a priority task for the metallurgy of nonferrous metals and alloys, as this knowledge makes the main contribution to the development of this subject and is a powerful tool for expanding the areas of their application. A variant of the establishment of regularities in metal science is the study of phase equilibria, transformations in the temperature range and compositions of metallic systems. In the scientific literature there is a lot of information on the results of studies of twoand three-component alloys in order to construct equilibrium phase diagrams. However, the non-equilibrium crystallization of alloys, and thus, the non-equilibrium phase diagrams are of greater practical interest from the point of view of industrial production. Taking into account that the compositions of industrial alloys, as a rule, are multi-component, it can be stated that there is no reliable information on multi-component systems in the literature. Industry is interested in the possibility of using alloys with low cost, however, with high performance properties, which is possible in the case of using chemical elements of technical purity, industrial waste or scrap for their preparation. First of all, it concerns aluminum alloys, as the volume of their consumption is the highest among alloys of non-ferrous metals. In addition, the number of applications made of these alloys is continuously growing. The purpose of this paper is to perform a comparative analysis of the non-equilibrium phase diagrams of aluminum-based alloys with an increased content of impurities in comparison with their equilibrium counterparts known from the published scientific literature. In the process of work, equilibrium and non-equilibrium phase diagrams of aluminum with basic alloying elements and the most frequent harmful impurities are constructed.","PeriodicalId":19653,"journal":{"name":"Nonferrous Metals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2018-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47015849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. G. Partyko, M. I. Gubanova, D. V. Tolkachyova, V. Deev
{"title":"Influence of the shape of hydrogen-containing inclusions on the intergranular corrosion process of the Al – Si alloy system","authors":"E. G. Partyko, M. I. Gubanova, D. V. Tolkachyova, V. Deev","doi":"10.17580/NFM.2018.02.03","DOIUrl":"https://doi.org/10.17580/NFM.2018.02.03","url":null,"abstract":"","PeriodicalId":19653,"journal":{"name":"Nonferrous Metals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2018-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45888629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The tuyere in a protective shell to convert the nickel and copper mattes","authors":"Y. Korol, S. Naboychenko","doi":"10.17580/NFM.2018.02.01","DOIUrl":"https://doi.org/10.17580/NFM.2018.02.01","url":null,"abstract":"","PeriodicalId":19653,"journal":{"name":"Nonferrous Metals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2018-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49561949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Kasimtsev, Tula Russia Metsintez Llc, S. Yudin, S. Volodko, A. Alpatov
Non-ferrous Metals. 2018. No. 2. pp. 29–36 16. Aksenov A. A., Mansurov Yu. N., Ivanov D. O., Reva V. P., Kadyrova D. S., Shuvatkin R. K., Kim E. D. Mechanical Alloying of Secondary Raw Material for Foam Aluminum Production. Metallurgist. 2017. Vol. 61, Iss. 5–6. pp 475–484. 17. Thermo-Calc Software. Available at:www.thermocalc. com (accessed: 23.11.2018). 18. Khansen M., Anderko K. The structures of binary alloys. Vol. 1. Translated from English. Moscow : Metallurgizdat, 1962. 608 p. 19. Mondolfo L. F. Aluminum Alloys: Structure and Properties. Butterworths. London/Boston : Butterworth & Co Publishers Ltd., 1976. 971 p. 20. Moore D. M., Morris L. R. Superplastic aluminium alloy products and method of preparation. Patent UK, No. 1580281. 1978. 21. Moore D. M., Morris L. R. A new superplastic aluminum sheet alloy. Materials Science and Engineering. 1980. Vol. 43, No. 1. pp. 85–92. 22. Ilenko V. M. Superplasticity of eutectic alloys on the basis of aluminum-calcium system and development of materials for superplastic forming: Dissertation ... of Candidate of Engineering Sciences. Moscow : MISiS, 1985. 264 p. 23. Swaminathan K., Padmanabhan K. A. Tensile flow and fracture behaviour of a superplastic Al–Ca–Zn alloy. J. Mater. Sci. 1990. Vol. 25, No. 11. pp. 4579–4586. 24. Perez-Prado M. T., Cristina M. C., Ruano O. A., Gonza G. Microstructural evolution of annealed Al–5%Ca–5% Zn sheet alloy. J. Mater. Sci. 1997. Vol. 32. pp. 1313–1318. 25. Kono N., Tsuchida Y., Muromachi S., Watanabe H. Study of the AlCaZn ternary phase diagram. Light Metals. 1985. Vol. 35. pp. 574–580. 26. Belov N. A., Naumova E. A., Akopyan T. K. Eutectic alloys based on aluminum: new alloying systems. Moscow : “Ore and Metals” Publishing House, 2016. 256 p. 27. Rudnev V. S., Yarovaya T. P., Nedozorov P. M., Mansurov Y. N. Wear-resistant oxide coatings on aluminum alloy formed in borate and silicate aqueous electrolytes by plasma electrolytic oxidation. Protection of Metals and Physical Chemistry of Surfaces. 2017. Vol. 53, Iss. 3. pp. 466–474. 28. Rudnev V. S., Nedozorov P. M., Yarovaya T. P., Mansurov Yu. N. Local plasma and electrochemical oxygenating on the example of AMg5 (АМг5) alloy. Tsvetnye Metally. 2017. No. 1. pp. 59–64. DOI: 10.17580/tsm.2017.01.10 NFM
{"title":"Powder technology for manufacturing compact blanks of Ti – Nb – Ta, Ti – Nb – Zr alloys","authors":"A. Kasimtsev, Tula Russia Metsintez Llc, S. Yudin, S. Volodko, A. Alpatov","doi":"10.17580/NFM.2018.02.06","DOIUrl":"https://doi.org/10.17580/NFM.2018.02.06","url":null,"abstract":"Non-ferrous Metals. 2018. No. 2. pp. 29–36 16. Aksenov A. A., Mansurov Yu. N., Ivanov D. O., Reva V. P., Kadyrova D. S., Shuvatkin R. K., Kim E. D. Mechanical Alloying of Secondary Raw Material for Foam Aluminum Production. Metallurgist. 2017. Vol. 61, Iss. 5–6. pp 475–484. 17. Thermo-Calc Software. Available at:www.thermocalc. com (accessed: 23.11.2018). 18. Khansen M., Anderko K. The structures of binary alloys. Vol. 1. Translated from English. Moscow : Metallurgizdat, 1962. 608 p. 19. Mondolfo L. F. Aluminum Alloys: Structure and Properties. Butterworths. London/Boston : Butterworth & Co Publishers Ltd., 1976. 971 p. 20. Moore D. M., Morris L. R. Superplastic aluminium alloy products and method of preparation. Patent UK, No. 1580281. 1978. 21. Moore D. M., Morris L. R. A new superplastic aluminum sheet alloy. Materials Science and Engineering. 1980. Vol. 43, No. 1. pp. 85–92. 22. Ilenko V. M. Superplasticity of eutectic alloys on the basis of aluminum-calcium system and development of materials for superplastic forming: Dissertation ... of Candidate of Engineering Sciences. Moscow : MISiS, 1985. 264 p. 23. Swaminathan K., Padmanabhan K. A. Tensile flow and fracture behaviour of a superplastic Al–Ca–Zn alloy. J. Mater. Sci. 1990. Vol. 25, No. 11. pp. 4579–4586. 24. Perez-Prado M. T., Cristina M. C., Ruano O. A., Gonza G. Microstructural evolution of annealed Al–5%Ca–5% Zn sheet alloy. J. Mater. Sci. 1997. Vol. 32. pp. 1313–1318. 25. Kono N., Tsuchida Y., Muromachi S., Watanabe H. Study of the AlCaZn ternary phase diagram. Light Metals. 1985. Vol. 35. pp. 574–580. 26. Belov N. A., Naumova E. A., Akopyan T. K. Eutectic alloys based on aluminum: new alloying systems. Moscow : “Ore and Metals” Publishing House, 2016. 256 p. 27. Rudnev V. S., Yarovaya T. P., Nedozorov P. M., Mansurov Y. N. Wear-resistant oxide coatings on aluminum alloy formed in borate and silicate aqueous electrolytes by plasma electrolytic oxidation. Protection of Metals and Physical Chemistry of Surfaces. 2017. Vol. 53, Iss. 3. pp. 466–474. 28. Rudnev V. S., Nedozorov P. M., Yarovaya T. P., Mansurov Yu. N. Local plasma and electrochemical oxygenating on the example of AMg5 (АМг5) alloy. Tsvetnye Metally. 2017. No. 1. pp. 59–64. DOI: 10.17580/tsm.2017.01.10 NFM","PeriodicalId":19653,"journal":{"name":"Nonferrous Metals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2018-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48707276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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