Pub Date : 2018-02-10DOI: 10.18642/jmseat_7100121915
Weiqiang Wang, Zhenshan Zhang, G. Ao
{"title":"SIMULATION STUDY ON SOLIDIFICATION OF INITIAL SHELL OF SLAB IN CONTINUOUS CASTING MOLD","authors":"Weiqiang Wang, Zhenshan Zhang, G. Ao","doi":"10.18642/jmseat_7100121915","DOIUrl":"https://doi.org/10.18642/jmseat_7100121915","url":null,"abstract":"","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83619812","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}
Pub Date : 2018-02-10DOI: 10.18642/jmseat_7100121893
S. Afonin
{"title":"STRUCTURAL-PARAMETRIC MODEL OF ELECTROELASTIC ACTUATOR FOR MECHATRONICS DEVICES OF NANOTECHNOLOGY","authors":"S. Afonin","doi":"10.18642/jmseat_7100121893","DOIUrl":"https://doi.org/10.18642/jmseat_7100121893","url":null,"abstract":"","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76536339","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}
Pub Date : 2018-02-10DOI: 10.18642/jmseat_7100121888
H. Nasu, Daichi Kinoshita, Shyohei Deguchi, Toshiki Okada, Y. Uemura, T. Hashimoto, A. Ishihara
Second harmonic generation (SHG) was observed from a thermally poled Zn-BiTe-O-F glass system measured by Maker-Fringe pattern using Nd: YAG high power pulse laser. Both Bi and F were necessary for the generation, otherwise no SHG was observable from the glasses without Bi or F. The intensity of the generation depended on the F content. In the SHG from poled glasses, short relaxation time has been neck of the practical use. Although the generation of the common thermally poled glasses relaxed within 3 days, for those of the present glasses, the generation was maintained over 1 month. This is considered to be explained by the interaction of the dipoles between the large Bi ions binding the F ions inside of glasses. HIROYUKI NASU et al. 12
{"title":"SECOND HARMONIC GENERATION (SHG) FROM THERMALLY POLED Zn-Bi-Te-O-F GLASSES WITH VERY LONG RELAXATION TIME","authors":"H. Nasu, Daichi Kinoshita, Shyohei Deguchi, Toshiki Okada, Y. Uemura, T. Hashimoto, A. Ishihara","doi":"10.18642/jmseat_7100121888","DOIUrl":"https://doi.org/10.18642/jmseat_7100121888","url":null,"abstract":"Second harmonic generation (SHG) was observed from a thermally poled Zn-BiTe-O-F glass system measured by Maker-Fringe pattern using Nd: YAG high power pulse laser. Both Bi and F were necessary for the generation, otherwise no SHG was observable from the glasses without Bi or F. The intensity of the generation depended on the F content. In the SHG from poled glasses, short relaxation time has been neck of the practical use. Although the generation of the common thermally poled glasses relaxed within 3 days, for those of the present glasses, the generation was maintained over 1 month. This is considered to be explained by the interaction of the dipoles between the large Bi ions binding the F ions inside of glasses. HIROYUKI NASU et al. 12","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78553661","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}
Pub Date : 2017-12-28DOI: 10.17265/2161-6213/2017.11-12.002
Masataka Ijiri, Daichi Shimonishi, D. Nakagawa, Kumiko Tanaka, T. Yoshimura
The multifunction cavitation (MFC) technique is referred to as a mechanical-electrochemical cavitation method because it includes both mechanical action by microjets (MJs), with high pressure from water jet cavitation (WJC), and electrochemical action by MJs, with the high-temperature reaction field of ultrasonic cavitation (UC). Recently, when MFC was applied to Cr-Mo (JIS-SCM435) steel, the corrosion resistance and compressive residual stress in rust were improved, and voids and cracks of the specimen interior were suppressed compared to that with WJC. It is of interest whether this phenomenon occurs similarly in other low-alloy steels processed by MFC. In the present study, MFC was applied to the modification of Ni-Cr-Mo steel (JIS-SNCM630) surfaces. SNCM630 processed by MFC exhibited improved corrosion resistance and compressive residual stress in rust, and voids and cracks in the interior were not generated from the specimen surface to any significant extent.
{"title":"Surface Modification of Ni-Cr-Mo Steel by Multifunction Cavitation","authors":"Masataka Ijiri, Daichi Shimonishi, D. Nakagawa, Kumiko Tanaka, T. Yoshimura","doi":"10.17265/2161-6213/2017.11-12.002","DOIUrl":"https://doi.org/10.17265/2161-6213/2017.11-12.002","url":null,"abstract":"The multifunction cavitation (MFC) technique is referred to as a mechanical-electrochemical cavitation method because it includes both mechanical action by microjets (MJs), with high pressure from water jet cavitation (WJC), and electrochemical action by MJs, with the high-temperature reaction field of ultrasonic cavitation (UC). Recently, when MFC was applied to Cr-Mo (JIS-SCM435) steel, the corrosion resistance and compressive residual stress in rust were improved, and voids and cracks of the specimen interior were suppressed compared to that with WJC. It is of interest whether this phenomenon occurs similarly in other low-alloy steels processed by MFC. In the present study, MFC was applied to the modification of Ni-Cr-Mo steel (JIS-SNCM630) surfaces. SNCM630 processed by MFC exhibited improved corrosion resistance and compressive residual stress in rust, and voids and cracks in the interior were not generated from the specimen surface to any significant extent.","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87962579","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}
Pub Date : 2017-12-28DOI: 10.17265/2161-6213/2017.11-12.001
S. Chiba, Kenta Hasegawa, M. Waki, Shohei Kurita
This paper considered the optimal arrangement on the assumption that multiple power generation systems are used in a row ahead of the realization of the wave power generation system using the DE (dielectric elastomer) which is expected to be popularized in the future. A power generation system using DEs was studied as a moored floating body, and tank tests were conducted. There are few studies on the influence of multiple moored floating bodies on each other. Those studies clarified the fluctuation, energy absorption efficiency, tension mooring force and quietness characteristics produced from differences in the arrangement of the floating bodies within the floating body group and so on utilizing the principle of double oscillating water columns. The purpose of this paper is to clarify the influence of floating body intervals and number of floating bodies on floating motion and mooring tension when a plurality of floating bodies are moored in a row perpendicular to the advancing wave direction. We also discuss the conditions of the large power generation system in actual sea areas using the DEs.
{"title":"An Experimental Study on the Motion of Floating Bodies Arranged in Series for Wave Power Generation","authors":"S. Chiba, Kenta Hasegawa, M. Waki, Shohei Kurita","doi":"10.17265/2161-6213/2017.11-12.001","DOIUrl":"https://doi.org/10.17265/2161-6213/2017.11-12.001","url":null,"abstract":"This paper considered the optimal arrangement on the assumption that multiple power generation systems are used in a row ahead of the realization of the wave power generation system using the DE (dielectric elastomer) which is expected to be popularized in the future. A power generation system using DEs was studied as a moored floating body, and tank tests were conducted. There are few studies on the influence of multiple moored floating bodies on each other. Those studies clarified the fluctuation, energy absorption efficiency, tension mooring force and quietness characteristics produced from differences in the arrangement of the floating bodies within the floating body group and so on utilizing the principle of double oscillating water columns. The purpose of this paper is to clarify the influence of floating body intervals and number of floating bodies on floating motion and mooring tension when a plurality of floating bodies are moored in a row perpendicular to the advancing wave direction. We also discuss the conditions of the large power generation system in actual sea areas using the DEs.","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86219498","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}
Pub Date : 2017-12-28DOI: 10.17265/2161-6213/2017.11-12.005
K. Neupane, R. Thapa
We have studied the electronic properties of cubical perovskite BaLiF3, by using the first principles method within the full potential linearized augmented plane wave (FP-LAPW). Here the exchange correlation effects are included through the generalized gradient approximation (GGA) exchange potential on the basis of density functional theory (DFT). The calculated structural properties such as equilibrium lattice constant, the bulk modulus and its pressure derivative are in agreement with the published results of other authors. We have found that the band gap of BaLiF3 is 6.8 eV which indicates that the insulating behavior perovskite BaLiF3.
{"title":"Study of Electronic Properties of Fluoride Perovskite BaLiF3 Using FP-LAPW Method","authors":"K. Neupane, R. Thapa","doi":"10.17265/2161-6213/2017.11-12.005","DOIUrl":"https://doi.org/10.17265/2161-6213/2017.11-12.005","url":null,"abstract":"We have studied the electronic properties of cubical perovskite BaLiF3, by using the first principles method within the full potential linearized augmented plane wave (FP-LAPW). Here the exchange correlation effects are included through the generalized gradient approximation (GGA) exchange potential on the basis of density functional theory (DFT). The calculated structural properties such as equilibrium lattice constant, the bulk modulus and its pressure derivative are in agreement with the published results of other authors. We have found that the band gap of BaLiF3 is 6.8 eV which indicates that the insulating behavior perovskite BaLiF3.","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90369939","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}
Pub Date : 2017-12-28DOI: 10.17265/2161-6213/2017.11-12.004
Ramiro Infante Martinez, A. Ramírez, R. González, R. D. D. León, L. V. Cárdenas, Esther Treviño Martínez, Alejandro Díaz Elizondo, Beatriz Reyes Vielma
This paper explores the feasibility of using in-line Raman spectrometry to monitor different monomer-solvent-polymer systems by different techniques: in-line, by an immersion probe; in-line, but externally aiming the spectrometer through the glass of the reactor wall; and off-line, taking the samples in small vials. The monitoring of chemical systems was done in the absence of polymer in order to simplify and facilitate the initial studies as well as in polymerization reactors operated with different processes: coordination polymerization of styrene-myrcene, anionic polymerization of myrcene, styrene emulsion polymerization, and methyl methacrylate—butyl acrylate mini-emulsion copolymerization. In all of these systems, it is of interest having an online monitoring technique for feedback control which would increase the productivity of the process, the quality of the product and the safety of the operation. Results show that Raman spectrometry was always capable to reproduce the trend of the process, with reasonable deviation with respect to gravimetric analysis.
{"title":"Polymerization Reactor Monitoring by In-line Raman Spectrometry","authors":"Ramiro Infante Martinez, A. Ramírez, R. González, R. D. D. León, L. V. Cárdenas, Esther Treviño Martínez, Alejandro Díaz Elizondo, Beatriz Reyes Vielma","doi":"10.17265/2161-6213/2017.11-12.004","DOIUrl":"https://doi.org/10.17265/2161-6213/2017.11-12.004","url":null,"abstract":"This paper explores the feasibility of using in-line Raman spectrometry to monitor different monomer-solvent-polymer systems by different techniques: in-line, by an immersion probe; in-line, but externally aiming the spectrometer through the glass of the reactor wall; and off-line, taking the samples in small vials. The monitoring of chemical systems was done in the absence of polymer in order to simplify and facilitate the initial studies as well as in polymerization reactors operated with different processes: coordination polymerization of styrene-myrcene, anionic polymerization of myrcene, styrene emulsion polymerization, and methyl methacrylate—butyl acrylate mini-emulsion copolymerization. In all of these systems, it is of interest having an online monitoring technique for feedback control which would increase the productivity of the process, the quality of the product and the safety of the operation. Results show that Raman spectrometry was always capable to reproduce the trend of the process, with reasonable deviation with respect to gravimetric analysis.","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76558824","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}
Pub Date : 2017-12-28DOI: 10.17265/2161-6221/2017.11-12.005
Yukihiro Nakabayashi, Y. Umeda, K. Tashiro, H. Honma, H. Kozai
Plating on the plastic is one of the important technologies to decorate exterior automotive parts and electronic devices. Conventionally, etching solution contained carcinogen hexavalent chromium obtained high adhesion strength between metal film and plastic surface to decorative the plating. On the other hand, health damage and environmental pollution from waste etching solution are occurring. For the above reasons, development of chromium free pretreatment is an urgent problem to solve this issue. In this study, we concentrated the environmentally friendly surface modification process in which atmospheric UV treatment was used to investigate effect of surface morphology and state on the ABS (acrylonitrile butadiene styrene) plastic. As a result, morphology of ABS surface was kept smooth after UV irradiation treatment. The conversion from hydrophobic to hydrophilic on the ABS surface state was confirmed by contact angle test and FT-IR spectra. Moreover, it was confirmed that appropriate amount of oxidation was necessary for metal plating on the ABS plastic, in order to obtain high adhesion strength between metal film and plastics surface.
{"title":"Influence of Modification on the ABS Plastics Using Atmospheric UV Irradiation as Plating Pretreatment","authors":"Yukihiro Nakabayashi, Y. Umeda, K. Tashiro, H. Honma, H. Kozai","doi":"10.17265/2161-6221/2017.11-12.005","DOIUrl":"https://doi.org/10.17265/2161-6221/2017.11-12.005","url":null,"abstract":"Plating on the plastic is one of the important technologies to decorate exterior automotive parts and electronic devices. Conventionally, etching solution contained carcinogen hexavalent chromium obtained high adhesion strength between metal film and plastic surface to decorative the plating. On the other hand, health damage and environmental pollution from waste etching solution are occurring. For the above reasons, development of chromium free pretreatment is an urgent problem to solve this issue. In this study, we concentrated the environmentally friendly surface modification process in which atmospheric UV treatment was used to investigate effect of surface morphology and state on the ABS (acrylonitrile butadiene styrene) plastic. As a result, morphology of ABS surface was kept smooth after UV irradiation treatment. The conversion from hydrophobic to hydrophilic on the ABS surface state was confirmed by contact angle test and FT-IR spectra. Moreover, it was confirmed that appropriate amount of oxidation was necessary for metal plating on the ABS plastic, in order to obtain high adhesion strength between metal film and plastics surface.","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85745210","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}
Pub Date : 2017-12-28DOI: 10.17265/2161-6213/2017.11-12.003
T. Malsawmtluanga, R. Thapa
The spin-polarized calculations of FP-LAPW (full-potential linearized augmented plane-wave) method based on DFT, the mBJ (modified Becke-Johnson) exchange potential by Tran and Blaha was employed with Perdew Burke-Eenzehof GGA (generalized gradient approximation) and LSDA (local spin density approximation) to analyse the half-metallicity of GeLiCa. We found that in both GGA-mBJ and LSDA-mBJ calculations the GeLiCa alloy is HMF (half-metallic ferromagnet) with a magnetic moment of 1 μB per formula unit at equilibrium lattice constant. The mBJ calculations for both GGA and LSDA yielded an increase in the energy gap EBG around the Fermi level and a more accurate magnetic moment of 1 μB with respect to the GGA and LSDA results.
{"title":"Study of Half-Metallicity of Half-Heusler GeLiCa by Using mBJ Potential Method","authors":"T. Malsawmtluanga, R. Thapa","doi":"10.17265/2161-6213/2017.11-12.003","DOIUrl":"https://doi.org/10.17265/2161-6213/2017.11-12.003","url":null,"abstract":"The spin-polarized calculations of FP-LAPW (full-potential linearized augmented plane-wave) method based on DFT, the mBJ (modified Becke-Johnson) exchange potential by Tran and Blaha was employed with Perdew Burke-Eenzehof GGA (generalized gradient approximation) and LSDA (local spin density approximation) to analyse the half-metallicity of GeLiCa. We found that in both GGA-mBJ and LSDA-mBJ calculations the GeLiCa alloy is HMF (half-metallic ferromagnet) with a magnetic moment of 1 μB per formula unit at equilibrium lattice constant. The mBJ calculations for both GGA and LSDA yielded an increase in the energy gap EBG around the Fermi level and a more accurate magnetic moment of 1 μB with respect to the GGA and LSDA results.","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87988180","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}
Pub Date : 2017-12-28DOI: 10.17265/2161-6221/2017.11-12.004
A. Dmitriev, L. Leontiev
We consider sources of raw materials for producing pigmentary titanium dioxide in Russia. We found that Russia has huge balanced stocks of titan-containing ores, including ilmenite, titaniferous, and leucoxene. We show the main fields and make recommendations about their development. We also give examples of pigmentary titanium dioxide production from different titaniferous ores from the Russian Federation, and suggest possible organization of production of pigmentary titanium dioxide in the Ural region of Russia.
{"title":"Processing of Pigmentary Titanium Dioxide from Titaniferous Minerals","authors":"A. Dmitriev, L. Leontiev","doi":"10.17265/2161-6221/2017.11-12.004","DOIUrl":"https://doi.org/10.17265/2161-6221/2017.11-12.004","url":null,"abstract":"We consider sources of raw materials for producing pigmentary titanium dioxide in Russia. We found that Russia has huge balanced stocks of titan-containing ores, including ilmenite, titaniferous, and leucoxene. We show the main fields and make recommendations about their development. We also give examples of pigmentary titanium dioxide production from different titaniferous ores from the Russian Federation, and suggest possible organization of production of pigmentary titanium dioxide in the Ural region of Russia.","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83512562","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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