Journal of The Japan Institute of Metals最新文献_第9页

Effect of Ions Eluted from Metal Surface on Transformation and Growth of Calcium Carbonate Polymorphisms 金属表面离子洗脱对碳酸钙相变和生长的影响

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2017-01-01 DOI: 10.2320/JINSTMET.J2016045

R. Hashimoto, M. Morita, O. Umezawa, Shin-ichi Motoda

{"title":"Effect of Ions Eluted from Metal Surface on Transformation and Growth of Calcium Carbonate Polymorphisms","authors":"R. Hashimoto, M. Morita, O. Umezawa, Shin-ichi Motoda","doi":"10.2320/JINSTMET.J2016045","DOIUrl":"https://doi.org/10.2320/JINSTMET.J2016045","url":null,"abstract":"The amounts of calcium carbonate adhered on sheets (PVC, carbon steel, Type 316 stainless steel, and Cu) and coated steels sheets (Cu, Zn, Ni, Ni–P, and Ni–W–P coated steels) were investigated in the synthesis solution. The transformation and crystal growth of the calcium carbonate were different among the materials. The primary form in the adhered polymorphisms was calcite on PVC, carbon steel, Type 316 stainless steel, Cu, and Cu coated steel, and aragonite on Zn, Ni, Ni–P, and Ni–W–P coated steels, and vaterite was not primary form on all materials. The materials, on which the primary form in the adhesion polymorphisms is calcite, showed large adhesion amounts because calcite is stable phase and its solubility is lower than the other polymorphisms. The crystal growths of the specific polymorphisms on some materials were inhibited, and the irregular shapes of their polymorphisms formed: calcite adhered on carbon steel and Ni, Ni–P, Ni–W–P coated steels, aragonite adhered on Zn, Ni–P, and Ni–W–P coated steels became the irregular shape. The comprised elements of the material surfaces were detected at the surface of the calcium carbonate crystals adhered on the materials. The transformation and crystal growth are affected by the elution ions from the material surfaces, and the effects of eluted ions (Fe2+, Cu2+, Zn2+, Ni2+, and PO4) from these materials were almost same with the ones of previous studies. To reduce the adhesion amount of calcium carbonate, the material comprised of the elements, which shows the inhibitor effects of the transformation and the crystal growths of many kinds of polymorphisms, is better. [doi:10.2320/ jinstmet.J2016045]","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73905923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Development of a Process for Recycling Platinum Group Metals Using Molten Alkali Metal Chlorides 熔融碱金属氯化物回收铂族金属工艺的开发

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2017-01-01 DOI: 10.2320/JINSTMET.JE201602

Kenya Fujima, T. Morimoto, Hiroyuki Itoigawa, Dai Becchaku

{"title":"Development of a Process for Recycling Platinum Group Metals Using Molten Alkali Metal Chlorides","authors":"Kenya Fujima, T. Morimoto, Hiroyuki Itoigawa, Dai Becchaku","doi":"10.2320/JINSTMET.JE201602","DOIUrl":"https://doi.org/10.2320/JINSTMET.JE201602","url":null,"abstract":"The platinum group metals (PGM: platinum, palladium, rhodium, ruthenium, iridium, and osmium) are widely used in electrical devices and in catalysts. It is important that sustainable methods of recycling PGMs in waste electrical devices and catalysts are developed because PGMs are expensive and new sources in the Earth's crust are limited. In this work, processes for recycling ruthenium, platinum, palladium, and rhodium based on chlorination in molten chloride flux are investigated. Scrap containing ruthenium was chlorinated using Cl2 at 873 K in molten LiCl–NaCl, then the ruthenium was reduced using flowing H2 in molten salt. As a result 99.96 mass% Ru powder was obtained. Platinum, palladium, or rhodium was chlorinated using Cl2 at 973 K in molten NaCl– CsCl. The chloride complex containing Pt, Pd, and Rh at the desired composition was then treated using one of two processes. In one, the complex was oxidized using Na2CO3 and then reduced on granular CaCO3 in flowing H2 at 1473 K. In the other, the complex in the solid state was directly reduced using flowing H2. Both processes gave PGM–alloy powder products with the desired compositions. The morphologies of the PGM powders could be controlled in recycling process. [doi:10.2320/jinstmet.JE201602]","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89692071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Continuous Counter-Current Foam Separation of Pd（II） in the Presence of Thiodiglycolamide Extractant 硫代二醇酰胺萃取剂存在下Pd(II)的连续逆流泡沫分离

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2017-01-01 DOI: 10.2320/JINSTMET.JE201601

T. Kinoshita, Yuzo Ishigaki

引用次数: 1

Study on the Generation of the Intermetallic Compound and the Occurrence of the Whiskers Observed in the Double-Layer Plating System （Sn/Cu） Sn/Cu双层镀层中金属间化合物的生成及晶须出现的研究

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2017-01-01 DOI: 10.2320/JINSTMET.J2016055

Y. Sakamoto, S. Takemura, Wataru Yamazaki, Masao Shimura, S. Ishihara

{"title":"Study on the Generation of the Intermetallic Compound and the Occurrence of the Whiskers Observed in the Double-Layer Plating System （Sn/Cu）","authors":"Y. Sakamoto, S. Takemura, Wataru Yamazaki, Masao Shimura, S. Ishihara","doi":"10.2320/JINSTMET.J2016055","DOIUrl":"https://doi.org/10.2320/JINSTMET.J2016055","url":null,"abstract":"Many research studies have been conducted so far about the occurrence of the whiskers in Sn-plating. However, most of them have paid attention to the generation mechanism of the whiskers, and to the time variations of both the number and lengths of the whiskers. Very few research studies have been conducted on the correlation between the generation of the intermetallic compound and the occurrence of the whiskers. In the present study, double-layer plating(Sn/Cu thin films)was electrodeposited on the 7-3 brass substrate to investigate quantitatively the time variation of the amount of the intermetallic compound generated in the Sn plating film. It was clarified that the relation between the amount of the intermetallic compound and the elapsed time can be expressed by the two different straight lines on the log-log graph. In the early stage until the first seven days after the plating processing, the rate of the generation amount of the intermetallic compound was faster than that in the next stage. When the amount of the intermetallic compound per area is less than 5% , the whisker density increased with an increase in the amount of the intermetallic compound per area. On the other hand, in more than 5% of domains of the intermetallic compound per area, a clear correlation between them was not observed. It is considered that the internal compressive stresses increase in the inside of the Sn plating with an increase in the amount of the intermetallic compound. It is inferred that the whiskers arise on the Sn-plating film to release the above internal compressive stress. Seven days later after the plating processing, the generation rate of the amount of the intermetallic compound decreased because of the change in the diffusion mechanism, i.e. from the grain boundary diffusion to the volume one. Corresponding to the rate of the amount of the intermetallic compound, the rate of the whiskers formation was also suppressed. [doi:10.2320/jinstmet.J2016055]","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75214046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Constitution of Stable and Metastable Quasi Binary Phase Diagrams for TmFeO 3 -ScFeO 3 System by Undercooling Solidification Using the Containerless Technique 用无容器技术制备过冷凝固tmfeo3 - scfeo3体系的稳定和亚稳准二元相图

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2017-01-01 DOI: 10.2320/JINSTMET.JAW201707

Junya Takasaki, K. Kuribayashi, S. Ozawa

{"title":"Constitution of Stable and Metastable Quasi Binary Phase Diagrams for TmFeO 3 -ScFeO 3 System by Undercooling Solidification Using the Containerless Technique","authors":"Junya Takasaki, K. Kuribayashi, S. Ozawa","doi":"10.2320/JINSTMET.JAW201707","DOIUrl":"https://doi.org/10.2320/JINSTMET.JAW201707","url":null,"abstract":"Spherical samples of Tm 1 ︲ x Sc x FeO 3 were solidiﬁed from the undercooled melt under the containerless state using an aerody - namic levitation （ ADL ） furnace. The change of solidiﬁcation behavior from double recalescence to single recalescence and powder X ︲ ray diffraction （ XRD ） analysis of as ︲ solidiﬁed samples revealed that metastable hexagonal LnFeO 3 （ h ︲ LnFeO 3 ） stabilizes with increasing of mole fraction of Sc. The reason for this stabilization was ascribed to the decrease of the difference in the liquidus temperatures of stable orthorhombic LnFeO 3 （ o ︲ LnFeO 3 ） and metastable h ︲ LnFeO 3 phases. Annealing the as ︲ solidiﬁed samples at 1473 K for 1 hour resulted in the two ︲ phase coexistent states of o ︲ LnFeO 3 and garnet （ c ︲ A 3 B 5 O 12 ） at 0 ＜ x ＜ 0 . 3, c ︲ A 3 B 5 O 12 and h ︲ LnFeO 3 at 0 . 3 ＜ x ＜ 0 . 5 , and h ︲ LnFeO 3 and c ︲ ScFeO 3 at 0 . 5 ＜ x ＜ 1 . 0. Based on these results, we proposed the quasi binary phase diagram between TmFeO 3 and ScFeO 3 . ［ doi:10 . 2320 / jinstmet.JAW201707 ］（）","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80410211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Decrease of Concentration Boundary Layer Thickness by Using Vibrating Electromagnetic Force 振动电磁力降低浓度边界层厚度的研究

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2017-01-01 DOI: 10.2320/JINSTMET.J2017022

T. Yokota, A. Maruyama, Takashi Yamada, K. Iwai

{"title":"Decrease of Concentration Boundary Layer Thickness by Using Vibrating Electromagnetic Force","authors":"T. Yokota, A. Maruyama, Takashi Yamada, K. Iwai","doi":"10.2320/JINSTMET.J2017022","DOIUrl":"https://doi.org/10.2320/JINSTMET.J2017022","url":null,"abstract":"For clarification of vibrating electromagnetic force effect on concentration boundary layer thickness formed near solid–liquid interface, a metal copper working as an anodic electrode was dissolved into an electrolyte aqueous solution under the imposition of a vibrating electromagnetic force. For its excitation, a current composed of DC and AC components and a static magnetic field were simultaneously imposed on an electrolyte aqueous solution. Because the copper divalent ions concentration is related with brightness of the solution by Lambert–Beer law, brightness of the recorded data using a video camera was directly used for evaluation of the concentration boundary layer thickness formed near the anodic electrode. The concentration boundary layer thicknesses formed under the imposition of the DC current and the static magnetic field, under the imposition of the DC & AC superimposing current without a static magnetic field, and under the imposition of the DC current without a static magnetic field were almost the same, while that formed under the imposition of the DC & AC superimposing current and the static magnetic field was thinner in comparison with the other three conditions. Hydrodynamic instability induced by the vibrating electromagnetic force through a large velocity gradient when the DC & AC superimposing current and the static magnetic field were imposed on the solution might be the reason of the thinner concentration boundary layer. This might be a new tool for controlling mass transfer rate in a concentration boundary layer. [doi:10.2320/jinstmet.J2017022]","PeriodicalId":17337,"journal":{"name":"Journal of The Japan Institute of Metals","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83289610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Thermodynamic Consideration on Steam Oxidation Resistance of Austenitic Stainless Steels Forming Intermetallic Compound 奥氏体不锈钢形成金属间化合物抗蒸汽氧化的热力学考虑

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2017-01-01 DOI: 10.2320/JINSTMET.JB201703

Norifumi Kochi, Y. Nishiyama

引用次数: 0

高電流密度下における硫酸酸性浴からの Zn-Ni 合金析出挙動高电流密度下从硫酸酸性浴中析出Zn-Ni合金的行为

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2016-11-01 DOI: 10.2320/JINSTMET.J2015024

S. Ando

引用次数: 5

純MgおよびMg-Al-Zn合金における金属内部でのMg水素化物の生成纯Mg和Mg- al - zn合金金属内部Mg氢化物的生成

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2016-10-28 DOI: 10.2320/JINSTMET.JD201603

亮太近藤, 俊祐佐竹, 孝之田中, 博之竹下

引用次数: 1

Multi-step internal nitriding of molybdenum-zirconium alloys 钼锆合金的多级内氮化

4区材料科学

Journal of The Japan Institute of Metals Pub Date : 2016-09-30 DOI: 10.2320/JINSTMET.J2016034

M. Nagae, Naoko Ise, J. Takada, Y. Hiraoka

引用次数: 2