{"title":"Improvement of Oxidation Resistance for Ni-Base Single Crystal Superalloy TMS-238 by Suppression of Sb Segregation at Oxide/Substrate Interface Using CaO","authors":"Hirotoshi Maezawa, Chihiro Tabata, Yuji Takata, Jun Uzuhashi, Tadakatsu Ohkubo, Tadaharu Yokokawa, Hiroshi Harada, Kyoko Kawagishi, Shinsuke Suzuki","doi":"10.1007/s11663-023-02948-5","DOIUrl":"https://doi.org/10.1007/s11663-023-02948-5","url":null,"abstract":"","PeriodicalId":51126,"journal":{"name":"Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science","volume":"35 23‐24","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135432647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-06DOI: 10.1007/s11663-023-02950-x
Haijun Xu, Zhixuan Dong, Cheng Ji, Miaoyong Zhu
{"title":"The Effects of Heating on the Three-Dimensional Evolution of Microsegregation in Continuous Casting Blooms of Gear Steel","authors":"Haijun Xu, Zhixuan Dong, Cheng Ji, Miaoyong Zhu","doi":"10.1007/s11663-023-02950-x","DOIUrl":"https://doi.org/10.1007/s11663-023-02950-x","url":null,"abstract":"","PeriodicalId":51126,"journal":{"name":"Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science","volume":"32 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135589717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-03DOI: 10.1007/s11663-023-02954-7
Yongqi Sun, Lian Chen, Mao Chen, Xiaodong Ma
{"title":"Modification of Elemental Migrations of Vanadium-Bearing Slags by CaO, V2O3 and “FeO”","authors":"Yongqi Sun, Lian Chen, Mao Chen, Xiaodong Ma","doi":"10.1007/s11663-023-02954-7","DOIUrl":"https://doi.org/10.1007/s11663-023-02954-7","url":null,"abstract":"","PeriodicalId":51126,"journal":{"name":"Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science","volume":"56 S3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135818837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-31DOI: 10.1007/s11663-023-02929-8
Hamed Olia, Dirk van der Plas, Brian G. Thomas
{"title":"Publisher Correction: Pressure Distribution and Flow Rate Behavior in Continuous-Casting Stopper-Rod Systems: PFSR","authors":"Hamed Olia, Dirk van der Plas, Brian G. Thomas","doi":"10.1007/s11663-023-02929-8","DOIUrl":"https://doi.org/10.1007/s11663-023-02929-8","url":null,"abstract":"","PeriodicalId":51126,"journal":{"name":"Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135808262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-30DOI: 10.1007/s11663-023-02880-8
Sukho Kang, Takanari Ouchi, Toru H. Okabe
Abstract Platinum group metals (PGMs) are primarily used in automotive exhaust catalysts (autocatalysits). Spent autocatalysts are the most important secondary resource for PGMs. However, transporting autocatalyst scraps and recovering PGMs from the scraps are costly and time-consuming, owing to the low PGM content in spent autocatalysts. Thus, an effective PGM-concentration technology for the pretreatment of scrap prior to transport is required. This study develops a new pretreatment technique that is applied prior to the flotation concentration of PGMs in autocatalysts. This method utilizes electroless Cu plating followed by sulfurization. In the electroless Cu-plating process, which uses glyoxylic acid as a reducing agent, Cu is deposited on the PGM particles in the washcoat of the autocatalyst. During the sulfurization process, S vapor sulfurizes the deposited Cu into copper sulfide, which is hydrophobic. Prior to the experiments, thermodynamic considerations were made to predict the reactivity of Cu and the representative elements constituting the autocatalyst with S vapor, and the sulfurization conditions were designed. Sulfurization experiments were performed at 850 K (577 °C) in the presence of carbon (C), and the results show the successful conversion of only Cu to copper sulfide without sulfurizing the representative oxides (MgO, Al 2 O 3 , SiO 2 , CeO 2 , and ZrO 2 ) present in the autocatalyst. Finally, in the flotation process, the copper sulfide-coated PGMs are separated from the ceramic components of the autocatalyst, which is hydrophilic; thus, it is concentrated in the froth. Flotation experiments utilizing a microbubble flotation method were successfully performed to recover the PGM concentrates. This innovative pretreatment technique is expected to reduce the cost and time required for the entire PGM recycling process.
{"title":"Novel Concentration Process for Platinum Group Metals in Automotive Exhaust Catalyst Using Electroless Copper Plating, Sulfurization, and Flotation","authors":"Sukho Kang, Takanari Ouchi, Toru H. Okabe","doi":"10.1007/s11663-023-02880-8","DOIUrl":"https://doi.org/10.1007/s11663-023-02880-8","url":null,"abstract":"Abstract Platinum group metals (PGMs) are primarily used in automotive exhaust catalysts (autocatalysits). Spent autocatalysts are the most important secondary resource for PGMs. However, transporting autocatalyst scraps and recovering PGMs from the scraps are costly and time-consuming, owing to the low PGM content in spent autocatalysts. Thus, an effective PGM-concentration technology for the pretreatment of scrap prior to transport is required. This study develops a new pretreatment technique that is applied prior to the flotation concentration of PGMs in autocatalysts. This method utilizes electroless Cu plating followed by sulfurization. In the electroless Cu-plating process, which uses glyoxylic acid as a reducing agent, Cu is deposited on the PGM particles in the washcoat of the autocatalyst. During the sulfurization process, S vapor sulfurizes the deposited Cu into copper sulfide, which is hydrophobic. Prior to the experiments, thermodynamic considerations were made to predict the reactivity of Cu and the representative elements constituting the autocatalyst with S vapor, and the sulfurization conditions were designed. Sulfurization experiments were performed at 850 K (577 °C) in the presence of carbon (C), and the results show the successful conversion of only Cu to copper sulfide without sulfurizing the representative oxides (MgO, Al 2 O 3 , SiO 2 , CeO 2 , and ZrO 2 ) present in the autocatalyst. Finally, in the flotation process, the copper sulfide-coated PGMs are separated from the ceramic components of the autocatalyst, which is hydrophilic; thus, it is concentrated in the froth. Flotation experiments utilizing a microbubble flotation method were successfully performed to recover the PGM concentrates. This innovative pretreatment technique is expected to reduce the cost and time required for the entire PGM recycling process.","PeriodicalId":51126,"journal":{"name":"Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science","volume":"44 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136019726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-25DOI: 10.1007/s11663-023-02941-y
Jaewoo Myung, Yongsug Chung
{"title":"Degradation Behavior of MgO–C in Contact With Liquid Steel Without/With Ar Blowing","authors":"Jaewoo Myung, Yongsug Chung","doi":"10.1007/s11663-023-02941-y","DOIUrl":"https://doi.org/10.1007/s11663-023-02941-y","url":null,"abstract":"","PeriodicalId":51126,"journal":{"name":"Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science","volume":"9 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134973772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-25DOI: 10.1007/s11663-023-02939-6
David Hernández-Escobar, Alejandra Slagter, Julie Gheysen, Andreas Mortensen
Abstract We document that in unstressed, undeformed, samples of pure iron containing silica inclusions precipitated by melt deoxidation, the iron matrix and a small fraction of the silica inclusions are locally separated at room temperature by a void. Thermal cycling, picnometry, dilatometry, and nano-holotomography experiments are combined to demonstrate that those voids originate from silica inclusion/iron matrix interfacial debonding during cooldown from elevated processing temperatures, resulting from the volumetric expansion that accompanies the austenite-to-ferrite phase transformation.
{"title":"Phase Transformation-Induced Interfacial Debonding of Silica Inclusions in Iron","authors":"David Hernández-Escobar, Alejandra Slagter, Julie Gheysen, Andreas Mortensen","doi":"10.1007/s11663-023-02939-6","DOIUrl":"https://doi.org/10.1007/s11663-023-02939-6","url":null,"abstract":"Abstract We document that in unstressed, undeformed, samples of pure iron containing silica inclusions precipitated by melt deoxidation, the iron matrix and a small fraction of the silica inclusions are locally separated at room temperature by a void. Thermal cycling, picnometry, dilatometry, and nano-holotomography experiments are combined to demonstrate that those voids originate from silica inclusion/iron matrix interfacial debonding during cooldown from elevated processing temperatures, resulting from the volumetric expansion that accompanies the austenite-to-ferrite phase transformation.","PeriodicalId":51126,"journal":{"name":"Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science","volume":"49 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135169408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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