{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1390303542643824640.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.2497/jjspm.14c-sis1-02"}},{"identifier":{"@type":"URI","@value":"https://www.jstage.jst.go.jp/article/jjspm/72/Supplement/72_14C-SIS1-02/_pdf"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@language":"en","@value":"Evaluation and Suppression of Porosity in Gas-atomized Powders"}],"dc:language":"en","description":[{"type":"abstract","notation":[{"@language":"en","@value":"<p>Recently, the demand for high-quality gas-atomized powders has increased. Some particles in gas-atomized powders contain internal pores, and the presence of these pores may result in the degradation of various properties of the final product manufactured through a specific process. However, the mechanism of the internal pore formation has not yet been elucidated. In this study, various alloy powders were prepared using the gas atomization method, and their internal pores were observed using synchrotron X-ray CT. The results showed that alloys with a wider solid–liquid coexistence temperature range exhibited a higher porosity–volume ratio. This suggests that gas bubbles are more likely to be entrained during secondary droplet breakup. It was also found that introducing a small amount of hydrogen as a reducing agent into the spray gas reduced these quantities.</p>"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410303542643824643","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Yodoshi Noriharu"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Kyushu University"}]},{"@id":"https://cir.nii.ac.jp/crid/1410303542643824640","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Sakurai Ikuya"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Nagoya University"}]},{"@id":"https://cir.nii.ac.jp/crid/1410303542643824641","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Kudo Kentaro"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Kyushu University"}]},{"@id":"https://cir.nii.ac.jp/crid/1410303542643824642","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Shinagawa Kazunari"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Kyushu University"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"05328799"},{"@type":"EISSN","@value":"18809014"},{"@type":"CODEN","@value":"FOFUA2"}],"prism:publicationName":[{"@language":"en","@value":"Journal of the Japan Society of Powder and Powder Metallurgy"},{"@language":"ja","@value":"粉体および粉末冶金"},{"@language":"en","@value":"J. Jpn. Soc. Powder Powder Metallurgy"},{"@language":"ja","@value":"粉体および粉末冶金"}],"dc:publisher":[{"@language":"en","@value":"Japan Society of Powder and Powder Metallurgy"},{"@language":"ja","@value":"一般社団法人 粉体粉末冶金協会"}],"prism:publicationDate":"2025-03-15","prism:volume":"72","prism:number":"Supplement","prism:startingPage":"S99","prism:endingPage":"S104"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","url":[{"@id":"https://www.jstage.jst.go.jp/article/jjspm/72/Supplement/72_14C-SIS1-02/_pdf"}],"availableAt":"2025-03-15","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=gas-atomized%20powders","dc:title":"gas-atomized powders"},{"@id":"https://cir.nii.ac.jp/all?q=porosity","dc:title":"porosity"},{"@id":"https://cir.nii.ac.jp/all?q=synchrotron%20X-ray%20CT","dc:title":"synchrotron X-ray CT"},{"@id":"https://cir.nii.ac.jp/all?q=gas-atomized%20powders","dc:title":"gas-atomized powders"},{"@id":"https://cir.nii.ac.jp/all?q=porosity","dc:title":"porosity"},{"@id":"https://cir.nii.ac.jp/all?q=synchrotron%20X-ray%20CT","dc:title":"synchrotron X-ray CT"}],"project":[{"@id":"https://cir.nii.ac.jp/crid/1040299826882197376","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"24K01218"},{"@type":"JGN","@value":"JP24K01218"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24K01218/"}],"notation":[{"@language":"ja","@value":"ガスアトマイズ粉末の内部気孔抑制と噴霧ガスとの反応を積極利用した新奇な粉末の創製"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360292618788158464","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Increasing the amorphous yield of {(Fe 0.6 Co 0.4 ) 0.75 B 0.2 Si 0.05 } 96 Nb 4 powders by hot gas atomization"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567183870442240","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Mechanically strong nanocrystalline Fe-Si-B-P-Cu soft magnetic powder cores utilizing magnetic metallic glass as a binder"}]},{"@id":"https://cir.nii.ac.jp/crid/1360853567576816256","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Processing soft ferromagnetic metallic glasses: on novel cooling strategies in gas atomization, hydrogen enhancement, and consolidation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360855571252354432","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"XCT analysis of the influence of melt strategies on defect population in Ti–6Al–4V components manufactured by Selective Electron Beam Melting"}]},{"@id":"https://cir.nii.ac.jp/crid/1361981469385713920","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A comparative study of water and gas atomized low alloy steel powders for additive manufacturing"}]},{"@id":"https://cir.nii.ac.jp/crid/1362262944442429184","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Fabrication of Fe-based bulk metallic glass by selective laser melting: A parameter study"}]},{"@id":"https://cir.nii.ac.jp/crid/1362825894124796672","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A comparative study of Ti-6Al-4V powders for additive manufacturing by gas atomization, plasma rotating electrode process and plasma atomization"}]},{"@id":"https://cir.nii.ac.jp/crid/1363670319656891520","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Effect of atomization on surface oxide composition in 316L stainless steel powders for additive manufacturing"}]},{"@id":"https://cir.nii.ac.jp/crid/1363670320400503040","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Gas atomization of γ‐TiAl Alloy Powder for Additive Manufacturing"}]},{"@id":"https://cir.nii.ac.jp/crid/1363951794227295360","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A pore morphological study of gas-atomized Ti-6Al-4V powders by scanning electron microscopy and synchrotron X-ray computed tomography"}]},{"@id":"https://cir.nii.ac.jp/crid/1364233268604898560","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"The Effectiveness of Hot Isostatic Pressing for Closing Porosity in Titanium Parts Manufactured by Selective Electron Beam Melting"}]},{"@id":"https://cir.nii.ac.jp/crid/1364233269834784384","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Fabrication and characterization of Fe-based metallic glasses by Selective Laser Melting"}]},{"@id":"https://cir.nii.ac.jp/crid/1390006585527186816","@type":"Article","resourceType":"学術雑誌論文(journal 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