{"created":"2023-06-20T15:10:07.983595+00:00","id":39726,"links":{},"metadata":{"_buckets":{"deposit":"03a83184-d5b0-434e-94f2-dcfc83fddd48"},"_deposit":{"created_by":1,"id":"39726","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"39726"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00039726","sets":["1887:1893","1896:1898:1933:1934"]},"author_link":["500127","500126"],"item_3_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"微小重力環境下における液相シンタリング(SINTERING)"}]},"item_3_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1996-03-15","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"293","bibliographicPageStart":"283","bibliographic_titles":[{"bibliographic_title":"宇宙開発事業団技術報告"},{"bibliographic_title":"NASDA Technical Memorandum","bibliographic_titleLang":"en"}]}]},"item_3_description_16":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"スペースシャトルコロンビアに搭載したタングステン-ニッケル-鉄合金を、微小重力下でシンタリングし、液相とした。これらの合金はいくつかの理由により選択された。第1に、これらの材料については非常に多くの研究が公表されている。第2に、処理の容易さおよび理想的な微細組織により、より複雑な系で現れる多くの第2相の形成を避けることができる。第3に、これらの合金は、たとえば装甲、ペネトレーター、放射線封入、そして腐食環境下に対する被膜のように工業的に応用されている。さらに、この系の液相および固相は、約9g/立方センチメートルの密度差がある。従って、この系におけるいかなる重力効果も、他の液相シンタリング系と比べてはるかに大きいと考えられる。試料の組成は、タングステンが78wt.%から98wt.%まで5%ずつ増加させた範囲にあり、残りはニッケルと鉄を7対3の比で含んでいる。試料は1500度Cにおいてそれぞれ1分、15分、120分間シンタリングした。無重力下において、タングステン重合金では今まで見られなかったような微細組織の特徴が見られた。本論文において、異常な微細組織の特徴とその形成に関し可能な限りの説明を示した。","subitem_description_type":"Abstract"}]},"item_3_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"Tungsten-nickel-iron alloys flown aboard the space shuttle Columbia were liquid phase sintered under microgravity conditions. These alloys were selected for several reasons. First, a significant amount of work has been published on these materials. Second, the ease of processing and the idealized microstructure eliminates many second phase formation that occurs in more complex systems. Third, these alloys are used in industrial applications such as armor, penetrators, radiation containment, and cladding for corrosive environments. Lastly, the liquid and solid phases in this system has a density difference of almost 9 g/cu cm. Thus, any gravitational effects will be exaggerated compared to other liquid-phase sintering systems. The composition of the samples ranged from 78 wt. percent to 98 wt. percent tungsten in 5 wt. percent increments, with the remainder being nickel and iron in a 7 to 3 ratio. The samples were sintered for 1, 15, and 120 minutes at a temperature of 1500 C. In the absence of gravity, microstructural features were created that have never before been seen in tungsten heavy alloys. This paper presents some of the anomalous microstructural features and possible explanations for their formation.","subitem_description_type":"Other"}]},"item_3_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0000271017","subitem_description_type":"Other"}]},"item_3_description_33":{"attribute_name":"レポート番号","attribute_value_mlt":[{"subitem_description":"レポート番号: NASDA-TMR-960004","subitem_description_type":"Other"}]},"item_3_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"宇宙開発事業団"}]},"item_3_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"National Space Development Agency of Japan (NASDA)"}]},"item_3_source_id_21":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1345-7888","subitem_source_identifier_type":"ISSN"}]},"item_3_source_id_24":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00364784","subitem_source_identifier_type":"NCID"}]},"item_3_text_6":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"Pennsylvania State University P/M Laboratory"},{"subitem_text_value":"Pennsylvania State University P/M Laboratory"}]},"item_3_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Pennsylvania State University P/M Laboratory"},{"subitem_text_language":"en","subitem_text_value":"Pennsylvania State University P/M Laboratory"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"German, Randall M.","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"500126","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Iacocca, Ronald G.","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"500127","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-02-10"}],"displaytype":"detail","filename":"00271017.pdf","filesize":[{"value":"2.5 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"00271017.pdf","url":"https://jaxa.repo.nii.ac.jp/record/39726/files/00271017.pdf"},"version_id":"0c9041a6-c0af-43aa-9ab6-eeb3a22ac238"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"微小重力","subitem_subject_scheme":"Other"},{"subitem_subject":"液相シンタリング","subitem_subject_scheme":"Other"},{"subitem_subject":"タングステン-ニッケル-鉄合金","subitem_subject_scheme":"Other"},{"subitem_subject":"微細組織","subitem_subject_scheme":"Other"},{"subitem_subject":"重力効果","subitem_subject_scheme":"Other"},{"subitem_subject":"間隙","subitem_subject_scheme":"Other"},{"subitem_subject":"大型恒温電気炉","subitem_subject_scheme":"Other"},{"subitem_subject":"LIF","subitem_subject_scheme":"Other"},{"subitem_subject":"ひげ結晶","subitem_subject_scheme":"Other"},{"subitem_subject":"宇宙実験","subitem_subject_scheme":"Other"},{"subitem_subject":"microgravity","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"liquid phase sintering","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"tungsten nickel iron alloy","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"microstructure","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"gravitational effect","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"pore","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"large isothermal furnace","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"LIF","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"whisker","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"space experiment","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"technical report","resourceuri":"http://purl.org/coar/resource_type/c_18gh"}]},"item_title":"Liquid phase sintering in a microgravity environment (Sintering)","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Liquid phase sintering in a microgravity environment (Sintering)","subitem_title_language":"en"}]},"item_type_id":"3","owner":"1","path":["1893","1934"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-03-26"},"publish_date":"2015-03-26","publish_status":"0","recid":"39726","relation_version_is_last":true,"title":["Liquid phase sintering in a microgravity environment (Sintering)"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-20T20:29:32.747529+00:00"}