Phase stability of Yb-Gd-Si ternary alloys at elevated temperature
A ternary alloy with an Yb-Gd-Si composition was designed using thermodynamic calculation software. The ternary alloy with two different steady-state phases (Yb:Gd:Si = 25:18:57 and 19:23:58 at%) was successfully fabricated using arc melting. Oxidation tests were carried out at 1200 °C for 1, 2, 4,...
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| Veröffentlicht in: | Journal of alloys and compounds 2020-06, Vol.825, p.154098, Article 154098 |
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| container_title | Journal of alloys and compounds |
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| creator | Morigayama, Hiroki Miyazaki, Toshihisa Usami, Syo Arai, Yutaro Tsunoura, Toru Inoue, Ryo Aoki, Takuya Tamura, Ryuji Kogo, Yasuo |
| description | A ternary alloy with an Yb-Gd-Si composition was designed using thermodynamic calculation software. The ternary alloy with two different steady-state phases (Yb:Gd:Si = 25:18:57 and 19:23:58 at%) was successfully fabricated using arc melting. Oxidation tests were carried out at 1200 °C for 1, 2, 4, and 8 h in air. Thermogravimetric and microstructural analyses indicated that weight gain during oxidation at 1200 °C was suppressed compared with that for the Yb–Si alloy (Yb3Si5) owing to the formation of complex oxides in the Yb2O3–Gd2O3–SiO2 system. In addition, the phase stability of Yb-Gd-Si was higher than that of Yb3Si5 because the growth of a eutectic phase in Yb-Gd-Si during oxidation was prevented compared with Yb3Si5. The addition of Gd in Yb–Si alloy was effective in improving phase stability and oxidation behavior.
•Yb-Gd-Si alloy designed by thermodynamic calculation is fabricated by arc-melting.•The surface scale containing complex oxides is formed on oxidized Yb-Gd-Si alloy.•The addition of Gd improves the oxidation behavior of Yb–Si alloy. |
| doi_str_mv | 10.1016/j.jallcom.2020.154098 |
| format | Article |
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•Yb-Gd-Si alloy designed by thermodynamic calculation is fabricated by arc-melting.•The surface scale containing complex oxides is formed on oxidized Yb-Gd-Si alloy.•The addition of Gd improves the oxidation behavior of Yb–Si alloy.</description><identifier>ISSN: 0925-8388</identifier><identifier>EISSN: 1873-4669</identifier><identifier>DOI: 10.1016/j.jallcom.2020.154098</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Alloy ; Alloys ; Arc-melting ; Electric arc melting ; Gadolinium ; Gadolinium oxides ; Gadolinium silicide ; High temperature ; Oxidation ; Oxidation tests ; Phase diagram ; Phase stability ; Silicide ; Silicon base alloys ; Silicon dioxide ; Ternary alloys ; Ternary systems ; Ytterbium</subject><ispartof>Journal of alloys and compounds, 2020-06, Vol.825, p.154098, Article 154098</ispartof><rights>2020 Elsevier B.V.</rights><rights>Copyright Elsevier BV Jun 5, 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c403t-14f3f5247f6f708b3335ae1a7eb9cc67ddaaa60e40d6211bdab45da8a2b392403</citedby><cites>FETCH-LOGICAL-c403t-14f3f5247f6f708b3335ae1a7eb9cc67ddaaa60e40d6211bdab45da8a2b392403</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jallcom.2020.154098$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Morigayama, Hiroki</creatorcontrib><creatorcontrib>Miyazaki, Toshihisa</creatorcontrib><creatorcontrib>Usami, Syo</creatorcontrib><creatorcontrib>Arai, Yutaro</creatorcontrib><creatorcontrib>Tsunoura, Toru</creatorcontrib><creatorcontrib>Inoue, Ryo</creatorcontrib><creatorcontrib>Aoki, Takuya</creatorcontrib><creatorcontrib>Tamura, Ryuji</creatorcontrib><creatorcontrib>Kogo, Yasuo</creatorcontrib><title>Phase stability of Yb-Gd-Si ternary alloys at elevated temperature</title><title>Journal of alloys and compounds</title><description>A ternary alloy with an Yb-Gd-Si composition was designed using thermodynamic calculation software. The ternary alloy with two different steady-state phases (Yb:Gd:Si = 25:18:57 and 19:23:58 at%) was successfully fabricated using arc melting. Oxidation tests were carried out at 1200 °C for 1, 2, 4, and 8 h in air. Thermogravimetric and microstructural analyses indicated that weight gain during oxidation at 1200 °C was suppressed compared with that for the Yb–Si alloy (Yb3Si5) owing to the formation of complex oxides in the Yb2O3–Gd2O3–SiO2 system. In addition, the phase stability of Yb-Gd-Si was higher than that of Yb3Si5 because the growth of a eutectic phase in Yb-Gd-Si during oxidation was prevented compared with Yb3Si5. The addition of Gd in Yb–Si alloy was effective in improving phase stability and oxidation behavior.
•Yb-Gd-Si alloy designed by thermodynamic calculation is fabricated by arc-melting.•The surface scale containing complex oxides is formed on oxidized Yb-Gd-Si alloy.•The addition of Gd improves the oxidation behavior of Yb–Si alloy.</description><subject>Alloy</subject><subject>Alloys</subject><subject>Arc-melting</subject><subject>Electric arc melting</subject><subject>Gadolinium</subject><subject>Gadolinium oxides</subject><subject>Gadolinium silicide</subject><subject>High temperature</subject><subject>Oxidation</subject><subject>Oxidation tests</subject><subject>Phase diagram</subject><subject>Phase stability</subject><subject>Silicide</subject><subject>Silicon base alloys</subject><subject>Silicon dioxide</subject><subject>Ternary alloys</subject><subject>Ternary systems</subject><subject>Ytterbium</subject><issn>0925-8388</issn><issn>1873-4669</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqFkE9LAzEQxYMoWKsfQVjwvDV_d7Mn0aJVKCioB09hNpnFLNtuTVKh396U9u5pYOa9x7wfIdeMzhhl1W0_62EY7LiaccrzTkna6BMyYboWpayq5pRMaMNVqYXW5-Qixp5SyhrBJuTh7RsiFjFB6wefdsXYFV9tuXDluy8ShjWEXZHTx10sIBU44C8kdPm02mCAtA14Sc46GCJeHeeUfD49fsyfy-Xr4mV-vyytpCKVTHaiU1zWXdXVVLdCCAXIoMa2sbaqnQOAiqKkruKMtQ5aqRxo4K1oeI6YkptD7iaMP1uMyfTjNj84RMOlkFppxXhWqYPKhjHGgJ3ZBL_KLQyjZo_L9OaIy-xxmQOu7Ls7-DBX-PUYTLQe1xadD2iTcaP_J-EPBJ11ig</recordid><startdate>20200605</startdate><enddate>20200605</enddate><creator>Morigayama, Hiroki</creator><creator>Miyazaki, Toshihisa</creator><creator>Usami, Syo</creator><creator>Arai, Yutaro</creator><creator>Tsunoura, Toru</creator><creator>Inoue, Ryo</creator><creator>Aoki, Takuya</creator><creator>Tamura, Ryuji</creator><creator>Kogo, Yasuo</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20200605</creationdate><title>Phase stability of Yb-Gd-Si ternary alloys at elevated temperature</title><author>Morigayama, Hiroki ; Miyazaki, Toshihisa ; Usami, Syo ; Arai, Yutaro ; Tsunoura, Toru ; Inoue, Ryo ; Aoki, Takuya ; Tamura, Ryuji ; Kogo, Yasuo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c403t-14f3f5247f6f708b3335ae1a7eb9cc67ddaaa60e40d6211bdab45da8a2b392403</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Alloy</topic><topic>Alloys</topic><topic>Arc-melting</topic><topic>Electric arc melting</topic><topic>Gadolinium</topic><topic>Gadolinium oxides</topic><topic>Gadolinium silicide</topic><topic>High temperature</topic><topic>Oxidation</topic><topic>Oxidation tests</topic><topic>Phase diagram</topic><topic>Phase stability</topic><topic>Silicide</topic><topic>Silicon base alloys</topic><topic>Silicon dioxide</topic><topic>Ternary alloys</topic><topic>Ternary systems</topic><topic>Ytterbium</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Morigayama, Hiroki</creatorcontrib><creatorcontrib>Miyazaki, Toshihisa</creatorcontrib><creatorcontrib>Usami, Syo</creatorcontrib><creatorcontrib>Arai, Yutaro</creatorcontrib><creatorcontrib>Tsunoura, Toru</creatorcontrib><creatorcontrib>Inoue, Ryo</creatorcontrib><creatorcontrib>Aoki, Takuya</creatorcontrib><creatorcontrib>Tamura, Ryuji</creatorcontrib><creatorcontrib>Kogo, Yasuo</creatorcontrib><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of alloys and compounds</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Morigayama, Hiroki</au><au>Miyazaki, Toshihisa</au><au>Usami, Syo</au><au>Arai, Yutaro</au><au>Tsunoura, Toru</au><au>Inoue, Ryo</au><au>Aoki, Takuya</au><au>Tamura, Ryuji</au><au>Kogo, Yasuo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Phase stability of Yb-Gd-Si ternary alloys at elevated temperature</atitle><jtitle>Journal of alloys and compounds</jtitle><date>2020-06-05</date><risdate>2020</risdate><volume>825</volume><spage>154098</spage><pages>154098-</pages><artnum>154098</artnum><issn>0925-8388</issn><eissn>1873-4669</eissn><abstract>A ternary alloy with an Yb-Gd-Si composition was designed using thermodynamic calculation software. The ternary alloy with two different steady-state phases (Yb:Gd:Si = 25:18:57 and 19:23:58 at%) was successfully fabricated using arc melting. Oxidation tests were carried out at 1200 °C for 1, 2, 4, and 8 h in air. Thermogravimetric and microstructural analyses indicated that weight gain during oxidation at 1200 °C was suppressed compared with that for the Yb–Si alloy (Yb3Si5) owing to the formation of complex oxides in the Yb2O3–Gd2O3–SiO2 system. In addition, the phase stability of Yb-Gd-Si was higher than that of Yb3Si5 because the growth of a eutectic phase in Yb-Gd-Si during oxidation was prevented compared with Yb3Si5. The addition of Gd in Yb–Si alloy was effective in improving phase stability and oxidation behavior.
•Yb-Gd-Si alloy designed by thermodynamic calculation is fabricated by arc-melting.•The surface scale containing complex oxides is formed on oxidized Yb-Gd-Si alloy.•The addition of Gd improves the oxidation behavior of Yb–Si alloy.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jallcom.2020.154098</doi></addata></record> |
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| subjects | Alloy Alloys Arc-melting Electric arc melting Gadolinium Gadolinium oxides Gadolinium silicide High temperature Oxidation Oxidation tests Phase diagram Phase stability Silicide Silicon base alloys Silicon dioxide Ternary alloys Ternary systems Ytterbium |
| title | Phase stability of Yb-Gd-Si ternary alloys at elevated temperature |
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