Thermo-dynamic analysis on solid-state reduction of CaO particles dispersed in Mg–Al alloy
► We clarified formation mechanism of Al 2Ca compounds via solid-state reaction between CaO and Mg–Al alloy by calculating standard free energy. AZ61B alloy powder composite with Al 2Ca fine dispersoids was developed by using CaO additive particles as raw materials. For synthesis of Al 2Ca in the ma...
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| Veröffentlicht in: | Materials chemistry and physics 2011-09, Vol.129 (1), p.631-640 |
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| creator | Kondoh, Katsuyoshi Fujita, Junji Umeda, Junko Imai, Hisashi Enami, Keitaro Ohara, Masaki Igarashi, Takanori |
| description | ► We clarified formation mechanism of Al
2Ca compounds via solid-state reaction between CaO and Mg–Al alloy by calculating standard free energy.
AZ61B alloy powder composite with Al
2Ca fine dispersoids was developed by using CaO additive particles as raw materials. For synthesis of Al
2Ca in the matrix, CaO particles were elementally and uniformly mixed with AZ61B alloy chips via ECABMA process. The mechanism in formation of Al
2Ca intermetallics was investigated by XRD and SEM–EDS analysis when AZ61B alloy green compacts containing CaO additives were heat treated at 380–625
°C in argon gas atmosphere. A change in a standard free energy in formation of Al
2Ca via reaction between CaO and Mg–Al alloy was calculated by using a standard Gibbs free energy of each element contained in the green compact. Both of the theoretical analysis by thermo-dynamic and experimental investigation clarified that Al
2Ca and MgO were synthesized by employing Mg–Al alloy, not pure Mg as the matrix material. Microstructural analysis indicated that needle-like intermetallic of (Mg,Al)
2Ca or Al
3Ca
4Mg were formed as intermediately created compounds in the solid-state reaction between CaO particles and Mg–Al alloy to synthesize Al
2Ca and MgO dispersoids. |
| doi_str_mv | 10.1016/j.matchemphys.2011.05.017 |
| format | Article |
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2Ca compounds via solid-state reaction between CaO and Mg–Al alloy by calculating standard free energy.
AZ61B alloy powder composite with Al
2Ca fine dispersoids was developed by using CaO additive particles as raw materials. For synthesis of Al
2Ca in the matrix, CaO particles were elementally and uniformly mixed with AZ61B alloy chips via ECABMA process. The mechanism in formation of Al
2Ca intermetallics was investigated by XRD and SEM–EDS analysis when AZ61B alloy green compacts containing CaO additives were heat treated at 380–625
°C in argon gas atmosphere. A change in a standard free energy in formation of Al
2Ca via reaction between CaO and Mg–Al alloy was calculated by using a standard Gibbs free energy of each element contained in the green compact. Both of the theoretical analysis by thermo-dynamic and experimental investigation clarified that Al
2Ca and MgO were synthesized by employing Mg–Al alloy, not pure Mg as the matrix material. Microstructural analysis indicated that needle-like intermetallic of (Mg,Al)
2Ca or Al
3Ca
4Mg were formed as intermediately created compounds in the solid-state reaction between CaO particles and Mg–Al alloy to synthesize Al
2Ca and MgO dispersoids.</description><identifier>ISSN: 0254-0584</identifier><identifier>EISSN: 1879-3312</identifier><identifier>DOI: 10.1016/j.matchemphys.2011.05.017</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Additives ; Alloying elements ; Compacts ; Dispersions ; Heat treatment ; Intermetallic compounds ; Intermetallics ; Magnesium base alloys ; Microstructure ; Particulate composites ; Powder metallurgy ; X-ray diffraction topography</subject><ispartof>Materials chemistry and physics, 2011-09, Vol.129 (1), p.631-640</ispartof><rights>2011 Elsevier B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c419t-2f8ad56b60004c6a9725e4411569ee044336904a17b2d6f9fa90cbf0fe81cb693</citedby><cites>FETCH-LOGICAL-c419t-2f8ad56b60004c6a9725e4411569ee044336904a17b2d6f9fa90cbf0fe81cb693</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0254058411004123$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Kondoh, Katsuyoshi</creatorcontrib><creatorcontrib>Fujita, Junji</creatorcontrib><creatorcontrib>Umeda, Junko</creatorcontrib><creatorcontrib>Imai, Hisashi</creatorcontrib><creatorcontrib>Enami, Keitaro</creatorcontrib><creatorcontrib>Ohara, Masaki</creatorcontrib><creatorcontrib>Igarashi, Takanori</creatorcontrib><title>Thermo-dynamic analysis on solid-state reduction of CaO particles dispersed in Mg–Al alloy</title><title>Materials chemistry and physics</title><description>► We clarified formation mechanism of Al
2Ca compounds via solid-state reaction between CaO and Mg–Al alloy by calculating standard free energy.
AZ61B alloy powder composite with Al
2Ca fine dispersoids was developed by using CaO additive particles as raw materials. For synthesis of Al
2Ca in the matrix, CaO particles were elementally and uniformly mixed with AZ61B alloy chips via ECABMA process. The mechanism in formation of Al
2Ca intermetallics was investigated by XRD and SEM–EDS analysis when AZ61B alloy green compacts containing CaO additives were heat treated at 380–625
°C in argon gas atmosphere. A change in a standard free energy in formation of Al
2Ca via reaction between CaO and Mg–Al alloy was calculated by using a standard Gibbs free energy of each element contained in the green compact. Both of the theoretical analysis by thermo-dynamic and experimental investigation clarified that Al
2Ca and MgO were synthesized by employing Mg–Al alloy, not pure Mg as the matrix material. Microstructural analysis indicated that needle-like intermetallic of (Mg,Al)
2Ca or Al
3Ca
4Mg were formed as intermediately created compounds in the solid-state reaction between CaO particles and Mg–Al alloy to synthesize Al
2Ca and MgO dispersoids.</description><subject>Additives</subject><subject>Alloying elements</subject><subject>Compacts</subject><subject>Dispersions</subject><subject>Heat treatment</subject><subject>Intermetallic compounds</subject><subject>Intermetallics</subject><subject>Magnesium base alloys</subject><subject>Microstructure</subject><subject>Particulate composites</subject><subject>Powder metallurgy</subject><subject>X-ray diffraction topography</subject><issn>0254-0584</issn><issn>1879-3312</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqNkMFq3DAURUVoIdO0_6CuurLzZMsaazkMSVpIyWa6KwiN9JzRIFuOnifgXf6hf9gvicNk0WVXDy7nXniHsa8CSgFCXR_L3k7ugP14mKmsQIgSmhLE-oKtRLvWRV2L6gNbQdXIAppWXrJPREdYCCHqFfu9O2DuU-HnwfbBcTvYOFMgngZOKQZf0GQn5Bn9yU1hSVPHt_aBjzZPwUUk7gONmAk9DwP_-fj35c8mchtjmj-zj52NhF_e7xX7dXuz234v7h_ufmw394WTQk9F1bXWN2qvAEA6ZfW6alBKIRqlEUHKulYapBXrfeVVpzurwe076LAVbq90fcW-nXfHnJ5OSJPpAzmM0Q6YTmRarSpoW90spD6TLieijJ0Zc-htno0A8ybUHM0_Qs2bUAONWXQt3e25i8srzwGzIRdwcOhDRjcZn8J_rLwCZWqGoQ</recordid><startdate>20110915</startdate><enddate>20110915</enddate><creator>Kondoh, Katsuyoshi</creator><creator>Fujita, Junji</creator><creator>Umeda, Junko</creator><creator>Imai, Hisashi</creator><creator>Enami, Keitaro</creator><creator>Ohara, Masaki</creator><creator>Igarashi, Takanori</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QF</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20110915</creationdate><title>Thermo-dynamic analysis on solid-state reduction of CaO particles dispersed in Mg–Al alloy</title><author>Kondoh, Katsuyoshi ; Fujita, Junji ; Umeda, Junko ; Imai, Hisashi ; Enami, Keitaro ; Ohara, Masaki ; Igarashi, Takanori</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c419t-2f8ad56b60004c6a9725e4411569ee044336904a17b2d6f9fa90cbf0fe81cb693</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Additives</topic><topic>Alloying elements</topic><topic>Compacts</topic><topic>Dispersions</topic><topic>Heat treatment</topic><topic>Intermetallic compounds</topic><topic>Intermetallics</topic><topic>Magnesium base alloys</topic><topic>Microstructure</topic><topic>Particulate composites</topic><topic>Powder metallurgy</topic><topic>X-ray diffraction topography</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kondoh, Katsuyoshi</creatorcontrib><creatorcontrib>Fujita, Junji</creatorcontrib><creatorcontrib>Umeda, Junko</creatorcontrib><creatorcontrib>Imai, Hisashi</creatorcontrib><creatorcontrib>Enami, Keitaro</creatorcontrib><creatorcontrib>Ohara, Masaki</creatorcontrib><creatorcontrib>Igarashi, Takanori</creatorcontrib><collection>CrossRef</collection><collection>Aluminium Industry Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Materials chemistry and physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kondoh, Katsuyoshi</au><au>Fujita, Junji</au><au>Umeda, Junko</au><au>Imai, Hisashi</au><au>Enami, Keitaro</au><au>Ohara, Masaki</au><au>Igarashi, Takanori</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Thermo-dynamic analysis on solid-state reduction of CaO particles dispersed in Mg–Al alloy</atitle><jtitle>Materials chemistry and physics</jtitle><date>2011-09-15</date><risdate>2011</risdate><volume>129</volume><issue>1</issue><spage>631</spage><epage>640</epage><pages>631-640</pages><issn>0254-0584</issn><eissn>1879-3312</eissn><abstract>► We clarified formation mechanism of Al
2Ca compounds via solid-state reaction between CaO and Mg–Al alloy by calculating standard free energy.
AZ61B alloy powder composite with Al
2Ca fine dispersoids was developed by using CaO additive particles as raw materials. For synthesis of Al
2Ca in the matrix, CaO particles were elementally and uniformly mixed with AZ61B alloy chips via ECABMA process. The mechanism in formation of Al
2Ca intermetallics was investigated by XRD and SEM–EDS analysis when AZ61B alloy green compacts containing CaO additives were heat treated at 380–625
°C in argon gas atmosphere. A change in a standard free energy in formation of Al
2Ca via reaction between CaO and Mg–Al alloy was calculated by using a standard Gibbs free energy of each element contained in the green compact. Both of the theoretical analysis by thermo-dynamic and experimental investigation clarified that Al
2Ca and MgO were synthesized by employing Mg–Al alloy, not pure Mg as the matrix material. Microstructural analysis indicated that needle-like intermetallic of (Mg,Al)
2Ca or Al
3Ca
4Mg were formed as intermediately created compounds in the solid-state reaction between CaO particles and Mg–Al alloy to synthesize Al
2Ca and MgO dispersoids.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.matchemphys.2011.05.017</doi><tpages>10</tpages></addata></record> |
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| ispartof | Materials chemistry and physics, 2011-09, Vol.129 (1), p.631-640 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Additives Alloying elements Compacts Dispersions Heat treatment Intermetallic compounds Intermetallics Magnesium base alloys Microstructure Particulate composites Powder metallurgy X-ray diffraction topography |
| title | Thermo-dynamic analysis on solid-state reduction of CaO particles dispersed in Mg–Al alloy |
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