Decomposition induced by mechanical milling

The decomposition behavior of FeSn, CoSn, CoIn/sub 2/ and Al/sub 3/Ni intermetallics under high-energy ball-milling has been investigated using X-ray diffraction, calorimetric and magnetization measurements. Upon milling a large amount of the FeSn inter metallic decomposes into Fe/sub 5/Sn/sub 3/ an...

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Hauptverfasser: Kwon, Y.S., Choi, P.P., Kim, J.S., Gerasimov, K.B.
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Choi, P.P.
Kim, J.S.
Gerasimov, K.B.
description The decomposition behavior of FeSn, CoSn, CoIn/sub 2/ and Al/sub 3/Ni intermetallics under high-energy ball-milling has been investigated using X-ray diffraction, calorimetric and magnetization measurements. Upon milling a large amount of the FeSn inter metallic decomposes into Fe/sub 5/Sn/sub 3/ and FeSn/sub 2/, where the average grain size of the product phases stays nearly constant with milling-time. Similar observations are made for the CoSn intermetallic, which decomposes into Co/sub 3/Sn/sub 2/ and Sn. It is suggested that the mechanically driven decomposition of FeSn and CoSn results from local melting of powder particles due to high temperature pulses during ball collisions. In contrast to FeSn and CoSn, Al/sub 3/Ni exhibits only a small decomposition degree and CoIn/sub 2/ does not decompose at all upon milling. The different decomposition behaviors of the studied intermetallics may be attributed to the volume changes occurring with a decomposition process. Whereas the decomposition of FeSn and CoSn into their product phases results in a strongly negative volume change, the decomposition of Al/sub 3/Ni and CoIn/sub 2/ leads to an increase in volume. Hence, high local stresses under ball collisions are expected to make the mechanically induced decomposition of FeSn and CoSn favorable but rather hinder the decomposition of CoIn/sub 2/ and Al/sub 3/Ni.
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Upon milling a large amount of the FeSn inter metallic decomposes into Fe/sub 5/Sn/sub 3/ and FeSn/sub 2/, where the average grain size of the product phases stays nearly constant with milling-time. Similar observations are made for the CoSn intermetallic, which decomposes into Co/sub 3/Sn/sub 2/ and Sn. It is suggested that the mechanically driven decomposition of FeSn and CoSn results from local melting of powder particles due to high temperature pulses during ball collisions. In contrast to FeSn and CoSn, Al/sub 3/Ni exhibits only a small decomposition degree and CoIn/sub 2/ does not decompose at all upon milling. The different decomposition behaviors of the studied intermetallics may be attributed to the volume changes occurring with a decomposition process. Whereas the decomposition of FeSn and CoSn into their product phases results in a strongly negative volume change, the decomposition of Al/sub 3/Ni and CoIn/sub 2/ leads to an increase in volume. Hence, high local stresses under ball collisions are expected to make the mechanically induced decomposition of FeSn and CoSn favorable but rather hinder the decomposition of CoIn/sub 2/ and Al/sub 3/Ni.</description><identifier>ISBN: 9780780389434</identifier><identifier>ISBN: 0780389433</identifier><identifier>DOI: 10.1109/KORUS.2005.1507782</identifier><language>eng</language><publisher>IEEE</publisher><subject>Grain size ; Intermetallic ; Iron ; Magnetization ; Milling ; Powders ; Stress ; Temperature ; Tin ; X-ray diffraction</subject><ispartof>Proceedings. The 9th Russian-Korean International Symposium on Science and Technology, 2005. 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The different decomposition behaviors of the studied intermetallics may be attributed to the volume changes occurring with a decomposition process. Whereas the decomposition of FeSn and CoSn into their product phases results in a strongly negative volume change, the decomposition of Al/sub 3/Ni and CoIn/sub 2/ leads to an increase in volume. Hence, high local stresses under ball collisions are expected to make the mechanically induced decomposition of FeSn and CoSn favorable but rather hinder the decomposition of CoIn/sub 2/ and Al/sub 3/Ni.</description><subject>Grain size</subject><subject>Intermetallic</subject><subject>Iron</subject><subject>Magnetization</subject><subject>Milling</subject><subject>Powders</subject><subject>Stress</subject><subject>Temperature</subject><subject>Tin</subject><subject>X-ray diffraction</subject><isbn>9780780389434</isbn><isbn>0780389433</isbn><fulltext>true</fulltext><rsrctype>conference_proceeding</rsrctype><creationdate>2005</creationdate><recordtype>conference_proceeding</recordtype><sourceid>6IE</sourceid><sourceid>RIE</sourceid><recordid>eNotj0tLAzEUhQMiKHX-gG5mLzPm3tw0yVKqVmmh0Me65KmReZROXfTfd8AeDny7w3cYewReA3Dzslitd5saOZc1SK6UxhtWGKX5WKENCbpjxTD88jHCTFHTPXt-i75vD_2QT7nvytyFPx9D6c5lG_2P7bK3Tdnmpsnd9wO7TbYZYnHlhO0-3rezz2q5mn_NXpdVBiVPlTHaBZ-4dug091YKwkQewDggLywgUlJ2FMCpCEBSgpY2GYVBkExeTNjT_26OMe4Px9za43l_vSQuQYRAhA</recordid><startdate>2005</startdate><enddate>2005</enddate><creator>Kwon, Y.S.</creator><creator>Choi, P.P.</creator><creator>Kim, J.S.</creator><creator>Gerasimov, K.B.</creator><general>IEEE</general><scope>6IE</scope><scope>6IL</scope><scope>CBEJK</scope><scope>RIE</scope><scope>RIL</scope></search><sort><creationdate>2005</creationdate><title>Decomposition induced by mechanical milling</title><author>Kwon, Y.S. ; Choi, P.P. ; Kim, J.S. ; Gerasimov, K.B.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i175t-998bdcf08b2b80ca5342f4c119b14c3a1224f7a962263d1455185af972d345fc3</frbrgroupid><rsrctype>conference_proceedings</rsrctype><prefilter>conference_proceedings</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Grain size</topic><topic>Intermetallic</topic><topic>Iron</topic><topic>Magnetization</topic><topic>Milling</topic><topic>Powders</topic><topic>Stress</topic><topic>Temperature</topic><topic>Tin</topic><topic>X-ray diffraction</topic><toplevel>online_resources</toplevel><creatorcontrib>Kwon, Y.S.</creatorcontrib><creatorcontrib>Choi, P.P.</creatorcontrib><creatorcontrib>Kim, J.S.</creatorcontrib><creatorcontrib>Gerasimov, K.B.</creatorcontrib><collection>IEEE Electronic Library (IEL) Conference Proceedings</collection><collection>IEEE Proceedings Order Plan All Online (POP All Online) 1998-present by volume</collection><collection>IEEE Xplore All Conference Proceedings</collection><collection>IEEE Electronic Library (IEL)</collection><collection>IEEE Proceedings Order Plans (POP All) 1998-Present</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Kwon, Y.S.</au><au>Choi, P.P.</au><au>Kim, J.S.</au><au>Gerasimov, K.B.</au><format>book</format><genre>proceeding</genre><ristype>CONF</ristype><atitle>Decomposition induced by mechanical milling</atitle><btitle>Proceedings. The 9th Russian-Korean International Symposium on Science and Technology, 2005. KORUS 2005</btitle><stitle>KORUS</stitle><date>2005</date><risdate>2005</risdate><spage>560</spage><epage>564</epage><pages>560-564</pages><isbn>9780780389434</isbn><isbn>0780389433</isbn><abstract>The decomposition behavior of FeSn, CoSn, CoIn/sub 2/ and Al/sub 3/Ni intermetallics under high-energy ball-milling has been investigated using X-ray diffraction, calorimetric and magnetization measurements. Upon milling a large amount of the FeSn inter metallic decomposes into Fe/sub 5/Sn/sub 3/ and FeSn/sub 2/, where the average grain size of the product phases stays nearly constant with milling-time. Similar observations are made for the CoSn intermetallic, which decomposes into Co/sub 3/Sn/sub 2/ and Sn. It is suggested that the mechanically driven decomposition of FeSn and CoSn results from local melting of powder particles due to high temperature pulses during ball collisions. In contrast to FeSn and CoSn, Al/sub 3/Ni exhibits only a small decomposition degree and CoIn/sub 2/ does not decompose at all upon milling. The different decomposition behaviors of the studied intermetallics may be attributed to the volume changes occurring with a decomposition process. Whereas the decomposition of FeSn and CoSn into their product phases results in a strongly negative volume change, the decomposition of Al/sub 3/Ni and CoIn/sub 2/ leads to an increase in volume. Hence, high local stresses under ball collisions are expected to make the mechanically induced decomposition of FeSn and CoSn favorable but rather hinder the decomposition of CoIn/sub 2/ and Al/sub 3/Ni.</abstract><pub>IEEE</pub><doi>10.1109/KORUS.2005.1507782</doi><tpages>5</tpages></addata></record>
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subjects Grain size
Intermetallic
Iron
Magnetization
Milling
Powders
Stress
Temperature
Tin
X-ray diffraction
title Decomposition induced by mechanical milling
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