Metastable phase formation in the Au-Si system via ultrafast nanocalorimetry
We have investigated the stability and solidification of nanometer size Au-Si droplets using an ultrafast heating/cooling nanocalorimetry and in situ growth techniques. The liquid can be supercooled to very low temperatures for both Au-rich (ΔT∼95K) and Si-rich (ΔT∼220K) samples. Solidification of a...
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| Veröffentlicht in: | Journal of applied physics 2012-05, Vol.111 (9), p.093516-093516-7 |
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| creator | Zhang, M. Wen, J. G. Efremov, M. Y. Olson, E. A. Zhang, Z. S. Hu, L. de la Rama, L. P. Kummamuru, R. Kavanagh, K. L. Ma, Z. Allen, L. H. |
| description | We have investigated the stability and solidification of nanometer size Au-Si droplets using an ultrafast heating/cooling nanocalorimetry and
in situ
growth techniques. The liquid can be supercooled to very low temperatures for both Au-rich (ΔT∼95K) and Si-rich (ΔT∼220K) samples. Solidification of a unique metastable phase δ
1
is observed with a composition of 74±4 at. % Au and a
b
-centered orthorhombic structure (
a
=0.92,
b
=0.72, and
c
=1.35nm; body-center in the
a-c
plane), which grows heteroepitaxially to Au
s
. Its melting temperature T
m
is 305±5°C. There is competition during formation between the eutectic and δ
1
phases but δ
1
is the only metastable alloy observed. For small size droplets, both the δ
1
and eutectic phases show considerable depression of the melting point (size-dependent melting). |
| doi_str_mv | 10.1063/1.4712342 |
| format | Article |
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in situ
growth techniques. The liquid can be supercooled to very low temperatures for both Au-rich (ΔT∼95K) and Si-rich (ΔT∼220K) samples. Solidification of a unique metastable phase δ
1
is observed with a composition of 74±4 at. % Au and a
b
-centered orthorhombic structure (
a
=0.92,
b
=0.72, and
c
=1.35nm; body-center in the
a-c
plane), which grows heteroepitaxially to Au
s
. Its melting temperature T
m
is 305±5°C. There is competition during formation between the eutectic and δ
1
phases but δ
1
is the only metastable alloy observed. For small size droplets, both the δ
1
and eutectic phases show considerable depression of the melting point (size-dependent melting).</description><identifier>ISSN: 0021-8979</identifier><identifier>EISSN: 1089-7550</identifier><identifier>DOI: 10.1063/1.4712342</identifier><identifier>CODEN: JAPIAU</identifier><language>eng</language><publisher>American Institute of Physics</publisher><subject>Droplets ; Eutectic temperature ; Gold ; Melting ; Metastable phases ; Nanomaterials ; Nanostructure ; Phases</subject><ispartof>Journal of applied physics, 2012-05, Vol.111 (9), p.093516-093516-7</ispartof><rights>2012 American Institute of Physics</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c383t-9590417ecfc0477597747fed0f4580ee054fb009aa4003bcb4850ca6aea87d403</citedby><cites>FETCH-LOGICAL-c383t-9590417ecfc0477597747fed0f4580ee054fb009aa4003bcb4850ca6aea87d403</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://pubs.aip.org/jap/article-lookup/doi/10.1063/1.4712342$$EHTML$$P50$$Gscitation$$H</linktohtml><link.rule.ids>314,776,780,790,1553,4498,27901,27902,76126,76132</link.rule.ids></links><search><creatorcontrib>Zhang, M.</creatorcontrib><creatorcontrib>Wen, J. G.</creatorcontrib><creatorcontrib>Efremov, M. Y.</creatorcontrib><creatorcontrib>Olson, E. A.</creatorcontrib><creatorcontrib>Zhang, Z. S.</creatorcontrib><creatorcontrib>Hu, L.</creatorcontrib><creatorcontrib>de la Rama, L. P.</creatorcontrib><creatorcontrib>Kummamuru, R.</creatorcontrib><creatorcontrib>Kavanagh, K. L.</creatorcontrib><creatorcontrib>Ma, Z.</creatorcontrib><creatorcontrib>Allen, L. H.</creatorcontrib><title>Metastable phase formation in the Au-Si system via ultrafast nanocalorimetry</title><title>Journal of applied physics</title><description>We have investigated the stability and solidification of nanometer size Au-Si droplets using an ultrafast heating/cooling nanocalorimetry and
in situ
growth techniques. The liquid can be supercooled to very low temperatures for both Au-rich (ΔT∼95K) and Si-rich (ΔT∼220K) samples. Solidification of a unique metastable phase δ
1
is observed with a composition of 74±4 at. % Au and a
b
-centered orthorhombic structure (
a
=0.92,
b
=0.72, and
c
=1.35nm; body-center in the
a-c
plane), which grows heteroepitaxially to Au
s
. Its melting temperature T
m
is 305±5°C. There is competition during formation between the eutectic and δ
1
phases but δ
1
is the only metastable alloy observed. For small size droplets, both the δ
1
and eutectic phases show considerable depression of the melting point (size-dependent melting).</description><subject>Droplets</subject><subject>Eutectic temperature</subject><subject>Gold</subject><subject>Melting</subject><subject>Metastable phases</subject><subject>Nanomaterials</subject><subject>Nanostructure</subject><subject>Phases</subject><issn>0021-8979</issn><issn>1089-7550</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNp10E1LAzEQgOEgCtbqwX-Qox62TjbZZnMRSvELKh7Uc5hNJ3RlP2qSFfrvXW3Bk6e5vDMMD2OXAmYC5vJGzJQWuVT5EZsIKE2miwKO2QQgF1lptDllZzF-AAhRSjNhq2dKGBNWDfHtBiNx34cWU913vO542hBfDNlrzeMuJmr5V418aFJAP27xDrveYdOHuqUUdufsxGMT6eIwp-z9_u5t-ZitXh6elotV5mQpU2YKA0poct6B0rowWivtaQ1eFSUQQaF8BWAQFYCsXKXKAhzOkbDUawVyyq72d7eh_xwoJtvW0VHTYEf9EK2QucwFaC3G9HqfutDHGMjb7fgshp0VYH_ErLAHsbG93bfR1emX4P_4j83-stmRTX4DcPRyzQ</recordid><startdate>20120501</startdate><enddate>20120501</enddate><creator>Zhang, M.</creator><creator>Wen, J. G.</creator><creator>Efremov, M. Y.</creator><creator>Olson, E. A.</creator><creator>Zhang, Z. S.</creator><creator>Hu, L.</creator><creator>de la Rama, L. P.</creator><creator>Kummamuru, R.</creator><creator>Kavanagh, K. L.</creator><creator>Ma, Z.</creator><creator>Allen, L. H.</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20120501</creationdate><title>Metastable phase formation in the Au-Si system via ultrafast nanocalorimetry</title><author>Zhang, M. ; Wen, J. G. ; Efremov, M. Y. ; Olson, E. A. ; Zhang, Z. S. ; Hu, L. ; de la Rama, L. P. ; Kummamuru, R. ; Kavanagh, K. L. ; Ma, Z. ; Allen, L. H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c383t-9590417ecfc0477597747fed0f4580ee054fb009aa4003bcb4850ca6aea87d403</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Droplets</topic><topic>Eutectic temperature</topic><topic>Gold</topic><topic>Melting</topic><topic>Metastable phases</topic><topic>Nanomaterials</topic><topic>Nanostructure</topic><topic>Phases</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zhang, M.</creatorcontrib><creatorcontrib>Wen, J. G.</creatorcontrib><creatorcontrib>Efremov, M. Y.</creatorcontrib><creatorcontrib>Olson, E. A.</creatorcontrib><creatorcontrib>Zhang, Z. S.</creatorcontrib><creatorcontrib>Hu, L.</creatorcontrib><creatorcontrib>de la Rama, L. P.</creatorcontrib><creatorcontrib>Kummamuru, R.</creatorcontrib><creatorcontrib>Kavanagh, K. L.</creatorcontrib><creatorcontrib>Ma, Z.</creatorcontrib><creatorcontrib>Allen, L. H.</creatorcontrib><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of applied physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zhang, M.</au><au>Wen, J. G.</au><au>Efremov, M. Y.</au><au>Olson, E. A.</au><au>Zhang, Z. S.</au><au>Hu, L.</au><au>de la Rama, L. P.</au><au>Kummamuru, R.</au><au>Kavanagh, K. L.</au><au>Ma, Z.</au><au>Allen, L. H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Metastable phase formation in the Au-Si system via ultrafast nanocalorimetry</atitle><jtitle>Journal of applied physics</jtitle><date>2012-05-01</date><risdate>2012</risdate><volume>111</volume><issue>9</issue><spage>093516</spage><epage>093516-7</epage><pages>093516-093516-7</pages><issn>0021-8979</issn><eissn>1089-7550</eissn><coden>JAPIAU</coden><abstract>We have investigated the stability and solidification of nanometer size Au-Si droplets using an ultrafast heating/cooling nanocalorimetry and
in situ
growth techniques. The liquid can be supercooled to very low temperatures for both Au-rich (ΔT∼95K) and Si-rich (ΔT∼220K) samples. Solidification of a unique metastable phase δ
1
is observed with a composition of 74±4 at. % Au and a
b
-centered orthorhombic structure (
a
=0.92,
b
=0.72, and
c
=1.35nm; body-center in the
a-c
plane), which grows heteroepitaxially to Au
s
. Its melting temperature T
m
is 305±5°C. There is competition during formation between the eutectic and δ
1
phases but δ
1
is the only metastable alloy observed. For small size droplets, both the δ
1
and eutectic phases show considerable depression of the melting point (size-dependent melting).</abstract><pub>American Institute of Physics</pub><doi>10.1063/1.4712342</doi></addata></record> |
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| ispartof | Journal of applied physics, 2012-05, Vol.111 (9), p.093516-093516-7 |
| issn | 0021-8979 1089-7550 |
| language | eng |
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| source | AIP Journals Complete; AIP Digital Archive; Alma/SFX Local Collection |
| subjects | Droplets Eutectic temperature Gold Melting Metastable phases Nanomaterials Nanostructure Phases |
| title | Metastable phase formation in the Au-Si system via ultrafast nanocalorimetry |
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