Fabrication and flexural strength of porous Si3N4 ceramics with Li2CO3 and Y2O3 as sintering additives
By employing sintering additives of Li 2 CO 3 and Y 2 O 3 , porous Si 3 N ceramics are prepared after experiencing the processes of sintering and post-vacuum heat treatment at 1680 and 1550 °C, respectively. The experimental results demonstrate the completed phase transformation from α to β -Si 3 N...
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| Veröffentlicht in: | Journal of Central South University 2020-09, Vol.27 (9), p.2548-2556 |
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| container_title | Journal of Central South University |
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| creator | Hu, Hai-long Luo, Shi-bin |
| description | By employing sintering additives of Li
2
CO
3
and Y
2
O
3
, porous Si
3
N ceramics are prepared after experiencing the processes of sintering and post-vacuum heat treatment at 1680 and 1550 °C, respectively. The experimental results demonstrate the completed phase transformation from
α
to
β
-Si
3
N
4
in Si
3
N
4
ceramic samples with a amount of 1.60 wt% Li
2
CO
3
(0.65 wt% Li
2
O) and 0.33 wt% Y
2
O
3
additives. The as-synthesized porous Si3N4 ceramics exhibit high flexural strength ((126.7±2.7) MPa) and high open porosity of 50.4% at elevated temperature (1200 °C). These results are attributed to the significant role of added Li
2
CO
3
as sintering additive, where the volatilization of intergranular glassy phase occurs during sintering process. Therefore, porous Si
3
N
4
ceramics with desired mechanical property prepared by altering the addition of sintering additives demonstrate their great potential as a promising candidate for high temperature applications. |
| doi_str_mv | 10.1007/s11771-020-4480-1 |
| format | Article |
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2
CO
3
and Y
2
O
3
, porous Si
3
N ceramics are prepared after experiencing the processes of sintering and post-vacuum heat treatment at 1680 and 1550 °C, respectively. The experimental results demonstrate the completed phase transformation from
α
to
β
-Si
3
N
4
in Si
3
N
4
ceramic samples with a amount of 1.60 wt% Li
2
CO
3
(0.65 wt% Li
2
O) and 0.33 wt% Y
2
O
3
additives. The as-synthesized porous Si3N4 ceramics exhibit high flexural strength ((126.7±2.7) MPa) and high open porosity of 50.4% at elevated temperature (1200 °C). These results are attributed to the significant role of added Li
2
CO
3
as sintering additive, where the volatilization of intergranular glassy phase occurs during sintering process. Therefore, porous Si
3
N
4
ceramics with desired mechanical property prepared by altering the addition of sintering additives demonstrate their great potential as a promising candidate for high temperature applications.</description><identifier>ISSN: 2095-2899</identifier><identifier>EISSN: 2227-5223</identifier><identifier>DOI: 10.1007/s11771-020-4480-1</identifier><language>eng</language><publisher>Changsha: Central South University</publisher><subject>Additives ; Ceramics ; Engineering ; Flexural strength ; Heat treatment ; High temperature ; Lithium oxides ; Metallic Materials ; Phase transitions ; Porosity ; Silicon nitride ; Sintering ; Sintering (powder metallurgy) ; Yttrium oxide</subject><ispartof>Journal of Central South University, 2020-09, Vol.27 (9), p.2548-2556</ispartof><rights>Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020</rights><rights>Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c2311-370ffba54f9f62b778041f6a7fe8a0cf57b56e155766d732fc2015cf5e7dd9ce3</citedby><cites>FETCH-LOGICAL-c2311-370ffba54f9f62b778041f6a7fe8a0cf57b56e155766d732fc2015cf5e7dd9ce3</cites><orcidid>0000-0003-4107-2644</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11771-020-4480-1$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11771-020-4480-1$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,41488,42557,51319</link.rule.ids></links><search><creatorcontrib>Hu, Hai-long</creatorcontrib><creatorcontrib>Luo, Shi-bin</creatorcontrib><title>Fabrication and flexural strength of porous Si3N4 ceramics with Li2CO3 and Y2O3 as sintering additives</title><title>Journal of Central South University</title><addtitle>J. Cent. South Univ</addtitle><description>By employing sintering additives of Li
2
CO
3
and Y
2
O
3
, porous Si
3
N ceramics are prepared after experiencing the processes of sintering and post-vacuum heat treatment at 1680 and 1550 °C, respectively. The experimental results demonstrate the completed phase transformation from
α
to
β
-Si
3
N
4
in Si
3
N
4
ceramic samples with a amount of 1.60 wt% Li
2
CO
3
(0.65 wt% Li
2
O) and 0.33 wt% Y
2
O
3
additives. The as-synthesized porous Si3N4 ceramics exhibit high flexural strength ((126.7±2.7) MPa) and high open porosity of 50.4% at elevated temperature (1200 °C). These results are attributed to the significant role of added Li
2
CO
3
as sintering additive, where the volatilization of intergranular glassy phase occurs during sintering process. Therefore, porous Si
3
N
4
ceramics with desired mechanical property prepared by altering the addition of sintering additives demonstrate their great potential as a promising candidate for high temperature applications.</description><subject>Additives</subject><subject>Ceramics</subject><subject>Engineering</subject><subject>Flexural strength</subject><subject>Heat treatment</subject><subject>High temperature</subject><subject>Lithium oxides</subject><subject>Metallic Materials</subject><subject>Phase transitions</subject><subject>Porosity</subject><subject>Silicon nitride</subject><subject>Sintering</subject><subject>Sintering (powder metallurgy)</subject><subject>Yttrium oxide</subject><issn>2095-2899</issn><issn>2227-5223</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp1kD9PwzAQxS0EEhX0A7BZYjbY59hORlRRQKroAAxMluPYxahNip3w59vjECQmpnu6e-9O90PojNELRqm6TIwpxQgFSoqipIQdoBkAKCIA-GHWtBIEyqo6RvOUQk05A8llJWfIL00dgzV96Fps2gb7rfscotni1EfXbvoX3Hm872I3JPwQ-H2BrYtmF2zCHyFPVwEWa_4TfYZRJJxC27sY2g02TRP68O7SKTryZpvc_LeeoKfl9ePilqzWN3eLqxWxwBkjXFHvayMKX3kJtVIlLZiXRnlXGmq9ULWQjgmhpGwUB2-BMpH7TjVNZR0_QefT3n3s3gaXev3aDbHNJzUUipcsQ4DsYpPLxi6l6Lzex7Az8UszqkeieiKqM1E9EtUsZ2DKpP34mot_m_8PfQNHP3fT</recordid><startdate>20200901</startdate><enddate>20200901</enddate><creator>Hu, Hai-long</creator><creator>Luo, Shi-bin</creator><general>Central South University</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0003-4107-2644</orcidid></search><sort><creationdate>20200901</creationdate><title>Fabrication and flexural strength of porous Si3N4 ceramics with Li2CO3 and Y2O3 as sintering additives</title><author>Hu, Hai-long ; Luo, Shi-bin</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2311-370ffba54f9f62b778041f6a7fe8a0cf57b56e155766d732fc2015cf5e7dd9ce3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Additives</topic><topic>Ceramics</topic><topic>Engineering</topic><topic>Flexural strength</topic><topic>Heat treatment</topic><topic>High temperature</topic><topic>Lithium oxides</topic><topic>Metallic Materials</topic><topic>Phase transitions</topic><topic>Porosity</topic><topic>Silicon nitride</topic><topic>Sintering</topic><topic>Sintering (powder metallurgy)</topic><topic>Yttrium oxide</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hu, Hai-long</creatorcontrib><creatorcontrib>Luo, Shi-bin</creatorcontrib><collection>CrossRef</collection><jtitle>Journal of Central South University</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hu, Hai-long</au><au>Luo, Shi-bin</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Fabrication and flexural strength of porous Si3N4 ceramics with Li2CO3 and Y2O3 as sintering additives</atitle><jtitle>Journal of Central South University</jtitle><stitle>J. Cent. South Univ</stitle><date>2020-09-01</date><risdate>2020</risdate><volume>27</volume><issue>9</issue><spage>2548</spage><epage>2556</epage><pages>2548-2556</pages><issn>2095-2899</issn><eissn>2227-5223</eissn><abstract>By employing sintering additives of Li
2
CO
3
and Y
2
O
3
, porous Si
3
N ceramics are prepared after experiencing the processes of sintering and post-vacuum heat treatment at 1680 and 1550 °C, respectively. The experimental results demonstrate the completed phase transformation from
α
to
β
-Si
3
N
4
in Si
3
N
4
ceramic samples with a amount of 1.60 wt% Li
2
CO
3
(0.65 wt% Li
2
O) and 0.33 wt% Y
2
O
3
additives. The as-synthesized porous Si3N4 ceramics exhibit high flexural strength ((126.7±2.7) MPa) and high open porosity of 50.4% at elevated temperature (1200 °C). These results are attributed to the significant role of added Li
2
CO
3
as sintering additive, where the volatilization of intergranular glassy phase occurs during sintering process. Therefore, porous Si
3
N
4
ceramics with desired mechanical property prepared by altering the addition of sintering additives demonstrate their great potential as a promising candidate for high temperature applications.</abstract><cop>Changsha</cop><pub>Central South University</pub><doi>10.1007/s11771-020-4480-1</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0003-4107-2644</orcidid></addata></record> |
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| language | eng |
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| source | SpringerLink Journals; Alma/SFX Local Collection |
| subjects | Additives Ceramics Engineering Flexural strength Heat treatment High temperature Lithium oxides Metallic Materials Phase transitions Porosity Silicon nitride Sintering Sintering (powder metallurgy) Yttrium oxide |
| title | Fabrication and flexural strength of porous Si3N4 ceramics with Li2CO3 and Y2O3 as sintering additives |
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