Effect of rare-earth oxides on properties of silicon nitride obtained by normal sintering and sinter-HIP
This paper presented the microstructure, mechanical properties and oxidation behavior of silicon nitride obtained by both conventional sintering and sintering followed by hot isostatic pressing （HIP）. Silicon nitride with additives such as 5 wt.% Al2O3 and 5 wt.% Ln203 （Ln= La, La concentrate, Gd or...
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| Veröffentlicht in: | Journal of rare earths 2012-11, Vol.30 (11), p.1177-1183 |
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| container_title | Journal of rare earths |
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| creator | Guedes-Silva, Cecilia C. de Souza Carvalho, Flávio Machado Bressiani, José Carlos |
| description | This paper presented the microstructure, mechanical properties and oxidation behavior of silicon nitride obtained by both conventional sintering and sintering followed by hot isostatic pressing （HIP）. Silicon nitride with additives such as 5 wt.% Al2O3 and 5 wt.% Ln203 （Ln= La, La concentrate, Gd or La＋Gd） were studied. The results revealed that Gd203 additions increased the formation of elongated grains of β-Si3N4, the fracture toughness and oxidation resistance. La2O3 additions led to higher densification and hardness values, while addition of La2O3 concentrate promoted the formation of materials with intermediate properties, compared to the other studied compositions. Hot isostatic pressing increased the hardness but decreased the fracture toughness of the material, mainly because it allowed residual pores to close and also reduced the average aspect ratio of β-Si3N4 grains. |
| doi_str_mv | 10.1016/S1002-0721(12)60201-4 |
| format | Article |
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Silicon nitride with additives such as 5 wt.% Al2O3 and 5 wt.% Ln203 （Ln= La, La concentrate, Gd or La＋Gd） were studied. The results revealed that Gd203 additions increased the formation of elongated grains of β-Si3N4, the fracture toughness and oxidation resistance. La2O3 additions led to higher densification and hardness values, while addition of La2O3 concentrate promoted the formation of materials with intermediate properties, compared to the other studied compositions. Hot isostatic pressing increased the hardness but decreased the fracture toughness of the material, mainly because it allowed residual pores to close and also reduced the average aspect ratio of β-Si3N4 grains.</description><identifier>ISSN: 1002-0721</identifier><identifier>EISSN: 2509-4963</identifier><identifier>DOI: 10.1016/S1002-0721(12)60201-4</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Fracture toughness ; Hardness ; HIP ; Hot isostatic pressing ; La2O3 ; normal sintering ; Oxidation resistance ; Rare earth compounds ; Rare earth metals ; rare earths ; Silicon nitride ; silicon nitride properties ; sinter-HIP ; Sintering (powder metallurgy) ; 属性 ; 断裂韧性 ; 氮化硅 ; 烧结 ; 热等静压 ; 稀土氧化物</subject><ispartof>Journal of rare earths, 2012-11, Vol.30 (11), p.1177-1183</ispartof><rights>2012 The Chinese Society of Rare Earths</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c368t-cca3400f983508fd0524efda1687f33c24191d227d2d2e66bf246086cef80c4d3</citedby><cites>FETCH-LOGICAL-c368t-cca3400f983508fd0524efda1687f33c24191d227d2d2e66bf246086cef80c4d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/84120X/84120X.jpg</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S1002072112602014$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Guedes-Silva, Cecilia C.</creatorcontrib><creatorcontrib>de Souza Carvalho, Flávio Machado</creatorcontrib><creatorcontrib>Bressiani, José Carlos</creatorcontrib><title>Effect of rare-earth oxides on properties of silicon nitride obtained by normal sintering and sinter-HIP</title><title>Journal of rare earths</title><addtitle>Journal of Rare Earths</addtitle><description>This paper presented the microstructure, mechanical properties and oxidation behavior of silicon nitride obtained by both conventional sintering and sintering followed by hot isostatic pressing （HIP）. Silicon nitride with additives such as 5 wt.% Al2O3 and 5 wt.% Ln203 （Ln= La, La concentrate, Gd or La＋Gd） were studied. The results revealed that Gd203 additions increased the formation of elongated grains of β-Si3N4, the fracture toughness and oxidation resistance. La2O3 additions led to higher densification and hardness values, while addition of La2O3 concentrate promoted the formation of materials with intermediate properties, compared to the other studied compositions. Hot isostatic pressing increased the hardness but decreased the fracture toughness of the material, mainly because it allowed residual pores to close and also reduced the average aspect ratio of β-Si3N4 grains.</description><subject>Fracture toughness</subject><subject>Hardness</subject><subject>HIP</subject><subject>Hot isostatic pressing</subject><subject>La2O3</subject><subject>normal sintering</subject><subject>Oxidation resistance</subject><subject>Rare earth compounds</subject><subject>Rare earth metals</subject><subject>rare earths</subject><subject>Silicon nitride</subject><subject>silicon nitride properties</subject><subject>sinter-HIP</subject><subject>Sintering (powder metallurgy)</subject><subject>属性</subject><subject>断裂韧性</subject><subject>氮化硅</subject><subject>烧结</subject><subject>热等静压</subject><subject>稀土氧化物</subject><issn>1002-0721</issn><issn>2509-4963</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqFkE1PGzEQhq2qSKShPwHJ3Ohh2_HHendPqELQIEUCCXq2HHtMXG3sYC9V-fc4JMq1p9GMnnfGfgg5Z_CdAVM_HhkAb6Dj7JLxbwo4sEZ-IjPewtDIQYnPZHZETsmXUv4AiK4dYEbWN96jnWjyNJuMDZo8rWn6FxwWmiLd5rTFPIVd52kJY7B1GsOUK0HTajIhoqOrNxpT3pixInHCHOIzNdEdumZx93BGTrwZC3491Dn5fXvzdL1olve_7q5_LhsrVD811hohAfzQixZ676DlEr0zTPWdF8JyyQbmOO8cdxyVWnkuFfTKou_BSifm5HK_t7785RXLpDehWBxHEzG9Fs14L5Tqeqkq2u5Rm1MpGb3e5rAx-U0z0Duz-sOs3mmrOf1hVsuau9rnsP7jb8Csiw0YLbqQq0vtUvjvhovD5XWKzy_V1vG0FINiLR_EOzuKi4U</recordid><startdate>20121101</startdate><enddate>20121101</enddate><creator>Guedes-Silva, Cecilia C.</creator><creator>de Souza Carvalho, Flávio Machado</creator><creator>Bressiani, José Carlos</creator><general>Elsevier B.V</general><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>W92</scope><scope>~WA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20121101</creationdate><title>Effect of rare-earth oxides on properties of silicon nitride obtained by normal sintering and sinter-HIP</title><author>Guedes-Silva, Cecilia C. ; de Souza Carvalho, Flávio Machado ; Bressiani, José Carlos</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c368t-cca3400f983508fd0524efda1687f33c24191d227d2d2e66bf246086cef80c4d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Fracture toughness</topic><topic>Hardness</topic><topic>HIP</topic><topic>Hot isostatic pressing</topic><topic>La2O3</topic><topic>normal sintering</topic><topic>Oxidation resistance</topic><topic>Rare earth compounds</topic><topic>Rare earth metals</topic><topic>rare earths</topic><topic>Silicon nitride</topic><topic>silicon nitride properties</topic><topic>sinter-HIP</topic><topic>Sintering (powder metallurgy)</topic><topic>属性</topic><topic>断裂韧性</topic><topic>氮化硅</topic><topic>烧结</topic><topic>热等静压</topic><topic>稀土氧化物</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Guedes-Silva, Cecilia C.</creatorcontrib><creatorcontrib>de Souza Carvalho, Flávio Machado</creatorcontrib><creatorcontrib>Bressiani, José Carlos</creatorcontrib><collection>中文科技期刊数据库</collection><collection>中文科技期刊数据库-CALIS站点</collection><collection>中文科技期刊数据库-7.0平台</collection><collection>中文科技期刊数据库-工程技术</collection><collection>中文科技期刊数据库- 镜像站点</collection><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of rare earths</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Guedes-Silva, Cecilia C.</au><au>de Souza Carvalho, Flávio Machado</au><au>Bressiani, José Carlos</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of rare-earth oxides on properties of silicon nitride obtained by normal sintering and sinter-HIP</atitle><jtitle>Journal of rare earths</jtitle><addtitle>Journal of Rare Earths</addtitle><date>2012-11-01</date><risdate>2012</risdate><volume>30</volume><issue>11</issue><spage>1177</spage><epage>1183</epage><pages>1177-1183</pages><issn>1002-0721</issn><eissn>2509-4963</eissn><abstract>This paper presented the microstructure, mechanical properties and oxidation behavior of silicon nitride obtained by both conventional sintering and sintering followed by hot isostatic pressing （HIP）. Silicon nitride with additives such as 5 wt.% Al2O3 and 5 wt.% Ln203 （Ln= La, La concentrate, Gd or La＋Gd） were studied. The results revealed that Gd203 additions increased the formation of elongated grains of β-Si3N4, the fracture toughness and oxidation resistance. La2O3 additions led to higher densification and hardness values, while addition of La2O3 concentrate promoted the formation of materials with intermediate properties, compared to the other studied compositions. Hot isostatic pressing increased the hardness but decreased the fracture toughness of the material, mainly because it allowed residual pores to close and also reduced the average aspect ratio of β-Si3N4 grains.</abstract><pub>Elsevier B.V</pub><doi>10.1016/S1002-0721(12)60201-4</doi><tpages>7</tpages></addata></record> |
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| ispartof | Journal of rare earths, 2012-11, Vol.30 (11), p.1177-1183 |
| issn | 1002-0721 2509-4963 |
| language | eng |
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| source | Elsevier ScienceDirect Journals; Alma/SFX Local Collection |
| subjects | Fracture toughness Hardness HIP Hot isostatic pressing La2O3 normal sintering Oxidation resistance Rare earth compounds Rare earth metals rare earths Silicon nitride silicon nitride properties sinter-HIP Sintering (powder metallurgy) 属性 断裂韧性 氮化硅 烧结 热等静压 稀土氧化物 |
| title | Effect of rare-earth oxides on properties of silicon nitride obtained by normal sintering and sinter-HIP |
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