Gas pressure sintering of β-silicon nitride
The sintering behaviour of beta-Si3N4 powder was investigated in 980 kPa (10 atm) nitrogen at 1800-2000 C. It is shown that beta-Si3N4 has a higher sinterability than the finer alpha-Si3N4. The solution of small grains and reprecipitation on large grains occurred during sintering at greater than 160...
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| Veröffentlicht in: | Journal of materials science 1991-07, Vol.26 (14), p.3940-3944 |
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| container_title | Journal of materials science |
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| creator | MITOMO, M UENOSONO, S |
| description | The sintering behaviour of beta-Si3N4 powder was investigated in 980 kPa (10 atm) nitrogen at 1800-2000 C. It is shown that beta-Si3N4 has a higher sinterability than the finer alpha-Si3N4. The solution of small grains and reprecipitation on large grains occurred during sintering at greater than 1600 C. The rate determining step in the liquid-phase sintering is believed to be the diffusion of material through the liquid phase at grain boundaries. There was no abnormal grain growth during gas pressure sintering of beta-Si3N4. The microstructures of gas pressure sintered materials from beta-Si3N4 were more uniform that those from alpha-Si3N4. The densification mechanism of beta-Si3N4 is discussed in relation to that of alpha-Si3N4. 22 refs. |
| doi_str_mv | 10.1007/BF01184995 |
| format | Article |
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It is shown that beta-Si3N4 has a higher sinterability than the finer alpha-Si3N4. The solution of small grains and reprecipitation on large grains occurred during sintering at greater than 1600 C. The rate determining step in the liquid-phase sintering is believed to be the diffusion of material through the liquid phase at grain boundaries. There was no abnormal grain growth during gas pressure sintering of beta-Si3N4. The microstructures of gas pressure sintered materials from beta-Si3N4 were more uniform that those from alpha-Si3N4. The densification mechanism of beta-Si3N4 is discussed in relation to that of alpha-Si3N4. 22 refs.</description><subject>Applied sciences</subject><subject>Building materials. Ceramics. 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Glasses</topic><topic>Ceramic industries</topic><topic>Chemical industry and chemicals</topic><topic>Exact sciences and technology</topic><topic>Structural ceramics</topic><topic>Technical ceramics</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>MITOMO, M</creatorcontrib><creatorcontrib>UENOSONO, S</creatorcontrib><collection>Pascal-Francis</collection><collection>Ceramic Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Engineered Materials Abstracts</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of materials science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>MITOMO, M</au><au>UENOSONO, S</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Gas pressure sintering of β-silicon nitride</atitle><jtitle>Journal of materials science</jtitle><date>1991-07-15</date><risdate>1991</risdate><volume>26</volume><issue>14</issue><spage>3940</spage><epage>3944</epage><pages>3940-3944</pages><issn>0022-2461</issn><eissn>1573-4803</eissn><coden>JMTSAS</coden><abstract>The sintering behaviour of beta-Si3N4 powder was investigated in 980 kPa (10 atm) nitrogen at 1800-2000 C. It is shown that beta-Si3N4 has a higher sinterability than the finer alpha-Si3N4. The solution of small grains and reprecipitation on large grains occurred during sintering at greater than 1600 C. The rate determining step in the liquid-phase sintering is believed to be the diffusion of material through the liquid phase at grain boundaries. There was no abnormal grain growth during gas pressure sintering of beta-Si3N4. The microstructures of gas pressure sintered materials from beta-Si3N4 were more uniform that those from alpha-Si3N4. The densification mechanism of beta-Si3N4 is discussed in relation to that of alpha-Si3N4. 22 refs.</abstract><cop>Heidelberg</cop><pub>Springer</pub><doi>10.1007/BF01184995</doi><tpages>5</tpages></addata></record> |
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| language | eng |
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| subjects | Applied sciences Building materials. Ceramics. Glasses Ceramic industries Chemical industry and chemicals Exact sciences and technology Structural ceramics Technical ceramics |
| title | Gas pressure sintering of β-silicon nitride |
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