Elevated temperature mechanical properties of partially sintered alumina
The influence of porosity on the mechanical response of alumina prepared by the partial sintering of micron-sized powders has been evaluated at room temperature and 1100 °C using 4-point flexure and compression creep tests. An approximate fivefold increase in both flexure strength and modulus was ob...
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| Veröffentlicht in: | Composites science and technology 2004-08, Vol.64 (10), p.1551-1563 |
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| container_title | Composites science and technology |
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| creator | Hammond, Vincent H. Elzey, Dana M. |
| description | The influence of porosity on the mechanical response of alumina prepared by the partial sintering of micron-sized powders has been evaluated at room temperature and 1100 °C using 4-point flexure and compression creep tests. An approximate fivefold increase in both flexure strength and modulus was observed with an increase in sample density from 55% to 70%. The significant reductions in steady-state creep rates measured for a constant applied stress was also quantified as a function of increasing density. Electron microscopy showed a rapid increase in the degree of interparticle contact and bonding following limited densification. The increases in flexure strength and modulus were well described by currently available analytical relationships. Compression creep rates could be predicted by a model developed for the densification of porous materials through diffusional creep. |
| doi_str_mv | 10.1016/j.compscitech.2003.11.013 |
| format | Article |
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An approximate fivefold increase in both flexure strength and modulus was observed with an increase in sample density from 55% to 70%. The significant reductions in steady-state creep rates measured for a constant applied stress was also quantified as a function of increasing density. Electron microscopy showed a rapid increase in the degree of interparticle contact and bonding following limited densification. The increases in flexure strength and modulus were well described by currently available analytical relationships. Compression creep rates could be predicted by a model developed for the densification of porous materials through diffusional creep.</description><identifier>ISSN: 0266-3538</identifier><identifier>EISSN: 1879-1050</identifier><identifier>DOI: 10.1016/j.compscitech.2003.11.013</identifier><identifier>CODEN: CSTCEH</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>A. Ceramic matrix composites ; A. Oxides ; Applied sciences ; B. 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Mechanical properties</subject><subject>Composites</subject><subject>Exact sciences and technology</subject><subject>Forms of application and semi-finished materials</subject><subject>Laminates</subject><subject>Polymer industry, paints, wood</subject><subject>Technology of polymers</subject><issn>0266-3538</issn><issn>1879-1050</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><recordid>eNqNkE1LAzEQhoMoWKv_YT3obdd8bHaTo5RqhYIXPYdpdhZT9sskLfTfm9KCHj3NMLzzvjMPIfeMFoyy6mlb2LGfgnUR7VfBKRUFYwVl4oLMmKp1zqikl2RGeVXlQgp1TW5C2FJKa6n5jKyWHe4hYpNF7Cf0EHcesz6ZweAsdNnkxzSODkM2ttkEqYWuO2TBDRF92oNu17sBbslVC13Au3Odk8-X5cdila_fX98Wz-vcCkVjXglON7LkoGq7EZtGQ4W6rMtNJSVnUEpV12VTSka1bXSVGqWapkYhQahWgJiTx5NvOux7hyGa3gWLXQcDjrtguOKi5rRKQn0SWj-G4LE1k3c9-INh1BzZma35w84c2RnGTGKXdh_OIRAShNbDYF34NZBKKK2PGYuTDtPHe4feJDccLDbOo42mGd0_0n4A24OLTQ</recordid><startdate>20040801</startdate><enddate>20040801</enddate><creator>Hammond, Vincent H.</creator><creator>Elzey, Dana M.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20040801</creationdate><title>Elevated temperature mechanical properties of partially sintered alumina</title><author>Hammond, Vincent H. ; Elzey, Dana M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c380t-6320b542a87cb3bd9a6e9474b65521a458774d45109cd9645188dd7e35a38f3a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>A. Ceramic matrix composites</topic><topic>A. Oxides</topic><topic>Applied sciences</topic><topic>B. Creep</topic><topic>B. 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| source | Elsevier ScienceDirect Journals |
| subjects | A. Ceramic matrix composites A. Oxides Applied sciences B. Creep B. Mechanical properties Composites Exact sciences and technology Forms of application and semi-finished materials Laminates Polymer industry, paints, wood Technology of polymers |
| title | Elevated temperature mechanical properties of partially sintered alumina |
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