Mechanical behavior of MoSi2 reinforced-Si3N4 matrix composites
The mechanical behavior of MoSi2 reinforced Si3N4 matrix composites was investigated as a function of MoSi2 phase content, MoSi2 phase size, and amount of MgO densification aid for the Si3N4 phase. Coarse-phase MoSi2-Si3N4 composites exhibited higher room temperature fracture toughness than fine-pha...
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| Veröffentlicht in: | Journal of the American Ceramic Society 1997-12, Vol.80 (12), p.3070-3076 |
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| container_end_page | 3076 |
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| container_issue | 12 |
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| container_title | Journal of the American Ceramic Society |
| container_volume | 80 |
| creator | PETROVIC, J. J PENA, M. I REIMANIS, I. E SANDLIN, M. S CONZONE, S. D KUNG, H. H BUTT, D. P |
| description | The mechanical behavior of MoSi2 reinforced Si3N4 matrix composites was investigated as a function of MoSi2 phase content, MoSi2 phase size, and amount of MgO densification aid for the Si3N4 phase. Coarse-phase MoSi2-Si3N4 composites exhibited higher room temperature fracture toughness than fine-phase composites, reaching values greater than 8 MPa sq rt m. Composite fracture toughness levels increased at elevated temperature. Fine-phase composites were stronger and more creep resistant than coarse-phase composites. Room temperature strengths greater than 1000 MPa and impression creep rates of 10 exp -8/s at 1200 C were observed. Increased MgO levels generally were deleterious to MoSi2-Si3N mechanical properties. Internal stresses due to MoSi2 and Si3N4 thermal expansion coefficient mismatch appeared to contribute to fracture toughening in MoSi2-Si3N4 composites. (Author) |
| doi_str_mv | 10.1111/j.1151-2916.1997.tb03234.x |
| format | Article |
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J ; PENA, M. I ; REIMANIS, I. E ; SANDLIN, M. S ; CONZONE, S. D ; KUNG, H. H ; BUTT, D. P</creator><creatorcontrib>PETROVIC, J. J ; PENA, M. I ; REIMANIS, I. E ; SANDLIN, M. S ; CONZONE, S. D ; KUNG, H. H ; BUTT, D. P</creatorcontrib><description>The mechanical behavior of MoSi2 reinforced Si3N4 matrix composites was investigated as a function of MoSi2 phase content, MoSi2 phase size, and amount of MgO densification aid for the Si3N4 phase. Coarse-phase MoSi2-Si3N4 composites exhibited higher room temperature fracture toughness than fine-phase composites, reaching values greater than 8 MPa sq rt m. Composite fracture toughness levels increased at elevated temperature. Fine-phase composites were stronger and more creep resistant than coarse-phase composites. Room temperature strengths greater than 1000 MPa and impression creep rates of 10 exp -8/s at 1200 C were observed. Increased MgO levels generally were deleterious to MoSi2-Si3N mechanical properties. Internal stresses due to MoSi2 and Si3N4 thermal expansion coefficient mismatch appeared to contribute to fracture toughening in MoSi2-Si3N4 composites. (Author)</description><identifier>ISSN: 0002-7820</identifier><identifier>EISSN: 1551-2916</identifier><identifier>DOI: 10.1111/j.1151-2916.1997.tb03234.x</identifier><identifier>CODEN: JACTAW</identifier><language>eng</language><publisher>Malden,MA: Blackwell</publisher><subject>Applied sciences ; Building materials. Ceramics. 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Increased MgO levels generally were deleterious to MoSi2-Si3N mechanical properties. Internal stresses due to MoSi2 and Si3N4 thermal expansion coefficient mismatch appeared to contribute to fracture toughening in MoSi2-Si3N4 composites. (Author)</description><subject>Applied sciences</subject><subject>Building materials. Ceramics. 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Room temperature strengths greater than 1000 MPa and impression creep rates of 10 exp -8/s at 1200 C were observed. Increased MgO levels generally were deleterious to MoSi2-Si3N mechanical properties. Internal stresses due to MoSi2 and Si3N4 thermal expansion coefficient mismatch appeared to contribute to fracture toughening in MoSi2-Si3N4 composites. (Author)</abstract><cop>Malden,MA</cop><pub>Blackwell</pub><doi>10.1111/j.1151-2916.1997.tb03234.x</doi><tpages>7</tpages></addata></record> |
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| ispartof | Journal of the American Ceramic Society, 1997-12, Vol.80 (12), p.3070-3076 |
| issn | 0002-7820 1551-2916 |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Applied sciences Building materials. Ceramics. Glasses Ceramic industries Chemical industry and chemicals Exact sciences and technology Structural ceramics Technical ceramics |
| title | Mechanical behavior of MoSi2 reinforced-Si3N4 matrix composites |
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