连续SiC纤维和SiCf/SiC复合材料的研究进展
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袁钦, 宋永才
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Research and Development of Continuous SiC Fibers and SiCf/SiC Composities
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Qin YUAN, Yong-Cai SONG
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| 表1 三代SiC纤维的组成、结构、性能和价格[7-13] |
| Table 1 Details of composition, structure, properties, and cost of three generations SiC based fibers[7-13] |
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| Generation | First | Second | Third | | Trade mark | Nicalon | Tyranno LOX-M | Hi-Nicalon | UF | Hi-Nicalon S | Tyranno SA3 | Sylramic | UF-HM | Cross-linking
method | Oxygen | Oxygen | Electron irradiation | non | Electron irradiation | Oxygen | Oxygen | non | Production
Temperature/℃ | 1200 | 1200 | 1300 | 1400 | >1500 | >1700 | >1700 | >1700 | Element
Compostion/wt% | 56Si+
32C+
12O | 54Si+
32C+
12O+2Ti | 63Si+
37C+
0.5O | 60Si+
39C+
1O | 69Si+
31C+
0.2O | 68Si+
32C+
0.6Al | 67Si+29C+
0.8O+
3.2B+0.4N
+2.1Ti | 67Si+
31C+
2B | | Crystal state | Amorphous | Microcrystalline | Polycrystalline | | Crystalline size/nm | 2-3 | 2-3 | 5-10 | ≤5 | 20 | >60 | 40~60 | >50 | | Fiber diameter/μm | 14 | 11 | 12 | 10-15 | 12 | 7.5 | 10 | 10-15 | | Density/(g·cm-3) | 2.55 | 2.48 | 2.74 | 2.70 | 3.05 | 3.10 | 3.05 | 3.10 | | Tensile strength at RT/GPa | 3.0 | 3.3 | 2.8 | 2.8-3.5 | 2.6 | 2.9 | 3.0 | 2.1-3.5 | | Young’s modulus at RT/GPa | 200 | 185 | 270 | N/A | 400 | 375 | 400 | N/A | Thermal conductivity
/(W·mK) | 3 | 1.5 | 8 | N/A | 18 | 65 | 40 | N/A | Cost
(US$/kg) | 2000 | 1250 | 8000 | N/A | 13000 | 5000 | 10000 | N/A |
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