| 引用本文: | 杨刚宾,刘银娟,乔冠军,王红洁.碳模板转化法制备管状SiC/Si复合陶瓷[J].材料科学与工艺,2010,18(1):124-128.DOI:10.11951/j.issn.1005-0299.20100127. |
| YANG Gang-bin,LIU Yin-juan,QIAO Guan-jun,WANG Hong-jie.Fabrication of tubular SiC/Si ceramic composites by carbon template conversion[J].Materials Science and Technology,2010,18(1):124-128.DOI:10.11951/j.issn.1005-0299.20100127. |
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| 摘要: |
| 利用纸作为原材料,通过卷曲、树脂浸渍、碳化预制备出具有层状结构的管状碳模板,之后在1550℃通过原位反应液相渗Si0.5-1h,在常压烧结条件下制备出具有层状结构特征的SiC/Si管状陶瓷复合材料.采用XRD、SEM对碳模板反应前后的物相变化和显微结构进行了研究.结果表明了该材料的最终产物为β-SiC和Si,且两者分布表现出明显的交替成层现象,呈现出层状陶瓷的结构特征. |
| 关键词: 碳化 复合陶瓷 层状结构 |
| DOI：10.11951/j.issn.1005-0299.20100127 |
| 分类号:TQ174.1 |
| 基金项目:国家自然科学基金资助项目(50572084) |
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| Fabrication of tubular SiC/Si ceramic composites by carbon template conversion |
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YANG Gang-bin1,2, LIU Yin-juan1, QIAO Guan-jun1, WANG Hong-jie1
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1.State Key laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,China;2.Dept. of Environmental Chemistry,Luoyang Institute of Technology and Science,Luoyang 471023,China
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| Abstract: |
| SiC/Si tubular ceramic composites were synthesized successfully using paper as raw material. By rolling the paper to tubular shape,marinating it with phenolic resin and carbonizing it at 800 ℃ for 2 h,we fabricated tubular carbon templates. And then laminated SiC/Si ceramic composites were prepared by in-situ reaction with molten silicon at the temperature up to 1550 ℃ in Ar atmosphere for 1-2 h. XRD analysis shows that the final product is composed of beta-SiC and free silicon. SEM exhibits a distinguished multilayered structure consisting of alternate SiC and Si layers. The load-displacement curve of laminated Si/SiC ceramic composites shows a non-catastrophic fracture behavior,which is attributed to the multilayered morphology and the toughening of bar-shaped SiC grains. |
| Key words: carbonization ceramic composites multilayered microstructure |
