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Si 0.5-1h,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B-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.
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 multilay-ered structure consisting of alternate SiC and Si layers. The load-displacement curve of laminated Si/SiC ce-ramic composites shows a non-catastrophic fracture behavior, which is attributed to the muhilayered morpholo-gy and the toughening of bar -shaped SiC grains.
参考文献
| [1] | Cordt Zollfrank;Heino Sieber .Microstructure Evolution and Reaction Mechanism of Biomorphous SiSiC Ceramics[J].Journal of the American Ceramic Society,2005(1):51-58. |
| [2] | Daniela Almeida Streitwieser;Nadja Popovska;Helmut Gerhard .Optimization of the ceramization process for the production of three-dimensional biomorphic porous SiC ceramics by chemical vapor infiltration (CVI)[J].Journal of the European Ceramic Society,2006(12):2381-2387. |
| [3] | Guangya Hou;Zhihao Jin;Junmin Qian .Effect of holding time on the basic properties of biomorphic SiC ceramic derived from beech wood[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1/2):278-283. |
| [4] | Qiao GJ.;Ma R.;Cai N.;Zhang CG.;Jin ZH. .Mechanical properties and microstructure of Si/SiC materials derived from native wood[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1/2):301-305. |
| [5] | J.-M. Qian;Z.-H. Jin .Preparation and characterization of porous, biomorphic SiC ceramic with hybrid pore structure[J].Journal of the European Ceramic Society,2006(8):1311-1316. |
| [6] | 吴文涛,孙世群.甘蔗渣制备木质陶瓷及其性能表征[J].合肥工业大学学报(自然科学版),2001(06):1133-1136. |
| [7] | HUI-MING CHENG;HIROYUKI ENDO;TOSHIHIRO OKABE .Graphitization Behavior of Wood Ceramics and Bamboo Ceramics as Determined by X-Ray Diffraction[J].Journal of porous materials,1999(3):233-237. |
| [8] | Andrew K.Kercher;Dennis C.Nagle .Microstructural evolution during charcoal carbonization by X-ray diffraction analysis[J].Carbon: An International Journal Sponsored by the American Carbon Society,2003(1):15-27. |
| [9] | Yang GB;Liu YJ;Qiao GJ;Yang JF;Wang HJ .Preparation and R-curve properties of laminated Si/SiC ceramics from paper[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):327-332. |
| [10] | 武安华,葛昌纯.原位增韧β-Si3N4/α-Sialon复相陶瓷[J].北京科技大学学报,2002(06):627-629. |
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