Macroporous silicon nitride (Si3N4) ceramics with high strength, uniform structure and relatively high porosity were obtained by gelcasting and carbonthermal reaction in a two-step sintering technique. Microstructure and composition were investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction(XRD). Open porosity, pore size distribution and basic mechanical performance were measured by Archimedes method,mercury intrusion porosimetry and three-point bending methods, respectively. SEM and TEM results revealed that pores were formed by elongated β-Si3N4. SADP measurement proved the formation of SiC particles. The SiC granules were beneficial for the formation of high ratio elongated β-Si3N4, and at proper amount, they also acted as reinforcement phase. Thermodynamic analysis indicated that the mechanisms of the reactions were mainly associated with liquid-solid reaction and gas-liquid reaction.
参考文献
| [1] | D M Liu .[J].Ceramics International,1998,24(06):441. |
| [2] | T Yokota;Y Takahata;T Katsuyama;Y Matsuda .[J].Catalysis Today,2001,69(1-4):11. |
| [3] | E S Connally .[J].Fuel and Energy Abstracts,1997,38(04):257. |
| [4] | A Sugimoto .[J].Biotechnology Advances,1997,15(01):311. |
| [5] | I.C. Cosentino;E.N.S. Muccillo;R. Muccillo .Development of zirconia-titania porous ceramics for humidity sensors[J].Sensors and Actuators, B. Chemical,2003(3):677-683. |
| [6] | A Julbe;D Farrusseng;C Guizard .[J].Journal of Membrane Science,2001,181(01):3. |
| [7] | J F Yang;Z Y Deng;T Ohji .[J].Journal of the European Ceramic Society,2003,23(02):371. |
| [8] | B.A.A.L. van Setten;R. van Dijk;S.J. Jelles;M. Makkee;J.A. Moulijn .The potential of supported molten salts in the removal of soot from diesel exhaust gas[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,1999(1):51-61. |
| [9] | Y M Jo .[J].Fuel and Energy Abstracts,1997,38(03):181. |
| [10] | R Gilissen;J P Erauw;A Smolders;E Vanswijgenhoven,J Luyten .[J].Materials & Design,2000,21(04):251. |
| [11] | H T Wang;X Q Liu;H Zheng;W J Zheng,G Y Meng .[J].Ceramics International,1999,25(02):177. |
| [12] | O O Omatete;M A Janney;S D Nunn .[J].Journal of the European Ceramic Society,1997,17(2-3):407. |
| [13] | L J Zhou;Y Huang;Z P Xie;Y B Cheng .[J].Materials Letters,2000,45(01):51. |
| [14] | J F Yang;G J Zhang;T Ohji .[J].Journal of the American Ceramic Society,2001,84(07):1639. |
| [15] | J F Yang;G J Zhang;N Kondo;T Ohji .[J].Acta Materialia,2002,50(19):4831. |
| [16] | R H Plovnick;D J Pysher .[J].Materials Research Bulletin,2000,35(09):1453. |
| [17] | J F Yang;G J Zhang;N Kondo;J H She,Z H Jin,T Ohji,S Kanzaki .[J].Journal of the American Ceramic Society,2003,86(06):910. |
| [18] | H D Batha;E D Whithey .[J].Journal of the American Ceramic Society,1993,56(09):365. |
| [19] | W Hincke;L R Brantly .[J].Journal of the American Chemical Society,1930,52(01):48. |
| [20] | Y Inagaki;N Kondo;T Ohji .[J].Journal of the European Ceramic Society,2002,22(14-15):2489. |
| [21] | A Yoshio .[J].Journal of the Ceramic Society of Japan,1992,100(04):463. |
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