期刊
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
卷 24, 期 6, 页码 1779-1784出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1003-6326(14)63253-2
关键词
ZrC precursor; pyrolysis mechanism; precursor infiltration and pyrolysis; C/C-ZrC composites
资金
- National Basic Research Program of China [2011CB605801]
- Graduated Students' Scientific Research Innovation Project in Hunan Province of China [CX2012B042]
C/C-ZrC composites were prepared by precursor infiltration and pyrolysis using the organic zirconium as precursor. The conversion mechanisms of the precursors such as the thermal behavior, structural evolution, phase composition, microstructure, composition of the precursors and products were analyzed by thermal gravimetric analyzer, Fourier transform infrared spectrometer, X-ray diffraction and scanning electron microscope. The results indicate that the ZrC precursor transforms to inorganic ZrO2 from room temperature to 1200 degrees C, then reduces to ZrC at 1600 degrees C through the carbothermal reduction reaction. The microstructure of the C/C-ZrC composites was also investigated. The composites exhibit an interesting structure, a coating composed of ZrC ceramic covers the exterior of the composite, and the ZrC ceramic is embedded in the pores of the matrix inside the composite.
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