ISSN:
1551-2916
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Reaction thermodynamics was utilized to analyze the selective carbonization conditions of ZrO2-TiO2-Y2O3 ultrafine powder and to define the temperature range of the selective carbonization. The ZrO2-TiO2-Y2O3 powder was prepared by coprecipitation from a solution containing Zr4+, Ti4+, and Y3+. The powder was selectively carbonized at 1350°, 1450°, 1550°, and 1650°C, respectively, for 2 h under argon atmosphere with sucrose as the carbon source. The resulting product was analyzed by X-ray diffraction. The experimental results indicated that the ZrO2-TiO2-Y2O3 powder could be selectively carbonized in situ at 1450°C to form a carbonized powder which was composed of TiC and t-ZrO2. It was also found that zirconium carbide could be formed at 1550°C, which is much lower than the carbonization temperature of ZrO2 defined by thermodynamics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1151-2916.1999.tb01970.x
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