Publication Date:
2013-03-20
Description:
The ceramic precursor for HfB 2 / HfC / SiC / C was prepared via solution-based processing of polyhafnoxanesal, linear phenolic resin, boric acid and poly[(methylsilylene)acetylene)]. The obtained precursor could be cured at 250°C and subsequently heat treated at relative lower temperature (1500°C) to form HfB 2 / HfC / SiC / C ceramic powders. The ceramic powders were characterized by element analysis, thermal gravimetric analysis, X-ray diffraction, Raman spectroscopy, and Scanning electron microscopy. The results indicated that the ceramic powders with particle size of 200~500 nm were consisted of pure phase HfB 2 , HfC , and SiC along with free carbon as fourth phase with low crystallinity.
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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