Effects of Carbon Sources on Structure and Properties of TaC Ceramic Powder Prepared by Polymer Derived Ceramics
Source abstract
Abstract
Polymer derived ceramic is one of the effective methods for producing ultra-high temperature ceramics and powders, but effect of source material type on precursor cross-linking degree and ceramic yield has rarely been reported.Here, TaC precursors were synthesized using two carbon sources and poly-tantalumoxane (PTO).Phase composition and microstructure of TaC ceramic powders from different carbon sources, tantalum/carbon mass ratios, and pyrolysis temperatures were characterized.It was found that PF-3 resin with C=C was effective in promoting the cross-linking of PTO and increasing the ceramic yield.When the mass ratio of PTO to PF-3 Resin was 1 : 0.25 and PTO to 2402 Resin was 1 : 0.4, TaC ceramic powders could be obtained at 1400 ℃ without residue Ta 2 O 5 .Ceramic yields of ceramic powders were 54.02% and 49.64%, and the crystal sizes were 47.2 and 60.9 nm, respectively.Therefore, PF-3 resin is able to reduce crystal size while increasing ceramic yield, but has less impact on the powder
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Research context
OpenAlex topics: Advanced materials and composites · Advanced ceramic materials synthesis · Microwave Dielectric Ceramics Synthesis
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References (40)
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