Formation, characterization, and properties of radiopaque TaC–C/C and ZrO2–C/C composites
TaC-carbon/carbon composites and ZrO2-carbon/carbon composites were prepared by liquid-phase infiltration. Microstructure, phase, flexural strength, and radiopacity were examined using a scanning electron microscope, an X-ray diffractometer, an electronic universal testing machine, and a dental X-ray unit. Results showed that ZrO2 and TaC phases were formed in carbon/carbon composites during heat treatment because of decomposition and the reaction between Ta2O5 and C. The surface micrograph showed that TaC and ZrO2 particles were embedded in the carbon matrix. TaC-carbon/carbon composites and ZrO2-carbon/carbon composites displayed pseudoductile fracture behavior. Radiopaque properties of TaC-carbon/carbon composites and ZrO2-carbon/carbon composites increased with increased concentration of ethylate tantalum and zirconium acetate solutions. At 15 wt% concentration of these solutions, carbon/carbon composites were visible in biomedical X-ray.
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Document Type: Research Article
Publication date: December 1, 2015
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