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Title: Synthesis and Characterization of TiC Nanofibers Obtained via a Modified Carbothermal Process

Journal Article · · Crystal Research and Technology
 [1]; ORCiD logo [2]
  1. Owens Corning Science &, Technology Granville OH 43023 USA
  2. Department of Mechanical Engineering and Energy Processes Southern Illinois University Carbondale IL 62901 USA

Abstract A simple method for synthesis of titanium carbide (TiC) nanofibers by a modified carbothermal reduction of electrospun titanium‐based fibers is reported. The effect of synthesis steps on the final product is discussed. Continuous TiC fibers synthesized have a smooth surface morphology, with average diameter of 148 nm and length in the centimeter range. X‐ray diffraction and high‐resolution transmission electron microscopy analysis results indicate that the fibers consist of TiC of high purity. Impact of heat treatment on the morphology and chemical and crystalline composition of the product is also investigated. Based on the experimental evidence, it is hypothesized that the carbothermal reduction of calcined electrospun fibers with precoated carbon proceeds through diffusion‐limited shrinking core pathway while that of the as‐spun fibers follows the reaction‐limited solution precipitation mechanism. The TiC nanofibers also show superior sintering properties by increasing theoretical density of hot pressed TiB 2 from 94.5% of theoretical density to 97.9% of theoretical density. When sintered with ceria, it improves the conductivity of the ceria by 18.29 times as compared to 2.94 times by TiC nanoparticles at 800 °C. The TiC nanofibers show metallic behavior as well as potential for application as electrochemical double layer capacitor supercapacitors.

Sponsoring Organization:
USDOE
OSTI ID:
1787065
Journal Information:
Crystal Research and Technology, Journal Name: Crystal Research and Technology Vol. 56 Journal Issue: 8; ISSN 0232-1300
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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