Preparation of micro-coiled TiC fibers by metal impurity-activated chemical vapor deposition

✍ Scribed by S. Motojima; H. Iwanaga

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 319 KB
• Volume: 34
• Category: Article
• ISSN: 0921-5107
• DOI: 10.1016/0921-5107(95)01310-5

✦ Synopsis

Micro-coiled TiC fibers have been directly prepared on a graphite substrate from TiC14 + H 2 + PCI 3 gas mixtures at 1050 °C by the Si + Pd mixed impurity-activated CVD process. It was found that the presence of small amounts of PCI 3 in the source gas as well as Si + Pd mixed impurities were indispensable for the deposition of the micro-coiled TiC fibers. The obtained coiled TiC fibers were in a polycrystalline state with a 1-5 ~tm coil diameter and 20-150 ~tm coil length. The TiC coils were generally double coils similar to DNA.