Preparation and growth mechanism of TaCx whiskers

Yong Jun Chen*, Jian Bao Li, Qiang Min Wei, Hua Zhang Zhai

*Corresponding author for this work

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Abstract

Tantalum carbide (TaCx) whiskers were successfully synthesized via different methods and different starting raw materials in the presence of Ni powder used for the catalysis of the synthesis. In the Ta2O5-NaCl-C-Ni and Ta2O5-NaF-C-C12H22O11 (sucrose) systems the whiskers grew via a vapor-liquid-solid (VLS) mechanism and exhibit a fairly straight fiber morphology. In the Ta2O5-KCl-C-Ni system, some whiskers grew via a VLS mechanism and others via a LS mechanism. Some whiskers grew with a zigzag shape tip and conical shaped morphology. All whiskers were grown under similar reaction conditions at temperatures which range from 1150°C to 1350°C in a nitrogen ambient atmosphere. The compositions, morphology, crystal structure and growth mechanism were investigated in detail.

Original languageEnglish
Pages (from-to)244-250
Number of pages7
JournalJournal of Crystal Growth
Volume224
Issue number3-4
DOIs
Publication statusPublished - Apr 2001
Externally publishedYes

Keywords

  • A1. Crystal morphology
  • A1. Growth models
  • A1. X-ray diffraction
  • B1. Tantalum compounds

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Chen, Y. J., Li, J. B., Wei, Q. M., & Zhai, H. Z. (2001). Preparation and growth mechanism of TaCx whiskers. Journal of Crystal Growth, 224(3-4), 244-250. https://doi.org/10.1016/S0022-0248(01)00673-X