Preparation and growth mechanism of TaCx whiskers

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

doi:10.1016/S0022-0248(01)00673-X

Preparation and growth mechanism of TaC_x whiskers

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

^*Corresponding author for this work

Tsinghua University

Research output: Contribution to journal › Article › peer-review

56 Citations (Scopus)

Abstract

Tantalum carbide (TaC_x) 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 language	English
Pages (from-to)	244-250
Number of pages	7
Journal	Journal of Crystal Growth
Volume	224
Issue number	3-4
DOIs	https://doi.org/10.1016/S0022-0248(01)00673-X
Publication status	Published - Apr 2001
Externally published	Yes

Keywords

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

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10.1016/S0022-0248(01)00673-X

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title = "Preparation and growth mechanism of TaCx whiskers",

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.",

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AU - Li, Jian Bao

AU - Wei, Qiang Min

AU - Zhai, Hua Zhang

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KW - A1. Growth models

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KW - B1. Tantalum compounds

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Preparation and growth mechanism of TaC_x whiskers

Abstract

Keywords

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