Title

Synthesis, microstructural characterization, and mechanical property evaluation of vacuum plasma sprayed tantalum carbide

Authors

Authors

K. Balani; G. Gonzalez; A. Agarwal; R. Hickman; J. S. O'Dell;S. Seal

Comments

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Abbreviated Journal Title

J. Am. Ceram. Soc.

Keywords

SOLIDIFICATION; TOUGHNESS; CERAMICS; ALLOYS; Materials Science, Ceramics

Abstract

Tantalum carbide (TaC) is an ultra-high-temperature ceramic for potential applications as protective coating, furnace components, propulsion liners for space shuttles and aircrafts, etc. Microstructural and mechanical behavior of vacuum plasma-sprayed (VPS) TaC has been investigated in the present study. Apart from major TaC phase, microstructural definitions elucidated Ta2C, non-stoichiometric TaCx phases (0.83 <= x <= 0.94), partial grain formation, polygonization of grains, and inhomogeneous C/Ta ratios in the sprayed structure. Near-isotropy in the fracture-toughness ratio (K-axial/K-trans=1.01) is attributed to compact coating, fine-closed porosity, and distribution of non-stoichiometric phases.

Journal Title

Journal of the American Ceramic Society

Volume

89

Issue/Number

4

Publication Date

1-1-2006

Document Type

Article

Language

English

First Page

1419

Last Page

1425

WOS Identifier

WOS:000236175200037

ISSN

0002-7820

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