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Synthesis, Microstructural Characterization, and Mechanical Property Evaluation of Vacuum Plasma Sprayed Tantalum Carbide
Author(s) -
Balani Kantesh,
Gonzalez Gabriela,
Agarwal Arvind,
Hickman Robert,
O'Dell J. Scott,
Seal Sudipta
Publication year - 2006
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00899.x
Subject(s) - materials science , tantalum , tantalum carbide , porosity , coating , ceramic , stoichiometry , boron carbide , carbide , fracture toughness , microstructure , composite material , metallurgy , isotropy , chemistry , physics , organic chemistry , quantum mechanics
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 Ta 2 C, non‐stoichiometric TaC x 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.