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Tantalum carbide ceramics containing at least 75‐wt% ζ‐Ta4C3−x were synthesized and densified to ∼99% of the theoretical density. Flexural strength in four‐point bending was measured from room temperature up to 1600°C, achieving strengths of 710 ± 36.5 MPa at room temperature and decreasing to 180 ± 19.7 MPa at 1600°C. Fracture toughness was measured via the chevron notch method from room temperature...
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