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Low-temperature sintered (Ti, Zr, Nb, Ta, Mo)C-based composites toughened with damage-free SiCw by Yang Liu; Wei-Ming Guo; Liang Xu; Shi-Kuan Sun; Hua-Tay Lin is a Materials Science article available to read on EtoBox.

What is Low-temperature sintered (Ti, Zr, Nb, Ta, Mo)C-based composites toughened with damage-free SiCw about?

The high sintering temperature would have a great tendency to damage the morphology and thus properties of the silicon carbide whisker (SiC w ) in high entropy carbide-silicon carbide whisker (HEC-SiC w ) composites, which, in turn, would impact the effectiveness of the operative toughening mechanisms. The objective of this study was to achieve full contributions to the toughening effects of SiC w by preparing (Ti, Zr, Nb, Ta, Mo)C-SiC w composites at low temperature (1600 °C) using cobalt as additives. Results showed that the fracture toughness of the (Ti, Zr, Nb, Ta, Mo)C bulk reinforced with 20 vol% SiC w and 5 vol% Co was 7.2 MPa•m 1/2 , which was much higher than that of the (Ti, Zr, Nb, Ta, Mo)C bulk only sintered with 5 vol% Co (3.4 MPa•m 1/2 ). Meanwhile, it was also higher than that of the reported HEC-20 vol% SiC w composite sintered at 2000 °C (4.3 MPa•m 1/2 ). For the fracture toughness of HEC-SiC w composites, it was significantly increased by the introduction of damage-free SiC w .

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Author

Yang Liu; Wei-Ming Guo; Liang Xu; Shi-Kuan Sun; Hua-Tay Lin

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Materials Science (Physical Sciences)