Microstructure evolution and phase transformation of TiB2/SiC/B4C composites synthesized from Ti-SiC-B4C ternary system

Chao Wu; Shihui Xie; Yunkai Li

doi:10.1111/ijac.12740

Microstructure evolution and phase transformation of TiB₂/SiC/B₄C composites synthesized from Ti-SiC-B₄C ternary system

Chao Wu, Shihui Xie, Yunkai Li^*

^*Corresponding author for this work

School of Material Science and Engineering

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

10 Citations (Scopus)

Abstract

Bulk TiB₂/SiC/B₄C composites have been synthesized from Ti-SiC-B₄C ternary system with different Ti weight percentages via reactive hot pressing at 1800°C under an applied pressure of 30 MPa for 1.5 h. By Ti amount increasing, the flexural strength curve exhibited an “M-like” tendency reaching the maximum value of 512.36 MPa for 30 wt.% Ti. Microstructural evolution of the composites from conterminously large matrix grains to finely clear-edged particles was observed by scanning electron microscopy. The phase transformation and element diffusion were analyzed by XRD and Energy Disperse Spectroscopy. A hybrid reinforcing mechanism of fracture and crack deflection is proposed to illustrate the change in flexural strength.

Original language	English
Pages (from-to)	1055-1061
Number of pages	7
Journal	International Journal of Applied Ceramic Technology
Volume	14
Issue number	6
DOIs	https://doi.org/10.1111/ijac.12740
Publication status	Published - 1 Nov 2017

Keywords

boron carbide
ceramic-metal systems
hot pressing
phase transformation

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10.1111/ijac.12740

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title = "Microstructure evolution and phase transformation of TiB2/SiC/B4C composites synthesized from Ti-SiC-B4C ternary system",

abstract = "Bulk TiB2/SiC/B4C composites have been synthesized from Ti-SiC-B4C ternary system with different Ti weight percentages via reactive hot pressing at 1800°C under an applied pressure of 30 MPa for 1.5 h. By Ti amount increasing, the flexural strength curve exhibited an “M-like” tendency reaching the maximum value of 512.36 MPa for 30 wt.% Ti. Microstructural evolution of the composites from conterminously large matrix grains to finely clear-edged particles was observed by scanning electron microscopy. The phase transformation and element diffusion were analyzed by XRD and Energy Disperse Spectroscopy. A hybrid reinforcing mechanism of fracture and crack deflection is proposed to illustrate the change in flexural strength.",

keywords = "boron carbide, ceramic-metal systems, hot pressing, phase transformation",

author = "Chao Wu and Shihui Xie and Yunkai Li",

note = "Publisher Copyright: {\textcopyright} 2017 The American Ceramic Society",

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AU - Wu, Chao

AU - Xie, Shihui

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N2 - Bulk TiB2/SiC/B4C composites have been synthesized from Ti-SiC-B4C ternary system with different Ti weight percentages via reactive hot pressing at 1800°C under an applied pressure of 30 MPa for 1.5 h. By Ti amount increasing, the flexural strength curve exhibited an “M-like” tendency reaching the maximum value of 512.36 MPa for 30 wt.% Ti. Microstructural evolution of the composites from conterminously large matrix grains to finely clear-edged particles was observed by scanning electron microscopy. The phase transformation and element diffusion were analyzed by XRD and Energy Disperse Spectroscopy. A hybrid reinforcing mechanism of fracture and crack deflection is proposed to illustrate the change in flexural strength.

AB - Bulk TiB2/SiC/B4C composites have been synthesized from Ti-SiC-B4C ternary system with different Ti weight percentages via reactive hot pressing at 1800°C under an applied pressure of 30 MPa for 1.5 h. By Ti amount increasing, the flexural strength curve exhibited an “M-like” tendency reaching the maximum value of 512.36 MPa for 30 wt.% Ti. Microstructural evolution of the composites from conterminously large matrix grains to finely clear-edged particles was observed by scanning electron microscopy. The phase transformation and element diffusion were analyzed by XRD and Energy Disperse Spectroscopy. A hybrid reinforcing mechanism of fracture and crack deflection is proposed to illustrate the change in flexural strength.

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KW - ceramic-metal systems

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Microstructure evolution and phase transformation of TiB₂/SiC/B₄C composites synthesized from Ti-SiC-B₄C ternary system

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Keywords

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