A novel rapid route for in situ synthesizing TiB-TiB2 composites

Fu Chi Wang; Zhao hui Zhang; Jie Luo; Cheng Cheng Huang; Shu Kui Lee

doi:10.1016/j.compscitech.2009.08.010

A novel rapid route for in situ synthesizing TiB-TiB₂ composites

Fu Chi Wang, Zhao hui Zhang^*, Jie Luo, Cheng Cheng Huang, Shu Kui Lee

^*Corresponding author for this work

School of Material Science and Engineering

Beijing Institute of Technology

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

49 Citations (Scopus)

Abstract

The in situ synthesized TiB-TiB₂ ceramic-matrix composite is prepared by spark plasma sintering using Ti and TiB₂ powders. The microstructures, mechanical properties and the sintering mechanism of the composites are investigated. The composite sintered at 1700 °C has a relative density of 99.4%, average Vickers hardness of 26.5 GPa, flexural strength of 661 MPa and fracture toughness of 6.95 MPa m^1/2. According to the microstructure evolution of the composites, the description of the sintering process can be divided into four stages: activation and melt of the metal powder, reaction of Ti with TiB₂, coarsening of TiB, and rapid densification. Only if the above mentioned sintering stages proceed in turn and are all fully completed, the high quality composite can be obtained.

Original language	English
Pages (from-to)	2682-2687
Number of pages	6
Journal	Composites Science and Technology
Volume	69
Issue number	15-16
DOIs	https://doi.org/10.1016/j.compscitech.2009.08.010
Publication status	Published - Dec 2009

Keywords

A. Ceramic-matrix composites
B. Mechanical properties
D. Fractography
E. Sintering
Microstructure evolution

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10.1016/j.compscitech.2009.08.010

Cite this

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title = "A novel rapid route for in situ synthesizing TiB-TiB2 composites",

abstract = "The in situ synthesized TiB-TiB2 ceramic-matrix composite is prepared by spark plasma sintering using Ti and TiB2 powders. The microstructures, mechanical properties and the sintering mechanism of the composites are investigated. The composite sintered at 1700 °C has a relative density of 99.4%, average Vickers hardness of 26.5 GPa, flexural strength of 661 MPa and fracture toughness of 6.95 MPa m1/2. According to the microstructure evolution of the composites, the description of the sintering process can be divided into four stages: activation and melt of the metal powder, reaction of Ti with TiB2, coarsening of TiB, and rapid densification. Only if the above mentioned sintering stages proceed in turn and are all fully completed, the high quality composite can be obtained.",

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T1 - A novel rapid route for in situ synthesizing TiB-TiB2 composites

AU - Wang, Fu Chi

AU - Zhang, Zhao hui

AU - Luo, Jie

AU - Huang, Cheng Cheng

AU - Lee, Shu Kui

PY - 2009/12

Y1 - 2009/12

N2 - The in situ synthesized TiB-TiB2 ceramic-matrix composite is prepared by spark plasma sintering using Ti and TiB2 powders. The microstructures, mechanical properties and the sintering mechanism of the composites are investigated. The composite sintered at 1700 °C has a relative density of 99.4%, average Vickers hardness of 26.5 GPa, flexural strength of 661 MPa and fracture toughness of 6.95 MPa m1/2. According to the microstructure evolution of the composites, the description of the sintering process can be divided into four stages: activation and melt of the metal powder, reaction of Ti with TiB2, coarsening of TiB, and rapid densification. Only if the above mentioned sintering stages proceed in turn and are all fully completed, the high quality composite can be obtained.

AB - The in situ synthesized TiB-TiB2 ceramic-matrix composite is prepared by spark plasma sintering using Ti and TiB2 powders. The microstructures, mechanical properties and the sintering mechanism of the composites are investigated. The composite sintered at 1700 °C has a relative density of 99.4%, average Vickers hardness of 26.5 GPa, flexural strength of 661 MPa and fracture toughness of 6.95 MPa m1/2. According to the microstructure evolution of the composites, the description of the sintering process can be divided into four stages: activation and melt of the metal powder, reaction of Ti with TiB2, coarsening of TiB, and rapid densification. Only if the above mentioned sintering stages proceed in turn and are all fully completed, the high quality composite can be obtained.

KW - A. Ceramic-matrix composites

KW - B. Mechanical properties

KW - D. Fractography

KW - E. Sintering

KW - Microstructure evolution

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JO - Composites Science and Technology

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IS - 15-16

ER -

A novel rapid route for in situ synthesizing TiB-TiB₂ composites

Abstract

Keywords

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