Microstructure and mechanical properties of TiB-TiB2 ceramic matrix composites fabricated by spark plasma sintering

Hamza Cheloui; Zhaohui Zhang; Xiangbo Shen; Fuchi Wang; Shukui Lee

doi:10.1016/j.msea.2011.01.096

Microstructure and mechanical properties of TiB-TiB₂ ceramic matrix composites fabricated by spark plasma sintering

Hamza Cheloui, Zhaohui Zhang^*, Xiangbo Shen, Fuchi Wang, Shukui Lee

^*Corresponding author for this work

School of Material Science and Engineering

Beijing Institute of Technology

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

35 Citations (Scopus)

Abstract

TiB-TiB₂ ceramic matrix composites were synthesized by spark plasma sintering (SPS) process using Ti and TiB₂ powders. The microstructure, mechanical properties, and the densification behavior of the in situ synthesized TiB-TiB₂ composites were investigated. The effect of the addition of Ti on the microstructure and the reaction products of the composites were discussed. The results indicated that the composite synthesized from the mixtures containing 5wt.% Ti and 95wt.% TiB₂ at 1650°C had the highest relative density of 99.4% along with flexural strength of 534MPa and fracture toughness of 6.19MPam^1/2. However, when the weight content of Ti in the mixtures exceeded 15%, the mechanical properties of the in situ synthesized TiB-TiB₂ composites decreased due to the extensive formation of the TiB secondary phase at the TiB₂ grain boundaries and the rapid grain growth of the TiB and TiB₂ phases.

Original language	English
Pages (from-to)	3849-3853
Number of pages	5
Journal	Materials Science and Engineering: A
Volume	528
Issue number	10-11
DOIs	https://doi.org/10.1016/j.msea.2011.01.096
Publication status	Published - 25 Apr 2011

Keywords

Ceramic matrix composites
Mechanical properties
Microstructure
Sintering

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10.1016/j.msea.2011.01.096

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title = "Microstructure and mechanical properties of TiB-TiB2 ceramic matrix composites fabricated by spark plasma sintering",

abstract = "TiB-TiB2 ceramic matrix composites were synthesized by spark plasma sintering (SPS) process using Ti and TiB2 powders. The microstructure, mechanical properties, and the densification behavior of the in situ synthesized TiB-TiB2 composites were investigated. The effect of the addition of Ti on the microstructure and the reaction products of the composites were discussed. The results indicated that the composite synthesized from the mixtures containing 5wt.\% Ti and 95wt.\% TiB2 at 1650°C had the highest relative density of 99.4\% along with flexural strength of 534MPa and fracture toughness of 6.19MPam1/2. However, when the weight content of Ti in the mixtures exceeded 15\%, the mechanical properties of the in situ synthesized TiB-TiB2 composites decreased due to the extensive formation of the TiB secondary phase at the TiB2 grain boundaries and the rapid grain growth of the TiB and TiB2 phases.",

keywords = "Ceramic matrix composites, Mechanical properties, Microstructure, Sintering",

author = "Hamza Cheloui and Zhaohui Zhang and Xiangbo Shen and Fuchi Wang and Shukui Lee",

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journal = "Materials Science and Engineering: A",

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T1 - Microstructure and mechanical properties of TiB-TiB2 ceramic matrix composites fabricated by spark plasma sintering

AU - Cheloui, Hamza

AU - Zhang, Zhaohui

AU - Shen, Xiangbo

AU - Wang, Fuchi

AU - Lee, Shukui

PY - 2011/4/25

Y1 - 2011/4/25

N2 - TiB-TiB2 ceramic matrix composites were synthesized by spark plasma sintering (SPS) process using Ti and TiB2 powders. The microstructure, mechanical properties, and the densification behavior of the in situ synthesized TiB-TiB2 composites were investigated. The effect of the addition of Ti on the microstructure and the reaction products of the composites were discussed. The results indicated that the composite synthesized from the mixtures containing 5wt.% Ti and 95wt.% TiB2 at 1650°C had the highest relative density of 99.4% along with flexural strength of 534MPa and fracture toughness of 6.19MPam1/2. However, when the weight content of Ti in the mixtures exceeded 15%, the mechanical properties of the in situ synthesized TiB-TiB2 composites decreased due to the extensive formation of the TiB secondary phase at the TiB2 grain boundaries and the rapid grain growth of the TiB and TiB2 phases.

AB - TiB-TiB2 ceramic matrix composites were synthesized by spark plasma sintering (SPS) process using Ti and TiB2 powders. The microstructure, mechanical properties, and the densification behavior of the in situ synthesized TiB-TiB2 composites were investigated. The effect of the addition of Ti on the microstructure and the reaction products of the composites were discussed. The results indicated that the composite synthesized from the mixtures containing 5wt.% Ti and 95wt.% TiB2 at 1650°C had the highest relative density of 99.4% along with flexural strength of 534MPa and fracture toughness of 6.19MPam1/2. However, when the weight content of Ti in the mixtures exceeded 15%, the mechanical properties of the in situ synthesized TiB-TiB2 composites decreased due to the extensive formation of the TiB secondary phase at the TiB2 grain boundaries and the rapid grain growth of the TiB and TiB2 phases.

KW - Ceramic matrix composites

KW - Mechanical properties

KW - Microstructure

KW - Sintering

UR - https://www.scopus.com/pages/publications/79952282290

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DO - 10.1016/j.msea.2011.01.096

M3 - Article

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SN - 0921-5093

VL - 528

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EP - 3853

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

IS - 10-11

ER -

Microstructure and mechanical properties of TiB-TiB₂ ceramic matrix composites fabricated by spark plasma sintering

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Keywords

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