Microstructural development during spark plasma sintering of ZrB2–SiC–Ti composite

Ehsan Ghasali; Mehdi Shahedi Asl

doi:10.1016/j.ceramint.2018.07.011

Microstructural development during spark plasma sintering of ZrB₂–SiC–Ti composite

Ehsan Ghasali, Mehdi Shahedi Asl^*

^*Corresponding author for this work

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

96 Citations (Scopus)

Abstract

The present study investigates the effect of Ti addition on the microstructure development and phase evolution during spark plasma sintering of ZrB₂–SiC ceramic composite. A ZrB₂–20 vol% SiC sample with 15 wt% Ti was prepared by high-energy milling and spark plasma sintering at 2000 °C for 7 min under 50 MPa. The X-ray diffraction test, microstructural studies and thermodynamic assessments indicated the in-situ formation of several compounds due to the chemical reactions of Ti with ZrB₂ and SiC. The Ti additive was completely consumed during the sintering process and converted to the ceramic compounds of TiC, TiB and TiSi₂. In addition, another refractory phase of ZrC was also formed as a result of sidelong reaction of ZrB₂ and SiC with the Ti additive.

Original language	English
Pages (from-to)	18078-18083
Number of pages	6
Journal	Ceramics International
Volume	44
Issue number	15
DOIs	https://doi.org/10.1016/j.ceramint.2018.07.011
Publication status	Published - 15 Oct 2018
Externally published	Yes

Keywords

In-situ formed compounds
Microstructure
Phase evolution
Spark plasma sintering
Ti addition
ZrB–SiC composite

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10.1016/j.ceramint.2018.07.011

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title = "Microstructural development during spark plasma sintering of ZrB2–SiC–Ti composite",

abstract = "The present study investigates the effect of Ti addition on the microstructure development and phase evolution during spark plasma sintering of ZrB2–SiC ceramic composite. A ZrB2–20 vol% SiC sample with 15 wt% Ti was prepared by high-energy milling and spark plasma sintering at 2000 °C for 7 min under 50 MPa. The X-ray diffraction test, microstructural studies and thermodynamic assessments indicated the in-situ formation of several compounds due to the chemical reactions of Ti with ZrB2 and SiC. The Ti additive was completely consumed during the sintering process and converted to the ceramic compounds of TiC, TiB and TiSi2. In addition, another refractory phase of ZrC was also formed as a result of sidelong reaction of ZrB2 and SiC with the Ti additive.",

keywords = "In-situ formed compounds, Microstructure, Phase evolution, Spark plasma sintering, Ti addition, ZrB–SiC composite",

author = "Ehsan Ghasali and {Shahedi Asl}, Mehdi",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd and Techna Group S.r.l.",

year = "2018",

month = oct,

day = "15",

doi = "10.1016/j.ceramint.2018.07.011",

language = "English",

volume = "44",

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journal = "Ceramics International",

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T1 - Microstructural development during spark plasma sintering of ZrB2–SiC–Ti composite

AU - Ghasali, Ehsan

AU - Shahedi Asl, Mehdi

PY - 2018/10/15

Y1 - 2018/10/15

N2 - The present study investigates the effect of Ti addition on the microstructure development and phase evolution during spark plasma sintering of ZrB2–SiC ceramic composite. A ZrB2–20 vol% SiC sample with 15 wt% Ti was prepared by high-energy milling and spark plasma sintering at 2000 °C for 7 min under 50 MPa. The X-ray diffraction test, microstructural studies and thermodynamic assessments indicated the in-situ formation of several compounds due to the chemical reactions of Ti with ZrB2 and SiC. The Ti additive was completely consumed during the sintering process and converted to the ceramic compounds of TiC, TiB and TiSi2. In addition, another refractory phase of ZrC was also formed as a result of sidelong reaction of ZrB2 and SiC with the Ti additive.

AB - The present study investigates the effect of Ti addition on the microstructure development and phase evolution during spark plasma sintering of ZrB2–SiC ceramic composite. A ZrB2–20 vol% SiC sample with 15 wt% Ti was prepared by high-energy milling and spark plasma sintering at 2000 °C for 7 min under 50 MPa. The X-ray diffraction test, microstructural studies and thermodynamic assessments indicated the in-situ formation of several compounds due to the chemical reactions of Ti with ZrB2 and SiC. The Ti additive was completely consumed during the sintering process and converted to the ceramic compounds of TiC, TiB and TiSi2. In addition, another refractory phase of ZrC was also formed as a result of sidelong reaction of ZrB2 and SiC with the Ti additive.

KW - In-situ formed compounds

KW - Microstructure

KW - Phase evolution

KW - Spark plasma sintering

KW - Ti addition

KW - ZrB–SiC composite

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DO - 10.1016/j.ceramint.2018.07.011

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SN - 0272-8842

VL - 44

SP - 18078

EP - 18083

JO - Ceramics International

JF - Ceramics International

IS - 15

ER -

Microstructural development during spark plasma sintering of ZrB₂–SiC–Ti composite

Abstract

Keywords

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