Nano-diamond reinforced ZrB2–SiC composites

Mehdi Fattahi; Yashar Azizian-Kalandaragh; Seyed Ali Delbari; Abbas Sabahi Namini; Zohre Ahmadi; Mehdi Shahedi Asl

doi:10.1016/j.ceramint.2020.01.008

Nano-diamond reinforced ZrB₂–SiC composites

Mehdi Fattahi, Yashar Azizian-Kalandaragh, Seyed Ali Delbari, Abbas Sabahi Namini, Zohre Ahmadi, Mehdi Shahedi Asl^*

^*Corresponding author for this work

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

67 Citations (Scopus)

Abstract

The effect of adding various amounts of nano-diamond additive (0, 1, 2, and 3 wt%) on the densification behavior and mechanical properties of ZrB₂-25 vol% SiC samples were investigated in this research. All samples were spark plasma sintered at 1900 °C under 40 MPa external pressure for 7 min. Relative density (RD) values higher than 99.9% were obtained for the samples with 0, 1, and 2 wt% nano-diamond, while adding 3 wt% diamond dropped the RD by ~1.2%. The XRD and microstructural evaluations revealed the formation of some in-situ phases, namely ZrC and B₄C. The highest Vickers hardness (24.7 GPa) and fracture toughness (5.8 MPa m^1/2) were achieved for the samples doped with 2 and 3 wt% nano-diamond, respectively. Ultimately, the SEM micrographs indicated the role of different toughening mechanisms on obtaining such a high value of fracture toughness.

Original language	English
Pages (from-to)	10172-10179
Number of pages	8
Journal	Ceramics International
Volume	46
Issue number	8
DOIs	https://doi.org/10.1016/j.ceramint.2020.01.008
Publication status	Published - 1 Jun 2020
Externally published	Yes

Keywords

Nano-diamond
SiC
SPS
ZrB

Access to Document

10.1016/j.ceramint.2020.01.008

Cite this

@article{4aa68e1cefa043b89dd10b44ee30d556,

title = "Nano-diamond reinforced ZrB2–SiC composites",

abstract = "The effect of adding various amounts of nano-diamond additive (0, 1, 2, and 3 wt%) on the densification behavior and mechanical properties of ZrB2-25 vol% SiC samples were investigated in this research. All samples were spark plasma sintered at 1900 °C under 40 MPa external pressure for 7 min. Relative density (RD) values higher than 99.9% were obtained for the samples with 0, 1, and 2 wt% nano-diamond, while adding 3 wt% diamond dropped the RD by ~1.2%. The XRD and microstructural evaluations revealed the formation of some in-situ phases, namely ZrC and B4C. The highest Vickers hardness (24.7 GPa) and fracture toughness (5.8 MPa m1/2) were achieved for the samples doped with 2 and 3 wt% nano-diamond, respectively. Ultimately, the SEM micrographs indicated the role of different toughening mechanisms on obtaining such a high value of fracture toughness.",

keywords = "Nano-diamond, SiC, SPS, ZrB",

author = "Mehdi Fattahi and Yashar Azizian-Kalandaragh and Delbari, {Seyed Ali} and {Sabahi Namini}, Abbas and Zohre Ahmadi and {Shahedi Asl}, Mehdi",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd and Techna Group S.r.l.",

year = "2020",

month = jun,

day = "1",

doi = "10.1016/j.ceramint.2020.01.008",

language = "English",

volume = "46",

pages = "10172--10179",

journal = "Ceramics International",

issn = "0272-8842",

number = "8",

}

TY - JOUR

T1 - Nano-diamond reinforced ZrB2–SiC composites

AU - Fattahi, Mehdi

AU - Azizian-Kalandaragh, Yashar

AU - Delbari, Seyed Ali

AU - Sabahi Namini, Abbas

AU - Ahmadi, Zohre

AU - Shahedi Asl, Mehdi

PY - 2020/6/1

Y1 - 2020/6/1

N2 - The effect of adding various amounts of nano-diamond additive (0, 1, 2, and 3 wt%) on the densification behavior and mechanical properties of ZrB2-25 vol% SiC samples were investigated in this research. All samples were spark plasma sintered at 1900 °C under 40 MPa external pressure for 7 min. Relative density (RD) values higher than 99.9% were obtained for the samples with 0, 1, and 2 wt% nano-diamond, while adding 3 wt% diamond dropped the RD by ~1.2%. The XRD and microstructural evaluations revealed the formation of some in-situ phases, namely ZrC and B4C. The highest Vickers hardness (24.7 GPa) and fracture toughness (5.8 MPa m1/2) were achieved for the samples doped with 2 and 3 wt% nano-diamond, respectively. Ultimately, the SEM micrographs indicated the role of different toughening mechanisms on obtaining such a high value of fracture toughness.

AB - The effect of adding various amounts of nano-diamond additive (0, 1, 2, and 3 wt%) on the densification behavior and mechanical properties of ZrB2-25 vol% SiC samples were investigated in this research. All samples were spark plasma sintered at 1900 °C under 40 MPa external pressure for 7 min. Relative density (RD) values higher than 99.9% were obtained for the samples with 0, 1, and 2 wt% nano-diamond, while adding 3 wt% diamond dropped the RD by ~1.2%. The XRD and microstructural evaluations revealed the formation of some in-situ phases, namely ZrC and B4C. The highest Vickers hardness (24.7 GPa) and fracture toughness (5.8 MPa m1/2) were achieved for the samples doped with 2 and 3 wt% nano-diamond, respectively. Ultimately, the SEM micrographs indicated the role of different toughening mechanisms on obtaining such a high value of fracture toughness.

KW - Nano-diamond

KW - SiC

KW - SPS

KW - ZrB

UR - http://www.scopus.com/inward/record.url?scp=85077360389&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2020.01.008

DO - 10.1016/j.ceramint.2020.01.008

M3 - Article

AN - SCOPUS:85077360389

SN - 0272-8842

VL - 46

SP - 10172

EP - 10179

JO - Ceramics International

JF - Ceramics International

IS - 8

ER -

Nano-diamond reinforced ZrB₂–SiC composites

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this