Sintered TiO2 powder containing metallic Co binder prepared via mechanical carbonization, and its mechanical properties

Seungkyun Yim; Ilsong Park; Jeshin Park

doi:10.1016/j.ceramint.2018.05.001

Sintered TiO₂ powder containing metallic Co binder prepared via mechanical carbonization, and its mechanical properties

Seungkyun Yim, Ilsong Park, Jeshin Park

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

5 Citations (Scopus)

Abstract

A TiO₂-Co-a composite powder was prepared via carbonizing and selective oxidation processing of a Ti-Co alloy. The conventionally mixed TiO₂-Co-c composite powder and pure TiO₂ were sintered at 1100, 1200, 1300, 1400 °C, respectively. The structural characterization was performed using X-ray diffraction, field emission scattering electron microscopy (FE-SEM), and transmission electron microscopy (TEM). The sintered samples were more densified, and melted bonding occurred at temperature higher than 1300 °C. The flexural strength and fracture toughness of the TiO₂-Co-a sample were higher than those of the TiO₂ and TiO₂-Co-c sintered at temperature higher than 1300 °C, while the Vickers hardness of TiO₂-Co-a was the lowest at all sintering temperatures. The sintered TiO₂-Co-a sample was more ductile and strengthened than the TiO₂-Co-c sample with added metallic Co binder via mechanical mixing. The enhanced mechanical properties of the TiO₂-Co-a sample were due to the fine dispersion of the metallic Co binder wetted with a TiO₂ matrix.

Original language	English
Pages (from-to)	14044-14052
Number of pages	9
Journal	Ceramics International
Volume	44
Issue number	12
DOIs	https://doi.org/10.1016/j.ceramint.2018.05.001
Publication status	Published - 2018 Aug 15
Externally published	Yes

Keywords

Carbonization
Ceramic matrix composite
Mechanical properties
Metallic binder
Microstructure

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

Access to Document

10.1016/j.ceramint.2018.05.001

Cite this

@article{b5726cc293bb458bad1457e7c1fdb433,

title = "Sintered TiO2 powder containing metallic Co binder prepared via mechanical carbonization, and its mechanical properties",

abstract = "A TiO2-Co-a composite powder was prepared via carbonizing and selective oxidation processing of a Ti-Co alloy. The conventionally mixed TiO2-Co-c composite powder and pure TiO2 were sintered at 1100, 1200, 1300, 1400 °C, respectively. The structural characterization was performed using X-ray diffraction, field emission scattering electron microscopy (FE-SEM), and transmission electron microscopy (TEM). The sintered samples were more densified, and melted bonding occurred at temperature higher than 1300 °C. The flexural strength and fracture toughness of the TiO2-Co-a sample were higher than those of the TiO2 and TiO2-Co-c sintered at temperature higher than 1300 °C, while the Vickers hardness of TiO2-Co-a was the lowest at all sintering temperatures. The sintered TiO2-Co-a sample was more ductile and strengthened than the TiO2-Co-c sample with added metallic Co binder via mechanical mixing. The enhanced mechanical properties of the TiO2-Co-a sample were due to the fine dispersion of the metallic Co binder wetted with a TiO2 matrix.",

keywords = "Carbonization, Ceramic matrix composite, Mechanical properties, Metallic binder, Microstructure",

author = "Seungkyun Yim and Ilsong Park and Jeshin Park",

note = "Funding Information: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) , funded by the Ministry of Education ( NRF-2014R1A1A2057485 ). Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd and Techna Group S.r.l.",

year = "2018",

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doi = "10.1016/j.ceramint.2018.05.001",

language = "English",

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T1 - Sintered TiO2 powder containing metallic Co binder prepared via mechanical carbonization, and its mechanical properties

AU - Yim, Seungkyun

AU - Park, Ilsong

AU - Park, Jeshin

N1 - Funding Information: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) , funded by the Ministry of Education ( NRF-2014R1A1A2057485 ). Publisher Copyright: © 2018 Elsevier Ltd and Techna Group S.r.l.

PY - 2018/8/15

Y1 - 2018/8/15

N2 - A TiO2-Co-a composite powder was prepared via carbonizing and selective oxidation processing of a Ti-Co alloy. The conventionally mixed TiO2-Co-c composite powder and pure TiO2 were sintered at 1100, 1200, 1300, 1400 °C, respectively. The structural characterization was performed using X-ray diffraction, field emission scattering electron microscopy (FE-SEM), and transmission electron microscopy (TEM). The sintered samples were more densified, and melted bonding occurred at temperature higher than 1300 °C. The flexural strength and fracture toughness of the TiO2-Co-a sample were higher than those of the TiO2 and TiO2-Co-c sintered at temperature higher than 1300 °C, while the Vickers hardness of TiO2-Co-a was the lowest at all sintering temperatures. The sintered TiO2-Co-a sample was more ductile and strengthened than the TiO2-Co-c sample with added metallic Co binder via mechanical mixing. The enhanced mechanical properties of the TiO2-Co-a sample were due to the fine dispersion of the metallic Co binder wetted with a TiO2 matrix.

AB - A TiO2-Co-a composite powder was prepared via carbonizing and selective oxidation processing of a Ti-Co alloy. The conventionally mixed TiO2-Co-c composite powder and pure TiO2 were sintered at 1100, 1200, 1300, 1400 °C, respectively. The structural characterization was performed using X-ray diffraction, field emission scattering electron microscopy (FE-SEM), and transmission electron microscopy (TEM). The sintered samples were more densified, and melted bonding occurred at temperature higher than 1300 °C. The flexural strength and fracture toughness of the TiO2-Co-a sample were higher than those of the TiO2 and TiO2-Co-c sintered at temperature higher than 1300 °C, while the Vickers hardness of TiO2-Co-a was the lowest at all sintering temperatures. The sintered TiO2-Co-a sample was more ductile and strengthened than the TiO2-Co-c sample with added metallic Co binder via mechanical mixing. The enhanced mechanical properties of the TiO2-Co-a sample were due to the fine dispersion of the metallic Co binder wetted with a TiO2 matrix.

KW - Carbonization

KW - Ceramic matrix composite

KW - Mechanical properties

KW - Metallic binder

KW - Microstructure

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