Change in microstructures and physical properties of ZrB2-SiC ceramics hot-pressed with a variety of SiC sources

Seongwon Kim, Jung Min Chae, Sung Min Lee, Yoon Suk Oh, Hyung Tae Kim, Byungkoog Jang

研究成果: ジャーナルへの寄稿記事

24 引用 (Scopus)

抄録

ZrB2-SiC ceramics were fabricated by hot pressing with a variety of SiC sources in order to examine the effect of the SiC size on the microstructures and physical properties, such as hardness and thermal conductivities, of ZrB2-SiC composite ceramics. Three different ZrB2-SiC ceramics, ZPS (ZrB2-20 vol% polycarbosilane), ZFS (ZrB2-20 vol% fine-grained SiC), and ZNS (ZrB2-20 vol% nano-sized SiC), were prepared for this study. PCS is effectively transformed into β-SiC after hot pressing. By using PCS as a precursor for SiC, ZrB2 particles are surrounded by fine particles of SiC, which results in the grain-growth inhibition of ZrB2. The effects of the SiC size on the microstructures and the physical properties of ZrB2-SiC ceramics were also investigated. ZrB2-SiC ceramics were produced by using various SiC sources in order to investigate the grain-growth inhibition and the mechanical/thermal properties of ZrB2-SiC. The sizes of ZrB2 or SiC particles in the sintered bodies highly depend on the initial size of SiC. ZrB2-SiC ceramics with smaller SiC show enhanced mechanical properties, consistently with the Hall-Petch relation. The thermal conductivities of ZrB2-SiC ceramics with nano-SiC or PCS-derived SiC are higher than that of ceramics with conventional SiC, which can be explained by the percolation theory.

元の言語英語
ページ(範囲)3477-3483
ページ数7
ジャーナルCeramics International
40
発行部数2
DOI
出版物ステータス出版済み - 3 1 2014

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Hot pressing
Grain growth
Thermal conductivity
Physical properties
Microstructure
Thermodynamic properties
Hardness
Mechanical properties
Composite materials

All Science Journal Classification (ASJC) codes

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

これを引用

Change in microstructures and physical properties of ZrB2-SiC ceramics hot-pressed with a variety of SiC sources. / Kim, Seongwon; Chae, Jung Min; Lee, Sung Min; Oh, Yoon Suk; Kim, Hyung Tae; Jang, Byungkoog.

:: Ceramics International, 巻 40, 番号 2, 01.03.2014, p. 3477-3483.

研究成果: ジャーナルへの寄稿記事

Kim, Seongwon ; Chae, Jung Min ; Lee, Sung Min ; Oh, Yoon Suk ; Kim, Hyung Tae ; Jang, Byungkoog. / Change in microstructures and physical properties of ZrB2-SiC ceramics hot-pressed with a variety of SiC sources. :: Ceramics International. 2014 ; 巻 40, 番号 2. pp. 3477-3483.
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abstract = "ZrB2-SiC ceramics were fabricated by hot pressing with a variety of SiC sources in order to examine the effect of the SiC size on the microstructures and physical properties, such as hardness and thermal conductivities, of ZrB2-SiC composite ceramics. Three different ZrB2-SiC ceramics, ZPS (ZrB2-20 vol{\%} polycarbosilane), ZFS (ZrB2-20 vol{\%} fine-grained SiC), and ZNS (ZrB2-20 vol{\%} nano-sized SiC), were prepared for this study. PCS is effectively transformed into β-SiC after hot pressing. By using PCS as a precursor for SiC, ZrB2 particles are surrounded by fine particles of SiC, which results in the grain-growth inhibition of ZrB2. The effects of the SiC size on the microstructures and the physical properties of ZrB2-SiC ceramics were also investigated. ZrB2-SiC ceramics were produced by using various SiC sources in order to investigate the grain-growth inhibition and the mechanical/thermal properties of ZrB2-SiC. The sizes of ZrB2 or SiC particles in the sintered bodies highly depend on the initial size of SiC. ZrB2-SiC ceramics with smaller SiC show enhanced mechanical properties, consistently with the Hall-Petch relation. The thermal conductivities of ZrB2-SiC ceramics with nano-SiC or PCS-derived SiC are higher than that of ceramics with conventional SiC, which can be explained by the percolation theory.",
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AB - ZrB2-SiC ceramics were fabricated by hot pressing with a variety of SiC sources in order to examine the effect of the SiC size on the microstructures and physical properties, such as hardness and thermal conductivities, of ZrB2-SiC composite ceramics. Three different ZrB2-SiC ceramics, ZPS (ZrB2-20 vol% polycarbosilane), ZFS (ZrB2-20 vol% fine-grained SiC), and ZNS (ZrB2-20 vol% nano-sized SiC), were prepared for this study. PCS is effectively transformed into β-SiC after hot pressing. By using PCS as a precursor for SiC, ZrB2 particles are surrounded by fine particles of SiC, which results in the grain-growth inhibition of ZrB2. The effects of the SiC size on the microstructures and the physical properties of ZrB2-SiC ceramics were also investigated. ZrB2-SiC ceramics were produced by using various SiC sources in order to investigate the grain-growth inhibition and the mechanical/thermal properties of ZrB2-SiC. The sizes of ZrB2 or SiC particles in the sintered bodies highly depend on the initial size of SiC. ZrB2-SiC ceramics with smaller SiC show enhanced mechanical properties, consistently with the Hall-Petch relation. The thermal conductivities of ZrB2-SiC ceramics with nano-SiC or PCS-derived SiC are higher than that of ceramics with conventional SiC, which can be explained by the percolation theory.

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