TiB₂-(2mol% Y₂O₃-ZrO₂) 複合材料の力学的性質と焼結性に及ぼすSiC添加の影響

• 鳥塚 史郎

  NKK中央研究所

• 原田 淳

  NKK中央研究所

• 山本 秀治

  NKK中央研究所

• 西尾 浩明

  NKK中央研究所

• 千野 淳

  NKK中央研究所

• 石橋 耀一

  NKK中央研究所

書誌事項

タイトル別名

• Effects of SiC Addition on the Mechanical Properties and Sinterability of TiB₂-(2mol% Y₂O₃-ZrO₂) Composite
• TiB2 2m ol Y2O3 ZrO2 フクゴウ ザイリョウ ノ リキガクテ

抄録

Ceramic TiB₂-19.0-19.5wt% (2mol% Y₂O₃-ZrO₂) composites with 2.5-5.0wt% SiC were fabricated by hot isostatic pressing (HIP) with and without a glass encapsulation. The effects of SiC addition on the mechanical properties and siterability of TiB₂-20wt% (2mol% Y₂O₃-ZrO₂) HIP'ed bodies were investigated. The addition of SiC improved the sinterability of TiB₂-20wt% (2mol% Y₂O₃-ZrO₂) appreciably. Composites of TiB₂-19.0-19.5wt% (2mol% Y₂O₃-ZrO₂) with 2.5-5.0wt% SiC densified up to 96.7% of their theoretical densities by vacuum sintering at 1700°C for 14.4ks. These sintered bodies almost fully densified by capsule-free-HIP. On the other hand, TiB₂-20wt% (2mol% Y₂O₃-ZrO₂) densified up to 63.7% by the same vacuum sintering. The addition of SiC was also effective in retarding the grain growth of TiB₂ and ZrO₂. The grain sizes of TiB₂ and ZrO₂ of TiB₂-19.0-19.5wt% (2mol% Y₂O₃-ZrO₂)-2.5-5.0wt% SiC HIP'ed bodies were about 1.5 and 1.2μm, respectively. They were about 2/3 of those of TiB₂-20wt% (2mol% Y₂O₃-ZrO₂) HIP'ed bodies. The three-point bending strengths of TiB₂-19.0-19.5wt% (2mol% Y₂O₃-ZrO₂)-2.5-5.0wt% SiC glass-encapsulated-HIP'ed bodies were 1240MPa, which is slightly higher than that of TiB₂-20wt% (2mol% Y₂O₃-ZrO₂) HIP'ed bodies. Vickers hardness and fracture toughness were not affected by the addition of 2.5-5.0wt% SiC. The mechaical properties of TiB₂-(2mol% Y₂O₃-ZrO₂) HIP'ed bodies were controlled by the monoclinic ZrO₂ ratio in ZrO₂ and monoclinic ZrO₂ content in HIP'ed bodies, as we have reported in the previous paper. The addition of SiC affected them only slightly, so that the mechanical properties were also little affected.

収録刊行物

• Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌)

  Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌) 100 (1161), 691-696, 1992

  公益社団法人 日本セラミックス協会

キーワード

• TiB₂
• ZrO₂
• SiC
• HIP
• Mechanical properties
• Sinterability
• Y₂O₃
• Composite
• Monoclinic
• Tetragonal

詳細情報

• CRID: 1390282680255944192
• NII論文ID: 110002290256
• NII書誌ID: AN10040326
• DOI: 10.2109/jcersj.100.691
• COI: 1:CAS:528:DyaK38XksFCgsr8%3D
• ISSN: 18821022
• ISSN: 09145400
• NDL書誌ID: 3771327
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3771327
• Web Site: http://www.jstage.jst.go.jp/article/jcersj1988/100/1161/100_1161_691/_pdf
• データソース種別:
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  • NDL
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• 抄録ライセンスフラグ: 使用不可