Formation and Microstructure of Silicide-Particle-Reinforced Si3N4 Composites with Crystallized Grain Boundary Phase of Yb2Si2O7

• 資料種別: 記事
• タイトル: Formation and Microstructure of Silicide-Particle-Reinforced Si3N4 Composites with Crystallized Grain Boundary Phase of Yb2Si2O7
• 著者・編者: 飯塚 建興; 日向 秀樹; 北 英紀
• 著者標目: 飯塚 建興; 日向 秀樹; 北 英紀
• 並列タイトル等: 結晶化したYb2Si2O7粒界相を持つシリサイド粒子強化Si3N4複合材料の作製と微構造
• タイトル（掲載誌）: 日本セラミックス協会学術論文誌 / 日本セラミックス協会 [編]
• 巻号年月日等（掲載誌）: 114(1336) 2006.12
• 掲載巻: 114
• 掲載号: 1336
• 掲載ページ: 1126～1132
• 掲載年月日（W3CDTF）: 2006-12
• ISSN（掲載誌）: 0914-5400
• ISSN-L（掲載誌）: 0914-5400
• 出版事項（掲載誌）: 東京 : 日本セラミックス協会
• 出版地（国名コード）: JP
• 本文の言語コード: eng
• 件名標目: Silicide; Ta3Si; Mo5Si3; Particle; Composite; Crystallization
• NDLC: ZP9
• 対象利用者: 一般
• 所蔵機関: 国立国会図書館
• 請求記号: Z17-249
• 連携機関・データベース: 国立国会図書館 : 国立国会図書館雑誌記事索引; https://ndlsearch.ndl.go.jp
• 書誌ID（NDLBibID）: 8601931; http://id.ndl.go.jp/bib/8601931
• 整理区分コード: 632

• 要約等: Silicide-particle-reinforced Si₃N₄ composites with a crystallized grain boundary phase of Yb₂Si₂O₇ were synthesized in-situ by hot-pressing Si₃N₄ with the metal oxides M_<i>p</i>O_<i>q</i> (silicide-forming oxides), which can react with Si₃N₄ to form silicide, and Yb₂O₃ as sintering additives. The reaction between Si₃N₄, silicide-forming oxide (Ta₂O₅ or MoO₃) and Yb₂O₃ at high temperatures generated silicide (Ta₃Si or Mo₅Si₃) particles and a grain boundary phase, Yb₂Si₂O₇, simultaneously. The silicide particles mainly existed at the grain boundaries, but a small amount of Ta₃Si particles were detected from Si₃N₄ grains. Ta₃Si particle grew up to a polyhedron shape, but Mo₅Si₃ particle to a spherical shape. To obtain the crystallized grain boundary phase of RE₂Si₂O₇, the molar ratio of Yb₂O₃ to M_<i>p</i>O_<i>q</i> should be adjusted to <i>q</i>/4 (<i>q</i>: the number of oxygen atoms in M_<i>p</i>O_<i>q</i>). However, because a small amount of oxygen was included in Si₃N₄ powder and existed on the surface of Si₃N₄ as SiO₂, the excess SiO₂ reacted with Si₃N₄ to generate a trace of Si₂N₂O grain. In the silicide-Yb₂Si₂O₇-Si₃N₄ composites, the grain boundary phases were crystallized, but thin amorphous films with a thickness of 1 nm were detected from the interfaces between the silicide particle, Si₃N₄ grain, and the grain boundary phase of Yb₂Si₂O₇. The dense silicide particles reinforced Si₃N₄ matrix composites can be obtained by using this in-situ synthesis method, and the flexural strength and fracture toughness of Ta₃Si-Yb₂Si₂O₇-Si₃N₄ composite were 1209 MPa, and 6.0 MPa•m^1/2, respectively.<br>
• DOI: 10.2109/jcersj.114.1126
• オンライン閲覧公開範囲: インターネット公開
• 連携機関・データベース: 科学技術振興機構 : J-STAGE; http://www.jstage.jst.go.jp

• 要約等: Silicide-particle-reinforced Si₃N₄ composites with a crystallized grain boundary phase of Yb₂Si₂O₇ were synthesized in-situ by hot-pressing Si₃N₄ with the metal oxides M_<i>p</i>O_<i>q</i> (silicide-forming oxides), which can react with Si₃N₄ to form silicide, and Yb₂O₃ as sintering additives. The reaction between Si₃N₄, silicide-forming oxide (Ta₂O₅ or MoO₃) and Yb₂O₃ at high temperatures generated silicide (Ta₃Si or Mo₅Si₃) particles and a grain boundary phase, Yb₂Si₂O₇, simultaneously. The silicide particles mainly existed at the grain boundaries, but a small amount of Ta₃Si particles were detected from Si₃N₄ grains. Ta₃Si particle grew up to a polyhedron shape, but Mo₅Si₃ particle to a spherical shape. To obtain the crystallized grain boundary phase of RE₂Si₂O₇, the molar ratio of Yb₂O₃ to M_<i>p</i>O_<i>q</i> should be adjusted to <i>q</i>/4 (<i>q</i>: the number of oxygen atoms in M_<i>p</i>O_<i>q</i>). However, because a small amount of oxygen was included in Si₃N₄ powder and existed on the surface of Si₃N₄ as SiO₂, the excess SiO₂ reacted with Si₃N₄ to generate a trace of Si₂N₂O grain. In the silicide-Yb₂Si₂O₇-Si₃N₄ composites, the grain boundary phases were crystallized, but thin amorphous films with a thickness of 1 nm were detected from the interfaces between the silicide particle, Si₃N₄ grain, and the grain boundary phase of Yb₂Si₂O₇. The dense silicide particles reinforced Si₃N₄ matrix composites can be obtained by using this in-situ synthesis method, and the flexural strength and fracture toughness of Ta₃Si-Yb₂Si₂O₇-Si₃N₄ composite were 1209 MPa, and 6.0 MPa•m^1/2, respectively.<br>
• DOI: 10.2109/jcersj.114.1126; https://doi.org/10.2109/jcersj.114.1126
• オンライン閲覧公開範囲: インターネット公開
• 関連情報（URI）: http://id.ndl.go.jp/bib/8601931; https://ndlsearch.ndl.go.jp/books/R000000004-I8601931; http://www.jstage.jst.go.jp/article/jcersj/114/1336/114_1336_1126/_pdf
• 参照: Microstructural Evolution and Mechanical Properties of Si ₃ N ₄ with Yb ₂ O ₃ as a Sintering Additive; https://cir.nii.ac.jp/crid/1360011143935942912; Kinetics of Oxidation of Hot‐Pressed Silicon Nitride Containing Magnesia; https://cir.nii.ac.jp/crid/1360574094186053376; Hot-pressed Si3N4-32% SiC nanocomposite from amorphous Si-C-N powder with improved strength above 1200 �C; https://cir.nii.ac.jp/crid/1360855568634965504; Oxidation and Strength Retention of Monolithic Si ₃ N ₄ and Nanocomposite Si ₃ N ₄ ‐SiC with Yb ₂ O ₃ as a Sintering Aid; https://cir.nii.ac.jp/crid/1361137044131710336; Oxidation behaviour of the sintered Si3N4-Y2O3-Al2O3 system; https://cir.nii.ac.jp/crid/1361418519980133760; Oxidation Behavior and Effect of Oxidation on Strength of Si₃N₄/SiC Nanocomposites; https://cir.nii.ac.jp/crid/1361418521067502592; Oxidation behaviour and strength degradation of a Yb 2 O 3 -SiO 2 -doped hot-pressed silicon nitride between 1200 and 1500°C; https://cir.nii.ac.jp/crid/1361418521242713216; In situ synthesis of Mo5Si3 particle reinforced Si3N4 composite with crystallized grain boundary phase of Yb2Si2O7; https://cir.nii.ac.jp/crid/1362262944038110080; The effects of ytterbium oxide on the microstructure and R-curve behaviors of silicon nitride; https://cir.nii.ac.jp/crid/1362262945192057984; Microstructures and Properties of Mo ₅ Si ₃ ‐Particle‐Reinforced Si ₃ N ₄ ‐Matrix Composites; https://cir.nii.ac.jp/crid/1362544419922455936; Oxidation behavior and effect of oxidation on mechanical properties of Mo5Si3 particle-reinforced Si3N4 composites; https://cir.nii.ac.jp/crid/1362825893795480448; Oxidation Behavior of Rare‐Earth Disilicate–Silicon Nitride Ceramics; https://cir.nii.ac.jp/crid/1362825895525957376; High temperature strength and oxidation behaviour of hot-pressed silicon nitride-disilicate ceramics; https://cir.nii.ac.jp/crid/1363670319764961920; Effect of Y2O3 and Yb2O3 on the microstructure and mechanical properties of silicon nitride; https://cir.nii.ac.jp/crid/1363951793423948416; The effect of additives on sintering behavior and strength retention in silicon nitride with RE-disilicate; https://cir.nii.ac.jp/crid/1363951794491875840; Strength and Creep Behavior of Rare‐Earth Disilicate–Silicon Nitride Ceramics; https://cir.nii.ac.jp/crid/1363951794874110720; Fabrication and Secondary‐Phase Crystallization of Rare‐Earth Disilicate–Silicon Nitride Ceramics; https://cir.nii.ac.jp/crid/1363951796204859008; Phase Relations and Stability Studies in the Si ₃ N ₄ ‐SiO ₂ ‐Y ₂ O ₃ Pseudoternary System; https://cir.nii.ac.jp/crid/1364233269332879872; The effects of post heat-treatment on the microstructure and fracture behaviors of Yb2O3-doped Si3N4; https://cir.nii.ac.jp/crid/1364233269345414912; Microstructure and mechanical properties of Si3N4/SiC composites; https://cir.nii.ac.jp/crid/1364233271180116736; 酸化タンタルの添加によるＹｂ２Ｓｉ２Ｏ７粒界相を持つＭｏ５Ｓｉ３粒子強化Ｓｉ３Ｎ４複合材料の微構造への影響; https://cir.nii.ac.jp/crid/1390001205277980672; Y₂O₃とAl₂O₃を添加剤として加圧焼結したSi₃N₄の酸化挙動; https://cir.nii.ac.jp/crid/1390282680192108160; Ｍｏ５Ｓｉ３粒子強化Ｓｉ３Ｎ４複合材料の作製と摺動特性; https://cir.nii.ac.jp/crid/1390282680224674432; 焼結過程の反応で生成したＦｅ５Ｓｉ３粒子分散Ｓｉ３Ｎ４の微細組織; https://cir.nii.ac.jp/crid/1390282680226603776
• 連携機関・データベース: 国立情報学研究所 : CiNii Research; https://cir.nii.ac.jp/
• 提供元機関・データベース: Japan Link Center; https://japanlinkcenter.org/top; 雑誌記事索引データベース; https://ndlsearch.ndl.go.jp; Crossref; https://www.crossref.org; CiNii Articles
• 書誌ID（NDLBibID）: 8601931; http://id.ndl.go.jp/bib/8601931
• NII論文ID: 110004997694