JP2008239432A - 黒鉛−炭化珪素複合体及びその製造方法 - Google Patents
黒鉛−炭化珪素複合体及びその製造方法 Download PDFInfo
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- C04B35/573—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide obtained by reaction sintering or recrystallisation
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Abstract
【効果】本発明の黒鉛−炭化珪素複合体は耐酸化性に優れた材料であり、耐熱材料としての使用範囲が広がり、種々の用途に使用することが可能である。また、黒鉛材表面に炭化珪素層を形成する方法についても簡便であり、しかも品質のバラツキの少ない黒鉛−炭化珪素複合体を得ることが可能であり、工業的規模の生産にも十分耐え得るものである。
【選択図】なし
Description
(1)黒鉛基材の表面に炭化珪素粉末が溶融、圧着した状態で炭化珪素層が形成されていることを特徴とする黒鉛−炭化珪素複合体。
(2)炭化珪素粉末の平均粒子径が0.5〜50μmであることを特徴とする(1)記載の黒鉛−炭化珪素複合体。
(3)炭化珪素層の厚みが10〜300μmであることを特徴とする(1)又は(2)記載の黒鉛−炭化珪素複合体。
(4)ガス透過率が1.0×10-2cm2/s以下であることを特徴とする(1)〜(3)のいずれかに記載の黒鉛−炭化珪素複合体。
(5)黒鉛基材の表面に金属珪素粉末を溶射し、該溶射品を非酸化性雰囲気下1100〜1700℃の温度範囲で熱処理して、黒鉛基材の表面に炭化珪素粉末が溶融、圧着した状態で炭化珪素層を形成することを特徴とする黒鉛−炭化珪素複合体の製造方法。
(6)金属珪素粉末の平均粒子径が0.5〜50μmであることを特徴とする(5)記載の黒鉛−炭化珪素複合体の製造方法。
本発明の黒鉛−炭化珪素複合体は、黒鉛基材の表面に炭化珪素粉末が溶融、圧着した状態で炭化珪素層が形成されているものである。ここで、炭化珪素粉末が溶融、圧着した状態とは、炭化珪素が溶融した状態で黒鉛基材−炭化珪素あるいは炭化珪素−炭化珪素同士を、黒鉛基材と垂直方向の黒鉛基材に向かう力により接合している状態をいい、炭化珪素が点接触ではなく、楕円形状で面接触にて接合している状態をいう。
この場合、平均粒子径は、レーザー光回折法による粒度分布測定における質量平均値D50(即ち、累積質量が50%となるときの粒子径又はメジアン径)として測定した値である。
SiC粒子径の測定法には、沈降法、画像解析法、レーザー光回折法等があるが、測定が迅速で再現性が高い等の理由により、本発明ではレーザー光回折法で得られた値を用いる。
K=QL/△PA
K:ガス透過率(cm2/s) Q:通気量(Pa・cm3/s)
△P:試験片内外の圧力差(Pa) L:試験片の厚さ(cm)
A:ガス透過面積(cm2)
100mm×100mm×5mm(厚さ)のC/Cコンポジット板材全面に平均粒子径20μmの金属珪素粉末を金属珪素粉末層の厚さが50μmとなるようプラズマ溶射法により溶射した。次にこの溶射材をバッチ炉内に仕込み、減圧下1450℃の温度で5時間熱処理した。
得られた基材の断面観察及び表面層のX線回折分析を行ったところ、平均粒子径20μmの炭化珪素粉末が溶融、圧着してなる緑色の黒鉛−炭化珪素複合体であった。
なお、この黒鉛−炭化珪素複合体のガス透過率は1.0×10-5cm2/sであった。
得られた黒鉛−炭化珪素複合体の耐酸化性を評価するため、該黒鉛−炭化珪素複合体を大気中800℃で3時間保持した。冷却後、重量減少を測定したところ、−0.1wt%と殆ど重量変化のない耐酸化性に優れた材質であることが確認された。
炭化珪素層の形成のないC/Cコンポジットを実施例1と同様な方法で耐酸化性試験を実施した。ちなみにガス透過率は5.0×10-1cm2/sであった。
その結果、重量減少率は−88%となり、明らかに実施例1に比べ耐酸化性に劣るものであった。
Claims (6)
- 黒鉛基材の表面に炭化珪素粉末が溶融、圧着した状態で炭化珪素層が形成されていることを特徴とする黒鉛−炭化珪素複合体。
- 炭化珪素粉末の平均粒子径が0.5〜50μmであることを特徴とする請求項1記載の黒鉛−炭化珪素複合体。
- 炭化珪素層の厚みが10〜300μmであることを特徴とする請求項1又は2記載の黒鉛−炭化珪素複合体。
- ガス透過率が1.0×10-2cm2/s以下であることを特徴とする請求項1乃至3のいずれか1項記載の黒鉛−炭化珪素複合体。
- 黒鉛基材の表面に金属珪素粉末を溶射し、該溶射品を非酸化性雰囲気下1100〜1700℃の温度範囲で熱処理して、黒鉛基材の表面に炭化珪素粉末が溶融、圧着した状態で炭化珪素層を形成することを特徴とする黒鉛−炭化珪素複合体の製造方法。
- 金属珪素粉末の平均粒子径が0.5〜50μmであることを特徴とする請求項5記載の黒鉛−炭化珪素複合体の製造方法。
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JP2007084385A JP4438964B2 (ja) | 2007-03-28 | 2007-03-28 | 黒鉛−炭化珪素複合体の製造方法 |
US12/055,985 US20080241475A1 (en) | 2007-03-28 | 2008-03-26 | Graphite-silicon carbide composite and making method |
US12/684,645 US20100112231A1 (en) | 2007-03-28 | 2010-01-08 | Graphite-silicon carbide composite and making method |
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WO2017082147A1 (ja) * | 2015-11-11 | 2017-05-18 | 日本カーボン株式会社 | 黒鉛基材上に形成された被膜及びその製造方法 |
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US20100310860A1 (en) * | 2008-02-28 | 2010-12-09 | Changwon National University Industry Academy Cooperation Corps | Synthetic method for anti-oxidation ceramic coatings on graphite substrates |
FR2935636B1 (fr) | 2008-09-05 | 2011-06-24 | Commissariat Energie Atomique | Materiau a architecture multicouche, dedie a une mise en contact avec du silicium liquide |
JP7333172B2 (ja) | 2015-08-20 | 2023-08-24 | インテグリス・インコーポレーテッド | 炭化ケイ素/黒鉛複合材並びにそれを含む物品及び組立品 |
CN105523778A (zh) * | 2016-01-22 | 2016-04-27 | 青岛华杰硅碳科技有限公司 | 一种硅化石墨及其制备方法 |
CN105489837A (zh) * | 2016-01-22 | 2016-04-13 | 青岛华杰硅碳科技有限公司 | 一种电极及其应用 |
CN111848202B (zh) * | 2020-07-24 | 2022-09-02 | 西安超码科技有限公司 | 一种具有碳化硅/硅涂层的炭/炭导流筒及其制备方法 |
CN111893419B (zh) * | 2020-07-24 | 2022-05-13 | 西安超码科技有限公司 | 一种具有碳化硅/硅涂层的炭/炭保温筒及其制备方法 |
CN111848201B (zh) * | 2020-07-24 | 2022-09-02 | 西安超码科技有限公司 | 一种具有碳化硅/硅涂层的炭/炭坩埚及其制备方法 |
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DE3446286A1 (de) * | 1984-12-19 | 1986-06-19 | Sigri GmbH, 8901 Meitingen | Verfahren zum beschichten von kohlenstoff- und graphitkoerpern |
JPH0813713B2 (ja) * | 1990-10-11 | 1996-02-14 | 東芝セラミックス株式会社 | SiC被覆C/C複合材 |
JP3606472B2 (ja) * | 1994-07-12 | 2005-01-05 | 信越化学工業株式会社 | 熱分解窒化ホウ素被覆複層成形体及びその製造方法 |
US6228453B1 (en) * | 1995-06-07 | 2001-05-08 | Lanxide Technology Company, Lp | Composite materials comprising two jonal functions and methods for making the same |
JPH10279376A (ja) * | 1997-03-31 | 1998-10-20 | Toyo Tanso Kk | 炭素−炭化ケイ素複合材料を用いた連続鋳造用部材 |
US6998192B1 (en) * | 2002-08-29 | 2006-02-14 | Quallion Llc | Negative electrode for a nonaqueous battery |
AU2003302282A1 (en) * | 2002-11-26 | 2004-06-18 | Showa Denko K.K. | Electrode material comprising silicon and/or tin particles and production method and use thereof |
US7790316B2 (en) * | 2004-03-26 | 2010-09-07 | Shin-Etsu Chemical Co., Ltd. | Silicon composite particles, preparation thereof, and negative electrode material for non-aqueous electrolyte secondary cell |
JP4450192B2 (ja) * | 2004-07-01 | 2010-04-14 | 信越化学工業株式会社 | 珪素複合体及びその製造方法並びに非水電解質二次電池用負極材 |
US7658863B2 (en) * | 2004-07-30 | 2010-02-09 | Shin-Etsu Chemical Co., Ltd. | Si-C-O composite, making method, and non-aqueous electrolyte secondary cell negative electrode material |
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WO2017082147A1 (ja) * | 2015-11-11 | 2017-05-18 | 日本カーボン株式会社 | 黒鉛基材上に形成された被膜及びその製造方法 |
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