JP2018177635A - 保護セラミックコーティングを有するセラミックス基複合材料(cmc)の処理方法 - Google Patents
保護セラミックコーティングを有するセラミックス基複合材料(cmc)の処理方法 Download PDFInfo
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- JP2018177635A JP2018177635A JP2018079603A JP2018079603A JP2018177635A JP 2018177635 A JP2018177635 A JP 2018177635A JP 2018079603 A JP2018079603 A JP 2018079603A JP 2018079603 A JP2018079603 A JP 2018079603A JP 2018177635 A JP2018177635 A JP 2018177635A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B18/00—Layered products essentially comprising ceramics, e.g. refractory products
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Abstract
Description
本特許文献は、米国特許法第119条(e)の下で、2017年11月21日に出願された米国特許出願第62/589,181号、及び2017年4月19日に出願された米国特許出願第62/487,284号に対する優先権の利益を主張する。これらの出願は両方とも、参照によりそれら全体が本明細書に組み込まれる。
SiC粒子を充填したSiC繊維骨格を含む含浸繊維プリフォームを、当該技術分野で知られている繊維集合方法及びスラリー浸透方法によって形成する。スラリー浸透の後、炭素繊維ベールを、この例ではサイズ約5cm×15cmのパネルである含浸繊維プリフォームの第1の表面に適合するように切断し、炭素繊維ベールを第1の表面に適用する。炭素繊維ベールの厚さは約0.13mmである。表面スラリーは、ポリカルボシランと公称サイズで約3.5ミクロンのSiC粒子とを混合することによって形成する。SiCボールを使用して、ボールミルで約4時間混合を行う。完全に混合した後、表面スラリーを炭素繊維ベールの上に広げて繊維プリフォームの表面に塗布し、余分な表面スラリーを除去する。繊維プリフォームを反対側にひっくり返して、繊維プリフォームの第2の表面を露出させ、炭素繊維ベールを第2の表面に適用するステップ、表面スラリー配合物を炭素繊維ベールの上に塗布するステップ、次いで余分な表面スラリーを除去するステップを含むプロセスを繰り返す。表面スラリーでコーティングした後、コーティングされたプリフォームを鋼板の間に置き、空気中で230℃の温度で1時間ホットプレスして、表面スラリー配合物を「プレス硬化」させて、硬化ポリカルボシランマトリックス中にSiC粒子及び炭素繊維ベールを含む複合層を形成する。硬化後、コーティングされたプリフォームを、制御環境において(例えば、アルゴン分圧下で)、1000℃の温度で1時間加熱して、硬化ポリカルボシランを熱分解させ、それによって、含浸繊維プリフォーム上に(炭素繊維ベール由来の)炭素を含む多孔質セラミックコーティングを形成する。熱分解後、含浸繊維プリフォーム及びその上を覆っているコーティングに、ケイ素の溶融温度(Tm)以上の温度でケイ素を含む溶融物を浸透させて、これにより、緻密化されたセラミックス基複合体及び保護セラミックコーティングを形成する。上記のように形成されたCMC本体430及び保護セラミックコーティング440の断面図を、図4の画像に示す。
SiC粒子を充填したSiC繊維骨格を含む含浸繊維プリフォームを、当該技術分野で知られている繊維集合方法及びスラリー浸透方法によって形成する。繊維プリフォームのスラリー浸透の後、表面スラリーを、水と公称サイズで約3.5ミクロンのSiC粒子とを混合することによって形成する。先の実施例と同様に、SiCボールを使用して、ボールミルで約4時間混合を行ってもよい。結合剤、分散剤及び/又は反応性元素(1つ又は複数)も表面スラリーに含まれていてもよい。この実施例における固体含量は約20体積%である。完全に混合した後、表面スラリーを含浸繊維プリフォームの表面に塗布し、乾燥して、SiC粒子の乾燥多孔質層を形成する。次に、乾燥多孔質層上にポリカルボシランを堆積して、SiC粒子間のスペースに浸漬又は浸透させ、余分なポリカルボシランを除去し、230℃で1時間加熱することにより硬化ポリカルボシラン及びSiC固体粒子を含む複合層を形成する。硬化後、複合層を、制御環境において(例えば、アルゴン分圧下で)、1000℃の温度で1時間加熱して、硬化ポリカルボシランを熱分解させ、含浸繊維プリフォーム上に多孔質セラミックコーティングを形成する。熱分解後、繊維プリフォーム及びその上を覆っている多孔質コーティングに、ケイ素の溶融温度(Tm)以上の温度でケイ素を含む溶融物を浸透させて、これにより、緻密化されたセラミックス基複合体及び保護セラミックコーティングを形成する。CMC本体530及び保護セラミックコーティング540の断面図を、図5の画像に示す。
6.3gのSMP-500(Starfire(登録商標)Systems)を、3gのSiC粉末と完全に混合する。得られたポリマー/SiCスラリー混合物(「第1の表面スラリー」)を、厚さ0.005"の炭素ベールに含浸させ、スラリー浸透した2"×6"繊維プリフォームの両面に塗布する。スラリーでコーティングされた含浸繊維プリフォームを、ステンレス工具の間に置き、第1の表面スラリーを230℃で硬化させてプリフォームの両面に複合層を形成する。次いで、複合層を部分Ar雰囲気の減圧下、1300℃で熱分解して、プリフォーム上に多孔質セラミック層を形成する。SiC粒子、分散剤、結合剤及び水を含む第2の表面スラリーを調製し、多孔質セラミック層に真空含浸させてすべての熱分解クラックを埋める。乾燥すると、第2の表面スラリーは、表面層を形成し、この表面層は、溶融浸透の前に(例えば、220グリットサンドペーパーで)研磨してもよい。図6の光学顕微鏡写真は、CMC本体630上を覆っている保護セラミックコーティング640上にある、得られた緻密化された表面層650の典型的な微細構造を示す。顕著な熱分解クラックは観察されない。
322 熱分解クラック
324 多孔質セラミック層
326 含浸繊維プリフォーム
430 CMC本体
440 保護セラミックコーティング
530 CMC本体
540 保護セラミックコーティング
630 CMC本体
640 保護セラミックコーティング
650 表面層
Claims (20)
- 保護セラミックコーティングを有するセラミックス基複合材料の製造方法であって、
粒子状物質を充填したセラミック繊維骨格を含む含浸繊維プリフォームの外表面上に第1の表面スラリーを塗布するステップであって、第1の表面スラリーがケイ素を含む流動性プレセラミックポリマー中に分散したセラミック固体粒子を含むステップ、
流動性プレセラミックポリマーを硬化させて複合層を外表面上に形成するステップであって、複合層が、セラミック固体粒子が分散された硬化したプレセラミックポリマーを含むステップ、
硬化したプレセラミックポリマーを熱分解して外表面上に炭化ケイ素を含む多孔質セラミック層を形成するステップ、
含浸繊維プリフォーム及び多孔質セラミック層にケイ素を含む溶融材料を浸透させるステップ、並びに
浸透後、溶融材料を冷却して、それによって保護セラミックコーティングを上に有するセラミックス基複合体を形成するステップ
を含む方法。 - 第1の表面スラリーを塗布する前に、外表面上に炭素繊維ベールを配置するステップをさらに含み、外表面に第1の表面スラリーを塗布するステップが炭素繊維ベールの上に第1の表面スラリーを堆積させるステップを含む、請求項1に記載の方法。
- セラミック固体粒子が炭化ケイ素及び/又は窒化ケイ素を含み、
第1の表面スラリーが、カーボンブラック、ダイヤモンド、グラファイト、モリブデン及びタングステンからなる群から選択される、1つ以上の反応性元素をさらに含む、請求項1に記載の方法。 - 熱分解の後及び浸透の前に、
第2の表面スラリーを多孔質セラミック層上に塗布して熱分解中に形成されたクラックを埋めるステップであって、第2の表面スラリーが水性又は有機溶媒中に分散したセラミック粒子を含むステップ、及び
第2の表面スラリーを乾燥させて多孔質セラミック層上に表面層を形成するステップをさらに含み、
浸透及び冷却が、保護セラミックコーティング上に緻密化された表面層を形成するための表面層の浸透及び冷却を含む、請求項1に記載の方法。 - セラミック粒子が炭化ケイ素及び/又は窒化ケイ素を含み、
第2の表面スラリーが、グラファイト、ダイヤモンド、カーボンブラック、モリブデン及びタングステンからなる群から選択される、1つ以上の反応性元素をさらに含む、請求項4に記載の方法。 - 第2の表面スラリーが、約10体積%〜約70体積%の固体含量を含む、請求項4に記載の方法。
- 緻密化された表面層が、保護セラミックコーティングよりも多量の残留ケイ素を含む、請求項4に記載の方法。
- 流動性プレセラミックポリマーを硬化させるステップが、約150℃〜約400℃の範囲の温度で加熱するステップを含み、
熱分解するステップが、複合層を約850℃〜約1300℃の範囲の温度に加熱するステップを含む、請求項1に記載の方法。 - 硬化させるステップが、圧力を加えるステップをさらに含む、請求項8に記載の方法。
- プレセラミックポリマーが、有機ケイ素ポリマー及び/又は無機ケイ素ポリマーを含む、請求項1に記載の方法。
- セラミックス基複合体が、炭化ケイ素マトリックスに埋め込まれた炭化ケイ素繊維を含み、
保護セラミックコーティングが、20体積%以下の残留ケイ素で炭化ケイ素を含む、請求項1に記載の方法。 - 保護セラミックコーティングを有するセラミックス基複合材料の製造方法であって、
粒子状物質を充填したセラミック繊維骨格を含む含浸繊維プリフォームの外表面上に第1の表面スラリーを塗布するステップであって、第1の表面スラリーが溶媒中に分散したセラミック固体粒子を含むステップ、
第1の表面スラリーを乾燥させてセラミック固体粒子を含む乾燥多孔質層を形成するステップ、
ケイ素を含む流動性プレセラミックポリマーを乾燥多孔質層に浸透させるステップ、
流動性プレセラミックポリマーを硬化させて複合層を外表面上に形成するステップであって、複合層が、セラミック固体粒子が分散された硬化したプレセラミックポリマーを含むステップ、
硬化したプレセラミックポリマーを熱分解して外表面上に炭化ケイ素を含む多孔質セラミック層を形成するステップ、
含浸繊維プリフォーム及びその外表面上の多孔質セラミック層にケイ素を含む溶融材料を浸透させるステップ、並びに
溶融材料による浸透後、溶融材料を冷却して、保護セラミックコーティングを上に有するセラミックス基複合体を形成するステップ
を含む方法。 - 流動性プレセラミックポリマーを硬化させるステップが、約150℃〜約400℃の範囲の温度で加熱するステップを含み、
熱分解するステップが、複合層を約850℃〜約1300℃の範囲の温度に加熱するステップを含む、請求項12に記載の方法。 - 硬化させるステップが、圧力を加えるステップをさらに含む、請求項13に記載の方法。
- プレセラミックポリマーが、有機ケイ素ポリマー及び/又は無機ケイ素ポリマーを含む、請求項12に記載の方法。
- 熱分解の後及び浸透の前に、
第2の表面スラリーを多孔質セラミック層上に塗布して熱分解中に形成されたクラックを埋めるステップであって、第2の表面スラリーが水性又は有機溶媒中に分散したセラミック粒子を含むステップ、及び
第2の表面スラリーを乾燥させて多孔質セラミック層上に表面層を形成するステップをさらに含み、
浸透及び冷却が、保護セラミックコーティング上に緻密化された表面層を形成するための表面層の浸透及び冷却を含む、請求項12に記載の方法。 - セラミック粒子が炭化ケイ素及び/又は窒化ケイ素を含み、
第2の表面スラリーが、グラファイト、ダイヤモンド、カーボンブラック、モリブデン及びタングステンからなる群から選択される、1つ以上の反応性元素をさらに含む、請求項16に記載の方法。 - 第2の表面スラリーが、約10体積%〜約70体積%の固体含量を含む、請求項16に記載の方法。
- 緻密化された表面層が、保護セラミックコーティングよりも多量の残留ケイ素を含む、請求項16に記載の方法。
- セラミックス基複合体が、炭化ケイ素マトリックスに埋め込まれた炭化ケイ素繊維を含み、
保護セラミックコーティングが、20体積%以下の残留ケイ素で炭化ケイ素を含む、請求項12に記載の方法。
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| KR20220056927A (ko) * | 2020-10-28 | 2022-05-09 | 고려대학교 산학협력단 | 3d 프린팅 기술에 의한 다중 스케일 기공 제어를 통한 다공성 세라믹 스캐폴드 제작 |
| KR102451756B1 (ko) * | 2020-10-28 | 2022-10-07 | 고려대학교 산학협력단 | 3d 프린팅 기술에 의한 다중 스케일 기공 제어를 통한 다공성 세라믹 스캐폴드 제작 |
| JP2023004113A (ja) * | 2021-06-25 | 2023-01-17 | 三菱重工業株式会社 | セラミックス基複合材の成形方法 |
| JP7629811B2 (ja) | 2021-06-25 | 2025-02-14 | 三菱重工業株式会社 | セラミックス基複合材の成形方法 |
| US12325667B2 (en) | 2021-06-25 | 2025-06-10 | Mitsubishi Heavy Industries, Ltd. | Processing method for ceramic-based composite material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6630770B6 (ja) | 2020-03-18 |
| US11787159B2 (en) | 2023-10-17 |
| JP6630770B2 (ja) | 2020-01-15 |
| EP3392034B1 (en) | 2020-11-25 |
| US11001532B2 (en) | 2021-05-11 |
| US20210230071A1 (en) | 2021-07-29 |
| US20180305263A1 (en) | 2018-10-25 |
| EP3392034A1 (en) | 2018-10-24 |
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