JP2022501509A - 加圧焼結によりプリフォームから複雑な形を有する部品を製造する方法 - Google Patents
加圧焼結によりプリフォームから複雑な形を有する部品を製造する方法 Download PDFInfo
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- JP2022501509A JP2022501509A JP2021516748A JP2021516748A JP2022501509A JP 2022501509 A JP2022501509 A JP 2022501509A JP 2021516748 A JP2021516748 A JP 2021516748A JP 2021516748 A JP2021516748 A JP 2021516748A JP 2022501509 A JP2022501509 A JP 2022501509A
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Abstract
Description
・犠牲材は、セラミック、シリカ、金属珪酸塩、複合材から選択される材料である。
・セラミックは、粉末状のYSZ(イットリア安定化ジルコニア)、ATZ(アルミナ強化ジルコニア)、ZTA(ジルコニア強化アルミナ)、40%〜80%の範囲の高密度化度合を発揮するアルミナから選択され得る。
・プリフォームと犠牲材との間で反応が起こることを防ぐ目的で、成形型にプリフォームを入れる前に、プリフォームの少なくとも一面に、界面層を配置し得る。
・プリフォーム、界面層、そして犠牲材の材料は、焼結開始・終了時の温度において同様の高密度化挙動を示す。
Claims (15)
- 3Dアディティブプリントおよび加圧焼結の技術を活用した連続層堆積によって、複雑な形を有する部品(3;8)を製造する方法であって、
金属合金、セラミック、複合材、及び、溶失材をベースとした多孔性材料あるいは粉末材料から選択される材料より、デジタル制御により実施される三次元(3D)アディティブプリント法を活用して、堆積された連続層の生成によって、型(1;4)を作製する工程と、
高密度化対象となる多孔あるいは粉末状の材料を、前記成形型(1;4)で成形することによって得たプリフォーム(1;6)を、成形型(2)に入れる工程と、を備え、
前記成形型(2)は、前記プリフォーム(1;6)に加え、多孔性あるいは粉末状の犠牲材(13;9)で満たされ、前記成形型(2)を一軸高密度化加圧焼結(10)し、最終的に成形型(2)から取り出すことで、部品(3;8)が完成する、ことを特徴とする製造方法。 - 前記3Dアディティブプリント法は、ステレオリソグラフィ、バインダジェット、制御押出成形、融合フィラメント加工、インクジェットプリント、及び、エアロゾルジェットプリントから選択される、ことを特徴とする請求項1に記載の製造方法。
- 前記成形型(2)への投入前に、境界層(11;7)が前記プリフォームの少なくとも一面(1i、1e;5i、5e)上に配置される、ことを特徴とする請求項1または2に記載の製造方法。
- 前記プリフォーム、前記境界層、及び、前記犠牲材の材料は、焼結開始・終了時の温度で、同様の高密度化挙動を示す、ことを特徴とする請求項3に記載の製造方法。
- 前記犠牲材(13;9)は、セラミック、シリカ、金属珪酸塩、複合材から選択される、ことを特徴とする請求項1〜4のいずれか一項に記載の製造方法。
- 前記セラミックは、YSZ、ATZ、ZTA、40%〜80%の範囲の高密度化度合を発揮するアルミナから選択される、ことを特徴とする請求項5に記載の製造方法。
- グラファイト、酸化イットリウム、及び、窒化ホウ素から選択される材料からなる層によって、前記界面層を形成する、ことを特徴とする請求項3または4に記載の製造方法。
- 前記境界層(11;7)は、吹き付け、粉末積層、および適切な形状を有するシートの形で付与される、ことを特徴とする請求項3または4に記載の製造方法。
- 製造部品の金属合金は、チタン合金、ステンレススチール、及び、レネ系に属するニッケル系超合金から選択される、ことを特徴とする請求項1〜8のいずれか一項に記載の製造方法。
- 3Dアディティブプリント実行時、200℃〜600℃の温度、かつ、0.1℃/分〜1℃/分の温度上昇率で熱処理を行うことによって、前記プリフォーム(1;6)からバインダを取り出す工程を実施する、ことを特徴とする請求項1〜9のいずれか一項に記載の製造方法。
- バインダを取り出す前記工程に続いて、600℃〜1,500℃の温度で、前記プリフォーム(1;6)を熱処理する予備焼結工程を実施する、ことを特徴とする請求項10に記載の製造方法。
- 多孔性あるいは粉末状の材料からなる前記成形型(1)は、高密度化前に、前記プリフォームを作製し、
前記プリフォーム(1)を投入する前後に、前記成形型(2)を、多孔性又は粉末状の犠牲材(13)で満たす、ことを特徴とする請求項1〜11のいずれか一項に記載の製造方法。 - アディティブプリントにより、前記成形型(4)が失材から作製され、多孔性あるいは粉末状の材料からなる対向面(5)が、前記成形型(4)の周囲に形成され、
前記失材が除去されると、加圧焼結用の前記成形型(2)に投入される前に、前記対向面(5)が、前記成形型(4)に合わせて前記プリフォーム(6)を構成する、高密度化される材料で満たされ、
前記犠牲材(9)が前記成形型(2)に追加され、
前記加圧焼結(10)後、前記部品(8)が前記対向面(5)から取り出される、ことを特徴とする請求項1〜11のいずれか一項に記載の製造方法。 - 前記対向面(5)の材料は、セラミック、シリカ、金属珪酸塩、及び、複合材から選択され、
前記材料は、前記プリフォーム(1;6)、前記犠牲材(13;9)、及び、前記境界層(7)の材料と同様に、焼結開始・終了時の温度で、同様の高密度化挙動を示す、ことを特徴とする請求項13に記載の製造方法。 - 前記セラミックは、YSZ、ATZ、ZTA、及び、40%〜80%の範囲の高密度化度合を発揮するアルミナから選択される、ことを特徴とする請求項14に記載の製造方法。
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PCT/EP2019/076550 WO2020070107A1 (fr) | 2018-10-02 | 2019-10-01 | Procédé de fabrication de pièce de forme complexe par frittage sous pression à partir d'une préforme |
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FR3115280B1 (fr) * | 2020-10-20 | 2023-07-21 | Safran Ceram | Procédé de fabrication d’une pièce creuse en matériau composite à matrice métallique ou céramique renforcée avec des fibres courtes |
US11759860B2 (en) | 2020-11-09 | 2023-09-19 | General Electric Company | Systems and methods for compensating a geometry of a green body part based on sintering-induced distortion |
CN112589094B (zh) * | 2020-12-11 | 2022-04-22 | 西安交通大学 | 一种重力浸渗复合衬板的高通量制备方法 |
CN112809004B (zh) * | 2020-12-18 | 2022-12-30 | 广东省科学院新材料研究所 | 多孔功能结构及其制备方法 |
FR3120320A1 (fr) | 2021-03-02 | 2022-09-09 | Sintermat | PROCEDE DE FABRICATION D’UNE PIECE PRES-DES-COTES (Near Net Shape ou NNS) DE FORME COMPLEXE PAR FRITTAGE SOUS CHARGE |
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