JP2019531996A - SiC複合材セラミックスの製造方法 - Google Patents
SiC複合材セラミックスの製造方法 Download PDFInfo
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- JP2019531996A JP2019531996A JP2019501544A JP2019501544A JP2019531996A JP 2019531996 A JP2019531996 A JP 2019531996A JP 2019501544 A JP2019501544 A JP 2019501544A JP 2019501544 A JP2019501544 A JP 2019501544A JP 2019531996 A JP2019531996 A JP 2019531996A
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Abstract
Description
本発明は、エネルギー省との契約第DE−NE0008222号の下で政府支援を受けてなされたものである。米国政府は、本発明に対して一定の権利を有している。
Claims (30)
- セラミック複合材構造体を製造する方法であって、
少なくとも1つの型体の外部表面(28)にセラミック繊維(22)の上被を施すステップであって、当該繊維上被は繊維(22)の間に空隙(24)を画定することを特徴とするステップと、
当該繊維上被を第1の温度以下の温度に加熱するステップと、
第1の容器(12)の中で、当該繊維上被の空隙(24)に当該セラミック複合材を浸透させるステップと、
浸透済みの当該繊維上被を、当該第1の容器(12)からそれとは別個の第2の容器(14)へ移送するステップと、
当該第2の容器(14)の中で、当該第1の温度より高い第2の温度で、浸透済みの当該繊維上被に当該セラミック複合材の被膜を施すステップと
から成る方法。 - 前記繊維上被を前記第1の温度から25℃以内の温度に加熱する、請求項1の方法。
- 前記繊維上被を加熱された容器の中で加熱する、請求項1の方法。
- 前記繊維上被を、ガスを前記第1の温度に加熱し、当該ガスを前記繊維上被の上に流すことによって加熱する、請求項1の方法。
- 前記繊維上被は、前記型体に隣接する内側部分および外側部分(26)を画定するに十分な厚さの断面を有する上被であり、
前記繊維上被に覆われた前記型体を加熱するステップをさらに含むことを特徴とする、請求項1の方法。 - 前記少なくとも1つの型体を、前記繊維上被の内側部分の温度が外側部分(26)の温度より高くなるように加熱する、請求項5の方法。
- 前記繊維上被の中に加熱素子(32)を挿入し、前記繊維上被の内側部分を外側部分(26)より高い温度に加熱することによって前記繊維を加熱する、請求項1の方法。
- 前記浸透ステップが、第1のキャリアガスに同伴される第1の前駆体ガスを前記第1の容器(12)に注入し、当該前駆体ガスおよび当該キャリアガスを前記繊維上被の上に流すことから成る、請求項1の方法。
- 前記前駆体ガスはメチルトリクロロシランであり、前記キャリアガスは水素である、請求項1の方法。
- 前記浸透ステップが、化学気相含浸、電気泳動蒸着およびそれらの組み合わせから成る群より選択される、請求項1の方法。
- 前記第1の温度が800℃〜1300℃の範囲内である、請求項1の方法。
- 前記第1の温度が1000℃〜1200℃の範囲内である、請求項1の方法。
- 前記浸透ステップの前に別個の容器内で界面被膜を施すステップをさらに含む、請求項1の方法。
- 浸透済みの前記繊維上被を前記第2の容器(14)へ移送する前記ステップが中間容器(16)へ移送する、請求項1の方法。
- 浸透済みの前記繊維上被を、前記中間容器(16)の中で、前記第1の温度より高い温度であって、最高で前記第2の温度に加熱する、請求項14の方法。
- 前記被膜形成ステップに先立って、浸透済みの前記繊維上被を前記第1の温度より高い温度であって、最高で前記第2の温度に均等に加熱するステップをさらに含む、請求項1の方法。
- 前記被膜形成ステップが、前記第2の容器(14)の壁(44)を冷却するステップと、
浸透済みの前記繊維上被の上に第2の前駆体ガスおよび第2のキャリアガスを流して、前記繊維上被の上に緻密で結晶質の被膜(34)を析出させることにより、被膜を施されたセラミック複合材構造体(20)を形成するステップとをさらに含むことを特徴とする、請求項16の方法。 - 前記前駆体ガスはメチルトリクロロシランであり、前記キャリアガスは水素であり、前記被膜(34)はSiCである、請求項17の方法。
- 前記被膜形成ステップが、前記第2の容器(14)の壁(44)を冷却するステップと、
第2の前駆体ガスおよびキャリアガスを前記第2の温度に加熱するステップと、
浸透済みの前記繊維上被の上に当該前駆体ガスおよび当該キャリアガスを流して、前記繊維上被の上に緻密で結晶質の被膜(34)を析出させることにより、被膜が施されたセラミック複合材構造体(20)を形成するステップとをさらに含むことを特徴とする、請求項1の方法。 - 前記前駆体ガスはメチルトリクロロシランであり、前記キャリアガスは水素であり、前記被膜はSiCである、請求項19の方法。
- 前記被膜形成プロセスの後に被膜付きの前記複合材構造体(20)を冷却する、請求項19の方法。
- 前記被膜形成ステップが化学蒸着プロセスを含む、請求項1の方法。
- 前記第2の温度が1200℃〜1800℃の範囲内である、請求項1の方法。
- 前記第2の温度が1300℃〜1500℃の範囲内である、請求項1の方法。
- 前記セラミック複合材がSiCである、請求項1の方法。
- セラミック繊維の上被を施す前記ステップが、前記型体の周りへのセラミック繊維(22)の編組みおよび巻回のうちから選択される、請求項1の方法。
- 繊維(22)の上被を施された複数の型体を一括処理するステップから成る、請求項1の方法。
- 前記型体が、前記浸透ステップの後に取り外される取外し可能な型体である、請求項1の方法。
- 前記型体が、前記繊維上被の内側部分を気密封止するSiC管である、請求項1の方法。
- 前記セラミック複合材構造体(20)は、SiCを均等に浸透させたSiC繊維上被(22)の外部表面(26)が緻密で結晶質のSiC被膜(34)で覆われた原子燃料棒である、請求項1の方法。
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