JP2017048103A - Max相化合物を含むセラミックマトリックス中に炭化ケイ素繊維を含有するセラミックマトリックス複合材料 - Google Patents
Max相化合物を含むセラミックマトリックス中に炭化ケイ素繊維を含有するセラミックマトリックス複合材料 Download PDFInfo
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- JP2017048103A JP2017048103A JP2016165253A JP2016165253A JP2017048103A JP 2017048103 A JP2017048103 A JP 2017048103A JP 2016165253 A JP2016165253 A JP 2016165253A JP 2016165253 A JP2016165253 A JP 2016165253A JP 2017048103 A JP2017048103 A JP 2017048103A
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Abstract
Description
(a) コーティングされた炭化ケイ素繊維を含む多孔質繊維プリフォームに、炭化ケイ素粒子と少なくとも1つのMAX相前駆体を含有する固体粒子状物質を含むスラリーを含浸させて、これにより含浸繊維プリフォームを形成するステップ;
(b) 上記含浸繊維プリフォームにケイ素を含む溶融物を含浸させるステップ;及び
(c) セラミックマトリックス中に炭化ケイ素繊維を含むセラミックマトリックス複合材料を形成するステップであって、上記セラミックマトリックスが、炭化ケイ素と化学組成Mn+1AXn (式中、Mは、Ti、V、Cr、Sc、Zr、Nb、Mo、Hf、及びTaからなる群から選択される遷移金属であり;Aは、Al、Si、P、S、Ga、Ge、As、Cd、In、Sn、Tl及びPbからなる群から選択されるA族元素であり、Xは炭素又は窒素であり、nは1〜3の整数である)を有するMAX相化合物とを含む、前記ステップ
を含む。
多孔質繊維プリフォームは、複数の二次元織炭化ケイ素繊維織物層の積層によって形成することができる。次いで、このプリフォームを、化学気相含浸法により、亀裂偏向繊維-マトリックス界面としての役割を果たす窒化ホウ素でコーティングし、その後炭化ケイ素で硬化させて、次の工程ステップ中にコーティングされた繊維を保護することができる。次に、多孔質繊維プリフォームを真空下に置いて任意の封入空気を除去し、さらに約15体積パーセントの炭化ケイ素、約5体積パーセントの水素化チタン、約35体積パーセントの炭化チタン、並びに残りの部分(水、分散剤、及び結合剤)からなる水性スラリーを、上記部材が完全に沈むまで導入し得る。部材が沈んだら、圧力を周囲圧力に戻して圧力勾配を与え、任意の封入空孔率をさらに低下させる。その後、部品取り外しの際のスラリー放出を防止するためには実質的に十分であるが、部品取り外し及び表面洗浄を容易にするためには依然として十分に柔軟であるようにスラリーの粘度が増加するまで、上記の部品を約80℃で乾燥させることができる。次いで、上記の部品を取り外し、表面を洗浄して過剰のスラリー蓄積を除去し、その後、上記部品を約150℃で乾燥させて、任意の残りの水分を除去することができる。スラリー含浸後、部品は約20%〜約60%の残留空孔率を含有する可能性があり、さらに約60重量パーセントのケイ素と約40重量パーセントのチタンを含有する溶融チタン-ケイ素合金に含浸させて、約5%未満の残留空孔率を有する高密度の複合材料を形成することができる。この高密度の複合材料は、炭化ケイ素と1つ以上のMAX相化合物を含有するセラミックマトリックス中に炭化ケイ素繊維を含有し得る。この実施例におけるMAX相化合物は、Ti3SiC2及び/又はTi4SiC3を包含し得る。
Claims (20)
- セラミックマトリックス複合材料であって、以下:
炭化ケイ素と化学組成Mn+1AXn
(式中、
Mは、Ti、V、Cr、Sc、Zr、Nb、Mo、Hf及びTaからなる群から選択され、
Aは、Al、Si、P、S、Ga、Ge、As、Cd、In、Sn、Tl及びPbからなる群から選択され、
Xは、炭素又は窒素であり、
nは、1〜3の整数である)
を有するMAX相化合物とを含有するセラミックマトリックス
を含み;且つ
該セラミックマトリックス中に連続炭化ケイ素繊維を含有する、
前記セラミックマトリックス複合材料。 - 前記MAX相化合物が、前記セラミックマトリックス中に少なくとも約30重量%の濃度で存在する、請求項1に記載のセラミックマトリックス複合材料。
- 前記MAX相化合物の濃度が、約60重量%〜約99重量%である、請求項2に記載のセラミックマトリックス複合材料。
- 前記MAX相化合物が、以下:Ti2CdC、Sc2InC、Ti2AlC、Ti2GaC、Ti2InC、Ti2TlC、V2AlC、V2GaC、Cr2GaC、Ti2AlN、Ti2GaN、Ti2InN、V2GaN、Cr2GaN、Ti2GeC、Ti2SnC、Ti2PbC、V2GeC、Cr2AlC、Cr2GeC、V2PC、V2AsC、Ti2SC、Zr2InC、Zr2TlC、Nb2AlC、Nb2GaC、Nb2InC、Mo2GaC、Zr2InN、Zr2TlN、Zr2SnC、Zr2PbC、Nb2SnC、Nb2PC、Nb2AsC、Zr2SC、Nb2SC、Hf2InC、Hf2TlC、Ta2AlC、Ta2GaC、Hf2SnC、Hf2PbC、Hf2SnN、Hf2SC、Ti3AlC2、V3AlC2、Ti3SiC2、Ti3GeC2、Ti3SnC2、Ta3AlC2、Ti4AlN3、V4AlC3、Ti4GaC3、Ti4SiC3、Ti4GeC3、Nb4AlC3、及びTa4AlC3からなる群から選択される、請求項1〜3のいずれか1項に記載のセラミックマトリックス複合材料。
- 前記MAX相化合物が、以下:Ti2AlC、Ti2AlN、Ti3SiC2、Ti4AlN3及びTi4SiC3からなる群から選択される、請求項4に記載のセラミックマトリックス複合材料。
- 前記炭化ケイ素が、前記セラミックマトリックス中に約60重量%以下の濃度で存在する、請求項1〜5のいずれか1項に記載のセラミックマトリックス複合材料。
- 前記炭化ケイ素の濃度が、約1重量%〜約40重量%である、請求項6に記載のセラミックマトリックス複合材料。
- 前記セラミックマトリックスが、ケイ化物をさらに含む、請求項1〜7のいずれか1項に記載のセラミックマトリックス複合材料。
- 前記ケイ化物が、ケイ化チタン、ケイ化バナジウム、ケイ化クロム、ケイ化スカンジウム、ケイ化ジルコニウム、ケイ化ニオブ、ケイ化モリブデン、ケイ化ハフニウム及びケイ化タンタルからなる群から選択される、請求項8に記載のセラミックマトリックス複合材料。
- 前記セラミックマトリックスが、約5重量%以下の未反応ケイ素を含む、請求項1〜9のいずれか1項に記載のセラミックマトリックス複合材料。
- 請求項1〜10のいずれか1項に記載のセラミックマトリックス複合材料を含む少なくとも1つの部材を含む、セラミックマトリックス複合材料(CMC)部品。
- 前記部材が、ブレードシールセグメント、ブレード、ベーン、及び燃焼器ライナーからなる群から選択される、請求項11に記載のCMC部品。
- セラミックマトリックス複合材料を作製する方法であって、該方法が、以下のステップ:
コーティングされた炭化ケイ素繊維を含む多孔質繊維プリフォームに、炭化ケイ素粒子と少なくとも1つのMAX相前駆体を含有する固体粒子状物質を含むスラリーを含浸させて、これにより含浸繊維プリフォームを形成するステップ;
該含浸繊維プリフォームにケイ素を含む溶融物を含浸させるステップ;及び
セラミックマトリックス中に炭化ケイ素繊維を含有するセラミックマトリックス複合材料を形成するステップであって、該セラミックマトリックスが、炭化ケイ素と化学組成Mn+1AXn (式中、Mは、Ti、V、Cr、Sc、Zr、Nb、Mo、Hf、及びTaからなる群から選択される遷移金属であり;Aは、Al、Si、P、S、Ga、Ge、As、Cd、In、Sn、Tl及びPbからなる群から選択されるA族元素であり、Xは炭素又は窒素であり、nは1〜3の整数である)を有するMAX相化合物とを含む、前記ステップ
を含む、前記方法。 - 前記溶融物がケイ素合金を含む、請求項13に記載の方法。
- 前記溶融物が前記遷移金属をさらに含む、請求項14に記載の方法。
- 前記溶融物が、前記A族元素をさらに含む、請求項14又は15に記載の方法。
- 前記溶融物が、前記ケイ素合金をその共晶組成で含む、請求項14〜16のいずれか1項に記載の方法。
- 前記溶融物が、ケイ素の融点未満の温度である、請求項14〜17のいずれか1項に記載の方法。
- 前記少なくとも1つのMAX相前駆体が、前記遷移金属を含む炭化物、窒化物又は水素化物を含む、請求項13〜18のいずれか1項に記載の方法。
- 前記少なくとも1つのMAX相前駆体が、前記A族元素を含む炭化物、窒化物又は水素化物を含む、請求項13〜19のいずれか1項に記載の方法。
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JP6929622B2 (ja) | 2021-09-01 |
EP3138829A1 (en) | 2017-03-08 |
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CA2939288A1 (en) | 2017-02-28 |
US9856176B2 (en) | 2018-01-02 |
US20170057879A1 (en) | 2017-03-02 |
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