JP7046548B2 - カーボンナノチューブ及びグラフェンを用いたセラミックマトリックス複合材の製作 - Google Patents
カーボンナノチューブ及びグラフェンを用いたセラミックマトリックス複合材の製作 Download PDFInfo
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Description
セラミックマトリクス複合構造体を形成する方法であって、
カーボンナノチューブ、グラフェン、及びシリコン炭窒化物の混合物を提供することと、
前記カーボンナノチューブと前記グラフェンを結合するために前記混合物を加熱することと、
前記混合物内の前記シリコン炭窒化物を焼結することと
を含む方法。
前記カーボンナノチューブと前記グラフェンとの間の化学結合を開始するために前記混合物を第1の温度まで加熱することと、
1000℃未満の温度で前記混合物内の前記シリコン炭窒化物の前記焼結を引き起すために、第2の温度で前記混合物を加熱している間に前記混合物を加圧することと、
をさらに含む、条項1に記載の方法。
前記第1の温度が、750℃と950℃との間であり、
前記第2の温度が、前記第1の温度より高く、
前記カーボンナノチューブと前記グラフェンとの間の前記化学結合を開始するために、前記混合物内の前記シリコン炭窒化物の前記焼結が、前記第1の温度までの前記加熱の後に起き、
他の状況では1000℃以上で起きる前記グラフェンの酸化及びグラファイトの形成を防ぐために、前記混合物の前記加圧が、297psiから376psiの間の圧力範囲内で起きる、条項2に記載の方法。
前記カーボンナノチューブと前記グラフェンとの間の前記化学結合を支持するために、窒素、窒素/アルゴン、又はNaClのうちの少なくとも1つを前記混合物に加えるオートクレーブ内で前記混合物を加圧することをさらに含む、条項2に記載の方法。
分散液を形成するために前記混合物のための懸濁液を供給することと、
前記分散液を混合することと、
前記分散液をモールドの中に注ぎ込むことと、
成形体を形成するために前記モールドを熱間プレスすることと
をさらに含む、条項2に記載の方法。
ターブラのシェーカー・ミキサー及び超音波プローブを用いて前記分散液を混合することと、
前記成形体を形成するために、約1atmの加えられた窒素を用いて、約5000psi及び250℃で前記モールドを熱間プレスすることと
をさらに含み、前記懸濁液は、約10重量%がPS4及びエタノールである、条項5に記載の方法。
1から16時間にわたって1から14℃の割合で前記成形体を加熱することと、
前記セラミックマトリクス複合構造体を形成するために、3から8時間にわたって前記成形体のための一定最高温度を維持することと
をさらに含む、請求項5に記載の方法。
航空機の複合外板として前記セラミックマトリクス複合構造体を取り付けること
をさらに含む、条項7に記載の方法。
前記カーボンナノチューブが、0.5ミリメートルから4ミリメートルの間の長さ及び1ナノメートルから50ナノメートルの間の直径を有する単層カーボンナノチューブを含み、前記カーボンナノチューブが、前記混合物内の10から30重量%の範囲内であり、
前記グラフェンが、プレートレットの大きさが6から8nmの厚さ及び5から25ミクロンの幅であるナノグラフェンプレートレットを含み、前記グラフェンが、前記混合物内の10から30重量%の範囲内であり、
前記シリコン炭窒化物が、直径が0.1から1マイクロメータ―の間の粒径を有する粉末を含み、前記シリコン炭窒化物が、60から80重量%の範囲内であり、且つ
前記混合物内の前記カーボンナノチューブ及び前記グラフェンの組み合わされた重量が、40重量%未満である、条項1に記載の方法。
カーボンナノチューブ、
前記カーボンナノチューブに化学結合されたグラフェン、及び
前記カーボンナノチューブ及び前記グラフェンと共に混合物内で焼結されたシリコン炭窒化物
を含む、セラミックマトリックス複合材料。
約20重量%の前記カーボンナノチューブ、
約20重量%の前記グラフェン、及び
約60重量%の粉末形態の前記シリコン炭窒化物
を含む、条項10に記載のセラミックマトリックス複合材料。
10から30重量%の範囲内の前記カーボンナノチューブ、
10から30重量%の範囲内の前記グラフェン、及び
60から80重量%の範囲内の粉末形態の前記シリコン炭窒化物
を含み、前記混合物内の前記カーボンナノチューブ及び前記グラフェンの組み合わされた重量が、40重量%未満である、条項10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複合材料が、約2.1g/cm3であり、
前記カーボンナノチューブが、約0.42g/cm3であり、
前記グラフェンが、約0.42g/cm3であり、且つ
前記シリコン炭窒化物が、約1.26g/cm3である、条項10に記載のセラミックマトリックス複合材料。
約0.21g/cm3から約0.63g/cm3の範囲内の前記カーボンナノチューブ、
約0.21g/cm3から約0.63g/cm3の範囲内の前記グラフェン、及び
約1.26g/cm3から約1.68g/cm3の範囲内の前記シリコン炭窒化物
を含み、前記カーボンナノチューブ及び前記グラフェンの組み合わされた重量が、40重量%未満である、条項10に記載のセラミックマトリックス複合材料。
前記カーボンナノチューブが、0.5ミリメートルから4ミリメートルの間の長さ及び1ナノメートルから50ナノメートルの間の直径を有する単層カーボンナノチューブを含む、条項10に記載のセラミックマトリックス複合材料。
前記グラフェンが、プレートレットの大きさが6から8nmの厚さ及び5から25ミクロンの幅であるナノグラフェンプレートレットを含む、条項10に記載のセラミックマトリックス複合材料。
焼結の前、前記シリコン炭窒化物が、直径が0.1から1マイクロメータ―の間の粒径を有する粉末を含む、条項10に記載のセラミックマトリックス複合材料。
前記カーボンナノチューブ及び前記グラフェンが、750℃と950℃との間の第1の温度で化学結合される、条項10に記載のセラミックマトリックス複合材料。
前記シリコン炭窒化物が、前記第1の温度よりも高い第2の温度で焼結される、条項18に記載のセラミックマトリックス複合材料。
前記シリコン炭窒化物が、297psiと376psiとの間の圧力で焼結される、条項19に記載のセラミックマトリックス複合材料。
Claims (10)
- セラミックマトリクス複合構造体を形成する方法であって、
カーボンナノチューブ、グラフェン、及びシリコン炭窒化物の混合物を提供することと、
前記カーボンナノチューブと前記グラフェンを結合するために前記混合物を加熱することと、
前記混合物内の前記シリコン炭窒化物を焼結することと
を含む方法。 - 前記カーボンナノチューブと前記グラフェンとの間の化学結合を開始するために前記混合物を第1の温度まで加熱することと、
1000℃未満の温度で前記混合物内の前記シリコン炭窒化物の前記焼結を引き起こすために、第2の温度で前記混合物を加熱している間に前記混合物を加圧することと、
をさらに含む、請求項1に記載の方法。 - 前記第1の温度が、750℃と950℃との間であり、
前記第2の温度が、前記第1の温度より高く、
前記カーボンナノチューブと前記グラフェンとの間の前記化学結合を開始するために、前記混合物内の前記シリコン炭窒化物の前記焼結が、前記第1の温度までの前記加熱の後に起き、
他の状況では1000℃以上で起きる前記グラフェンの酸化及びグラファイトの形成を防ぐために、前記混合物の前記加圧が、297psi(2048 kPa) から376psi(2592 kPa)の間の圧力範囲内で起きる、請求項2に記載の方法。 - 前記カーボンナノチューブと前記グラフェンとの間の前記化学結合を維持するために、窒素又は窒素/アルゴンのうちの少なくとも1つを前記混合物に加えるオートクレーブ内で前記混合物を加圧することをさらに含む、請求項2に記載の方法。
- 分散液を形成するために前記混合物のための懸濁液を供給することと、
前記分散液を混合することと、
前記分散液をモールドの中に注ぎ込むことと、
成形体を形成するために前記モールドを熱間プレスすることと
をさらに含む、請求項2に記載の方法。 - ターブラのシェーカー・ミキサー及び超音波プローブを用いて前記分散液を混合することと、
前記成形体を形成するために、約1atmの加えられた窒素を用いて、約5000psi(34,474 kPa)及び250℃で前記モールドを熱間プレスすることと
をさらに含み、前記懸濁液は、約10重量%がPS4及びエタノールである、請求項5に記載の方法。 - 1~16時間にわたって1時間当たり1から14℃の割合で前記成形体を加熱することと、
前記セラミックマトリクス複合構造体を形成するために、3~8時間にわたって前記成形体のための一定最高温度を維持することと
をさらに含む、請求項5に記載の方法。 - 航空機の複合外板として前記セラミックマトリクス複合構造体を取り付けること
をさらに含む、請求項7に記載の方法。 - 前記カーボンナノチューブが、0.5ミリメートルから4ミリメートルの間の長さ及び1ナノメートルから50ナノメートルの間の直径を有する単層カーボンナノチューブを含み、前記カーボンナノチューブが、前記混合物内の10から30重量%の範囲内であり、
前記グラフェンが、プレートレットの大きさが6から8nmの厚さ及び5から25ミクロンの幅であるナノグラフェンプレートレットを含み、前記グラフェンが、前記混合物内の10から30重量%の範囲内であり、
前記シリコン炭窒化物が、直径が0.1から1マイクロメータ―の間の粒径を有する粉末を含み、前記シリコン炭窒化物が、60から80重量%の範囲内であり、且つ
前記混合物内の前記カーボンナノチューブ及び前記グラフェンの組み合わされた重量が、40重量%未満である、請求項1に記載の方法。 - カーボンナノチューブ、
前記カーボンナノチューブに化学結合されたグラフェン、及び
前記カーボンナノチューブ及び前記グラフェンと共に混合物内で焼結されたシリコン炭窒化物
を含む、セラミックマトリクス複合材料。
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