JP2016222884A - 異なるセラミック構成要素の結合 - Google Patents
異なるセラミック構成要素の結合 Download PDFInfo
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Abstract
【解決手段】第1の熱膨張係数を有する第1の構成要素と、第二の熱膨張係数とは異なる第2熱膨張係数を有する第2の構成要素とを互いに結合させる接着剤であってフラクシング剤、低フラックス材料、およびフィラー材料を用いて処方され、フィラー材料は、互いに結合される2つの構成要素の少なくとも1つと同じ化学組成を有する粒子状物質を含む接着剤18。フラクシング剤がメタホウ酸を含むことが望ましく、低フラックス材料が酸化ジルコニウムを含むことが好ましい接着剤。接着剤の一部として、接着剤の付与及び所定の結合厚みの実現を補助するために、水及び増粘剤を使用することもできる接着剤。前記接着剤を用いて高強度の結合を形成する方法は、中間層の使用、または互いに結合される構成要素の1つまたは両方を損傷させ得る高い硬化温度の使用を必要としない。
【選択図】図1
Description
実験室用に寸法を与えられた2つの異なる基材材料のサンプルが、以下の手順を用いて互いに結合された。メタホウ酸リチウム、酸化ジルコニウム、およびフリットは、粉末化された成分の粒子径をさらに減少して均一な寸法とし均一な混合物を実現するために、ベンチ乳鉢および乳棒を用いて粉砕された。湿らせる目的で、かつ表面を加水分解するために、粉砕された粉末への滴下により少量の脱イオン水が加えられた。MethocelTMが、増粘剤として、所望の結合部を実現するように、得られる接着剤混合物の粘度を調整するために、湿った粉末配合物に加えられた。接着剤は、以下の組成を有する:メタホウ酸リチウム 55.6wt%、酸化ジルコニウム 5.6wt%、フリット(Viox 2936) 38.9wt%、脱イオン水および所望の粘度を実現するためのMethocelTM。
12 接着表面
14 第2のセラミック構成要素
16 接着表面
18 接着剤層
20 厚み
22 表面
24 表面
26 結合
50 矢印
Claims (23)
- 第1の熱膨張係数を有するセラミックを含む第1の構成要素と、第1の熱膨張係数とは異なる第2の熱膨張係数を有するセラミックを含む第2の構成要素とを互いに結合するのに使用するための接着剤であって、
(a)第1の構成要素と同じ化学組成を有する粒子状物質、
(b)フラクシング剤、
(c)低フラックス材料、を含み、
第1および第2の構成要素の結合表面と接触している接着剤層に対して熱を与えることにより、少なくとも1つの結合表面に化学組成の変化を起こし、第1の構成要素と第2の構成要素との間に形成された結合をもたらすことを特徴とする、接着剤。 - フラクシング剤が、メタホウ酸リチウムを含む、請求項1に記載の接着剤。
- 低フラックス材料が、酸化ジルコニウムを含む、請求項1に記載の接着剤。
- 水および増粘剤をさらに含む、請求項1に記載の接着剤。
- 増粘剤が、化学的に改質されたセルロースをさらに含む、請求項4に記載の接着剤。
- 粒子状物質が、第2の構成要素と同じ化学組成を有する粒子をさらに含む、請求項1に記載の接着剤。
- 第1および第2の構成要素の間に形成された結合が、第1および第2の構成要素の間に熱膨張係数遷移領域を形成する、請求項1に記載の接着剤。
- 接着剤の粒子状物質の重量パーセントが、第1の構成要素の熱膨張係数と第2の構成要素の熱膨張係数との間の差異によって決定される、請求項1に記載の接着剤。
- (a)結合層を形成するために、第1のセラミック構成要素の第1の結合表面および第2のセラミック構成要素の第2の結合表面の1つまたは両方に接着剤を付ける段階、
ここで、第1のセラミック構成要素が、第2のセラミック構成要素の熱膨張係数とは異なる熱膨張係数を有し、接着剤が以下を含む:
(i)第1または第2の構成要素の1つと同じ組成を有する粒子状物質、
(ii)フラクシング剤、
(iii)低フラックス材料、
(b)第1および第2の結合表面を結合層で接合する段階、
(c)接着された複合材料を形成するために、接着剤の層に垂直な方向で、第1および第2の構成要素の1つまたは両方に圧力を与える段階、
(d)第1および第2の構成要素の間に結合を形成するために、接着された複合材料を加熱する段階、
ここで、接着剤の層は、加熱の間、第1および第2の結合表面の少なくとも1つに化学組成の変化を起こす、
を含む、セラミック材料を接合する方法。 - 接着された複合材料が、少なくとも約2,000°Fの温度に加熱され、少なくとも約30分間その温度で保持される、請求項9に記載の方法。
- 接着剤が、水、化学的に改質されたセルロース増粘剤、メタホウ酸リチウム、および酸化ジルコニウム、および第1の構成要素と同じ組成を有する粒子状物質を共に混合することによって処方される、請求項9に記載の方法。
- 第1の熱膨張係数を有するセラミックを含む第1の構成要素、第1の熱膨張係数とは異なる第2の熱膨張係数を有するセラミックを含む第2の構成要素、を含み、
形成された結合が第1および第2の構成要素を互いに接着し、形成された結合は接着剤の熱処理によってもたらされ、接着剤は以下を含み、
(i)第1の構成要素と同じ化学組成を有する粒子状物質、
(ii)フラクシング剤、
(iii)低フラックス材料、
接着剤が、接着剤を加熱することで、第1または第2の構成要素の少なくとも1つの結合表面に化学組成の変化を起こすことを特徴とする、複合材料オブジェクト。 - 第1および第2の構成要素の間に形成された結合が、第1および第2の構成要素の間に熱膨張係数遷移領域を形成する、請求項12に記載の複合材料。
- 接着剤の粒子状物質の重量パーセントが、第1の構成要素の熱膨張係数と第2の構成要素の熱膨張係数との間の差異によって決定される、請求項12に記載の接着剤。
- 接着剤の粘度が、化学的に改質されたセルロースおよび水を接着剤に加えることによって調整される、請求項9に記載の方法。
- 接着された複合材料が、ほぼ周囲室温から約800°Fの温度に加熱され、その後加熱段階(d)の前に、グリーン結合層を形成するために冷却を許容される、請求項9に記載の方法。
- 接着剤が、第1の構成要素と同じ化学組成を有する粒子状物質を約20wt%から約75wt%、約25wt%から約80wt%のフラクシング剤、および約20wt%から約75wt%の低フラクシング剤を含む、請求項12に記載の複合材料オブジェクト。
- 第1の構成要素と同じ組成を有する粒子状物質が、約200メッシュから約325メッシュの粒子径を有する、請求項12に記載の複合材料オブジェクト。
- 第1の構成要素または第2の構成要素の少なくとも1つの結合表面の化学組成の変化が、遷移化学勾配の形成である、請求項12に記載の複合材料オブジェクト。
- 接着剤の加熱が、第1の構成要素の結合表面および第2の構成要素の結合表面のどちらかに化学組成の変化を引き起こす、請求項12に記載の複合材料オブジェクト。
- フラクシング剤が、メタホウ酸リチウム、炭酸ナトリウム、炭化ホウ素、高ホウ素ガラス、石灰、およびアルカリアッシュの1つまたは複数から選択される、請求項1に記載の接着剤。
- 第1の構成要素および第2の構成要素が、セラミックマトリックス複合材料、セラミック繊維で強化されたセラミック、および金属マトリックスセラミックの1つ以上から選択される、請求項1に記載の接着剤。
- 低フラックス材料が、酸化ジルコニウム、窒化ケイ素、炭化ケイ素、アルミン酸塩、ケイ酸塩、アルミノ珪酸塩、チタン酸塩、およびジルコン酸塩の1つまたは複数から選択される、請求項1に記載の接着剤。
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