JP7071009B2 - 犠牲繊維および非湿潤塗膜を使用してセラミック基質複合材料を形成する方法 - Google Patents
犠牲繊維および非湿潤塗膜を使用してセラミック基質複合材料を形成する方法 Download PDFInfo
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- JP7071009B2 JP7071009B2 JP2020210198A JP2020210198A JP7071009B2 JP 7071009 B2 JP7071009 B2 JP 7071009B2 JP 2020210198 A JP2020210198 A JP 2020210198A JP 2020210198 A JP2020210198 A JP 2020210198A JP 7071009 B2 JP7071009 B2 JP 7071009B2
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Description
窒化ホウ素などの非湿潤塗膜を、非湿潤塗膜を通して繊維を引きずることによってナイロン繊維(直径8ミル(203μm))の上に配置した。塗膜されたナイロン繊維は、50ミル(1.27mm)間隔でプリプレグセラミックテープに巻きつけた。テープを切断し、0°/90°構成のパネルに重ねた。パネルは、溶媒を除去するために、加熱し、圧縮した。次いで、ナイロン繊維を分解してパネルを横断する細長いチャネルを形成するために、パネルを熱分解させた。熱分解するステップの間、非湿潤塗膜は、形成される細長いチャネルの内面の上に留まる。次いで、溶融ケイ素の溶解浸透を使用してパネルに浸透させた。非湿潤溶液は、溶融ケイ素が細長いチャネルの内部に堆積することを防止する。溶融ケイ素の一部分が反応して、セラミック基質を形成した。図14は、本明細書で開示する方法によってその中に形成された、CMC製品100の断面の一部を示し、かつ複数の細長いチャネル24、より具体的には冷却チャネル36を示す概略図である。
塗膜レイヤのうちの少なくとも1つが非湿潤塗膜である1つまたは複数の塗膜レイヤを1つまたは複数の犠牲繊維の上に堆積させて、1つまたは複数の塗膜された犠牲繊維を形成するステップと、
基質前駆体、複数の強化用繊維、および前記1つまたは複数の塗膜された犠牲繊維を含むCMCプレフォームを形成するステップと、
1つまたは複数の機能的形体が前記CMCプレフォームに沿って形成されるように前記1つまたは複数の犠牲繊維を除去することであって、前記非湿潤塗膜が前記1つまたは複数の機能的形体の上に留まるように前記1つまたは複数の犠牲繊維を除去することを含む、除去すること、または
流体溶浸材を前記CMCプレフォームに塗布し、それにより前記CMCプレフォームを高密度化すること
のうちの一方を実行するステップと、
1つまたは複数の機能的形体が前記CMCプレフォームに沿って形成されるように前記1つまたは複数の犠牲繊維を除去することであって、前記非湿潤塗膜が前記1つまたは複数の機能的形体の上に留まるように前記1つまたは複数の犠牲繊維を除去することを含む、除去すること、または
流体溶浸材を前記CMCプレフォームに塗布し、それにより前記CMCプレフォームを高密度化すること
のうちの他方を実行するステップとを含み、
前記非湿潤塗膜が、溶解浸透の間に、前記流体溶浸材が前記1つまたは複数の機能的形体に流れてその上に堆積するのを阻止するように適応される、方法。
前記CMCプレフォームを加熱して、前記犠牲繊維を分解するステップを含み、
前記1つまたは複数の犠牲繊維が、約200℃~約700℃の分解温度を有する材料から形成される、任意の前項に記載の方法。
前記CMCプレフォームを加熱して、前記1つまたは複数の犠牲ポリマー塗膜を分解するステップと、
前記1つまたは複数の犠牲繊維を抽出するステップとを含む、任意の前項に記載の方法。
塗膜レイヤのうちの少なくとも1つが非湿潤塗膜である1つまたは複数の塗膜レイヤを1つまたは複数の犠牲繊維の上に堆積させるステップと、
基質前駆体、複数のセラミック強化用繊維、および前記1つまたは複数の塗膜された犠牲繊維を含むCMCプレフォームを形成するステップと、
1つまたは複数の細長いチャネルが前記CMCプレフォームに沿って形成されるように前記1つまたは複数の犠牲繊維を除去するステップであって、前記非湿潤塗膜が前記1つまたは複数の細長いチャネルの内面の上に留まるように前記1つまたは複数の犠牲繊維を除去することを含む、ステップと、
流体溶浸材を前記CMCプレフォームに塗布し、それにより前記CMCプレフォームを高密度化して前記CMC製品を形成するステップとを含み、
前記非湿潤塗膜が、溶解浸透の間に、前記流体溶浸材が前記1つまたは複数の細長いチャネルに流れて堆積するのを阻止するように適応される、方法。
前記CMCプレフォームを加熱して、前記1つまたは複数の犠牲繊維を分解するステップを含み、
前記1つまたは複数の犠牲繊維が、約200℃~約650℃の分解温度を有する材料から形成される、任意の前項に記載の方法。
基質前駆体、複数のセラミック強化用繊維、および犠牲繊維の上に堆積された窒化ホウ素(BN)から成る塗膜を有する1つまたは複数の犠牲繊維を含むCMCプレフォームを形成するステップであって、前記1つまたは複数の犠牲繊維が、約10μm~1000μmの平均直径を有し、前記CMCプレフォームを形成することが、前記1つまたは複数の犠牲繊維を織りパターンまたは不織パターンのうちの一方に形成することを含む、ステップと、
細長いチャネルが前記CMCプレフォームに沿って形成されるように前記1つまたは複数の犠牲繊維を除去するステップであって、前記塗膜が前記細長いチャネルの内面の上に留まるように前記1つまたは複数の犠牲繊維を除去することを含む、ステップと、
ケイ素またはケイ素合金のうちの一方から成る溶解溶浸材を前記CMCプレフォームに塗布し、それにより前記CMCプレフォームを高密度化して前記CMC製品を形成するステップとを含み、
前記塗膜が、前記溶解溶浸材を前記塗布する間に、前記溶解溶浸材が前記1つまたは複数の細長いチャネルの各々の中に形成された空洞に流れてその上に堆積するのを阻止するように適応される、方法。
12 犠牲繊維
14 非湿潤塗膜
15 犠牲ポリマー塗膜
16 塗膜された犠牲繊維
18 強化用繊維
20 スラリー
22 基質前駆体材料
24 チャネル
26 内面
28 気孔
30 溶浸材
32 浸透された基質
34 セラミック基質材料
36 冷却チャネル
38 空洞
100 CMC製品
102 塗膜された犠牲繊維(図11、図12より推定)
200 CMC製品
210 CMCプレフォーム
Claims (10)
- セラミック基質複合材料(CMC)製品(100、200)を形成する方法(300)であって、
塗膜レイヤのうちの少なくとも1つが非湿潤塗膜(14)である1つまたは複数の塗膜レイヤ(14、15)を1つまたは複数の犠牲繊維(12)の上に堆積させて、1つまたは複数の塗膜された犠牲繊維(16)を形成するステップ(302)と、
基質前駆体(22)、複数の強化用繊維(18)、および前記1つまたは複数の塗膜された犠牲繊維(16)を含むCMCプレフォーム(10、210)を形成するステップ(304)と、
1つまたは複数の機能的形体(24)が前記CMCプレフォーム(10、210)に沿って形成されるように前記1つまたは複数の犠牲繊維(16)を除去するステップ(310)であって、前記非湿潤塗膜(14)が前記1つまたは複数の機能的形体(24)の上に留まるように前記1つまたは複数の犠牲繊維(16)を除去するステップを含む、除去するステップ(310)と、
流体溶浸材(30)を前記CMCプレフォーム(10、210)に塗布し(312)、それにより前記CMCプレフォーム(10、210)を高密度化するステップと、
をこの順で含み、
前記非湿潤塗膜(14)が、溶解浸透の間に、前記流体溶浸材(30)が前記1つまたは複数の機能的形体(24)に流れてその上に堆積するのを阻止するように適応される、方法。 - 前記1つまたは複数の機能的形体(24)が細長いチャネル(24)である、請求項1に記載の方法(300)。
- 前記1つまたは複数の細長いチャネル(24)が、冷却流体流チャネル(36)である、請求項2に記載の方法(300)。
- 前記1つまたは複数の犠牲繊維(16)を除去するステップが、
前記CMCプレフォーム(10、210)を加熱して、前記犠牲繊維(16)を分解するステップを含み、
前記1つまたは複数の犠牲繊維(16)が、200℃~700℃の分解温度を有する材料から形成される、請求項1に記載の方法(300)。 - 前記1つまたは複数の塗膜レイヤが、1つまたは複数の犠牲ポリマー塗膜(15)および前記非湿潤塗膜(14)を含む、請求項1に記載の方法(300)。
- 前記1つまたは複数の犠牲繊維(16)を除去するステップが、
前記CMCプレフォーム(10、210)を加熱して、前記1つまたは複数の犠牲ポリマー塗膜を分解するステップと、
前記1つまたは複数の犠牲繊維(16)を抜き出すステップとを含む、請求項5に記載の方法(300)。 - 前記非湿潤塗膜(14)を前記1つまたは複数の犠牲繊維(16)に前記塗布するステップが、溶浸材ストップオフ材料を塗装、噴霧、堆積、浸漬、またはスパッタリングするステップを含む、請求項1に記載の方法(300)。
- 前記非湿潤塗膜(14)が、二酸化ケイ素(SiO2)、三酸化ホウ素(B2O3)及び酸化アルミニウム(Al2O3)から成る群から選択された1つまたは複数の材料を含む、請求項1に記載の方法(300)。
- 前記方法(300)が、乾式エッチングプロセス、酸化プロセス、湿式エッチングプロセス、機械的表皮剥脱、または化学エッチングプロセスを使用して前記非湿潤塗膜(14)を除去するステップをさらに含む、請求項1に記載の方法(300)。
- 前記1つまたは複数の塗膜された犠牲繊維(16)が、(i)前記流体溶浸材(30)を前記CMCプレフォーム(10、210)に塗布する前の熱分解、(ii)前記流体溶浸材を前記CMCプレフォーム(10、210)に塗布する前の溶解、(iii)前記流体溶浸材(30)を前記CMCプレフォーム(10、210)に塗布する前の物理的な抜き出し、(iv)前記流体溶浸材(30)を前記CMCプレフォーム(10、210)に塗布した後の酸化、および(v)前記流体溶浸材(30)を前記CMCプレフォーム(10、210)に塗布した後の溶解のうちの1つまたは複数によって除去される1つまたは複数の犠牲材料を含む、請求項1に記載の方法(300)。
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