RU2020115056A - Способ получения полой детали из композиционного материала с керамической матрицей - Google Patents

Способ получения полой детали из композиционного материала с керамической матрицей Download PDF

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RU2020115056A
RU2020115056A RU2020115056A RU2020115056A RU2020115056A RU 2020115056 A RU2020115056 A RU 2020115056A RU 2020115056 A RU2020115056 A RU 2020115056A RU 2020115056 A RU2020115056 A RU 2020115056A RU 2020115056 A RU2020115056 A RU 2020115056A
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preform
core
paragraphs
heating
fibrous
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RU2020115056A
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RU2770493C2 (ru
RU2020115056A3 (ru
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Маттье Арно ЖИМА
Реми ДЮПОН
Максим Франсуа Роже КАРЛЕН
Эрик Филипп
Бенжамен ЛАКОМБ
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Сафран Серамикс
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Claims (10)

1. Способ получения полой детали из композиционного материала с керамической матрицей, включающий стадии, на которых формуют волокнистую полую преформу (1), при этом, сердцевина (2) из окисляемого материала размещена или вставлена в преформу (Е1); отверждают преформу (Е3, Е4); и извлекают сердцевину посредством окисления сердцевины (Е5).
2. Способ по п. 1, в котором стадия (Е5) извлечения сердцевины посредством окисления включает подстадии, на которых нагревают преформу (1), в которую вставлена сердцевина (2), в печи в окислительной атмосфере; механически извлекают окисленную сердцевину, например, посредством соскабливания.
3. Способ по п. 2, в котором нагревание осуществляют в присутствии катализатора, такого, как, например, ацетат калия.
4. Способ по п. 2 или 3, в котором нагревание осуществляют при температуре от 400°С до 800°С.
5. Способ по одному из пп. 2-4, в котором нагревание включает первый цикл нагревания длительностью от 20 ч до 30 ч; второй цикл нагревания длительностью от 10 ч до 15 ч.
6. Способ по одному из пп. 1-5, в котором окисляемая сердцевина (2) выполнена из углерода, графита или другого материала, производного от углерода.
7. Способ по одному из пп. 1-6, в котором волокнистая полая преформа (1) получена посредством укладывания или соединения волокнистых структур вокруг сердцевины или посредством тканья преформы, в которой имеется полая зона для размещения сердцевины.
8. Способ по одному из пп. 1-7, в котором отверждение преформы (Е3, Е4) включает подстадии, на которых создают, по меньшей мере, одну граничную фазу, например, из нитрида бора, на волокнах волокнистой преформы (1) посредством химической пропитки в газовой фазе; создают, по меньшей мере, один слой керамической матрицы, например, из карбида кремния, на граничной фазе посредством химической пропитки в газовой фазе.
9. Способ по одному из пп. 1-8, в котором за стадией (Е5) извлечения сердцевины посредством окисления следует стадия уплотнения преформы (Е6, Е7), состоящей, по меньшей мере отчасти, в том, что вводят в преформу металлический порошок, например, порошок кремния (Е6); пропитывают преформу расплавленным металлом, например, расплавленным кремнием (Е7).
10. Способ по одному из пп. 1-9, в котором за стадией извлечения сердцевины посредством окисления следуют стадии, состоящие в том, что обрабатывают деталь (Е8); покрывают наружную поверхность детали покрытием, образующим термический барьер или защиту от окружающей среды (Е9).
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