Ceramic continuous fiber cloth

Abstract

The objective is to provide a ceramic continuous fiber cloth that provides a CMC that is less susceptible to creep rupture at high temperatures compared to conventional CMCs, a method for manufacturing the same, a ceramic matrix composite material containing the same, and at least one of the methods for manufacturing the same. [Solution] A ceramic continuous fiber cloth characterized by containing a doped metal element, wherein the average unit content of the doped metal element is 10 ppm by mass or more and 1000 ppm by mass or less, and the coefficient of variation of the unit content of the doped metal element is less than 0.48.

Claims

1. A ceramic continuous fiber cloth characterized by containing a doped metal element, wherein the average unit content of the doped metal element is 10 ppm by mass or more and 1000 ppm by mass or less, and the coefficient of variation of the unit content of the doped metal element is less than 0.

48.

2. The ceramic continuous fiber cloth according to claim 1, wherein the doped metal element is one or more selected from the group consisting of rare earth elements, zirconium (Zr), chromium (Cr), and magnesium (Mg).

3. The ceramic continuous fiber cloth according to claim 1 or 2, wherein the ceramic continuous fiber cloth is one or more selected from the group consisting of silicon carbide fiber cloth, alumina fiber cloth, mullite fiber cloth, and alumina and mullite mixed fiber cloth.

4. The ceramic continuous fiber cloth according to claim 1 or 2, wherein the average thickness is 0.2 mm or more.

5. A ceramic continuous fiber cloth according to claim 1 or 2, comprising ceramic continuous fibers having a single fiber strength of 1.0 GPa or more.

6. A ceramic continuous fiber cloth according to claim 1 or 2, comprising ceramic continuous fibers having a standard deviation of single fiber strength of 0.7 GPa or less.

7. The ceramic continuous fiber cloth according to claim 1 or 2, wherein the ceramic continuous fiber cloth is at least one of an alumina fiber cloth containing zirconium, and an alumina and mullite mixed fiber cloth containing one or more selected from the group consisting of ytterbium, chromium, and yttrium.

8. A method for producing a ceramic continuous fiber cloth according to claim 1, comprising contacting a ceramic continuous fiber cloth with a solution containing a metal acetylacenate complex to obtain a complex-containing cloth, washing the complex-containing cloth to obtain a washed cloth, and heat-treating the washed cloth.

9. The manufacturing method according to claim 8, wherein the cleaning is performed by stirring the cleaning solution.

10. The manufacturing method according to claim 8 or 9, wherein the washing is performed by stirring the washing solution while the complex-containing fiber cloth is laminated.

11. The manufacturing method according to claim 9 or 10, wherein the washing solution is one or more selected from methanol, ethanol, propanol, acetone, tetrahydrofuran, benzene, water, and heavy water.

12. The manufacturing method according to claim 8 or 9, further comprising preheating the washing cloth by heat treatment at 500°C or more and less than 950°C, followed by heat treatment at 950°C or more and 1300°C or less.

13. A ceramic matrix composite material comprising the ceramic continuous fiber cloth described in claim 1 or 2.

14. A method for producing a ceramic matrix composite material, comprising compounding a ceramic continuous fiber cloth according to claim 1 or 2 with a ceramic matrix.

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