Coating layer-attached continuous ceramic fiber and method for producing same, and ceramic matrix composite material and method for producing same
A continuous fiber, ceramic matrix technology, used in fiber processing, textiles and papermaking, etc., to achieve the effect of improving damage tolerance
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Embodiment A1
[0077] (Production of continuous alumina fiber coated with zirconia)
[0078] Zirconium (IV) acetylacetonate (Zr(CH 3 COCHCOCH 3 ) 4 ) 3.5 g was dissolved in 350 mL of ethanol to prepare an impregnation solution. Alumina continuous fibers (alumina fiber cloth, manufactured by 3M Japan Limited, trade name: Nextel 610) desized in the air at 700°C were put into the impregnation solution, and impregnated at room temperature for 24 hours. It should be noted that the total surface area of alumina continuous fibers is 6.2m 2 The amount of zirconium (IV) acetylacetonate was greatly excessive relative to the coverage obtained by the above formula (1) (100% coverage: 0.0158 g), and the coverage of the surface hydroxyl group of the alumina continuous fiber was 100% way to adjust. Thereafter, the alumina continuous fibers were taken out from the impregnation solution, and heated at 900° C. under normal pressure for 2 hours in the air. Such an impregnation step and heat treatment s...
Embodiment A2
[0093] (Production of zirconia-coated mullite continuous fiber)
[0094] Zirconium (IV) acetylacetonate (Zr(CH 3 COCHCOCH 3 ) 4 ) 3.5 g was dissolved in 350 mL of ethanol to prepare an impregnation solution. Mullite continuous fibers (mullite fiber cloth, manufactured by 3M Japan Limited, trade name: Nextel 720) subjected to desizing treatment (heat treatment at 800° C. in the atmosphere) were put into the impregnation solution, and impregnated at room temperature for 24 hours. It should be noted that the total surface area of mullite continuous fibers is 5.5m 2 , so that the amount of zirconium (IV) acetylacetonate is greatly excessive relative to the coverage obtained by the above formula (1) (100% coverage: 0.0125g), the coverage of the surface hydroxyl group of the mullite continuous fiber is Become 100% way to tune in. Thereafter, the mullite continuous fibers were taken out from the impregnation liquid, and heated at 900° C. under normal pressure for 2 hours in th...
Embodiment A3
[0101] (Production of alumina continuous fiber coated with lanthanum oxide)
[0102] Zirconium (IV) acetylacetonate is converted to lanthanum (III) acetylacetonate dihydrate (La(CH 3 COCHCOCH 3 ) 3 2H 2 O), except that, the alumina continuous fiber covered with lanthanum oxide was obtained by the same method as Example A1. It should be noted that the total surface area of alumina continuous fibers is 6.2m 2 , so that the amount of lanthanum (III) acetylacetonate was greatly excessive (3.5 g) relative to the coverage obtained by the above formula (1) (100% coverage: 0.0188 g), the surface hydroxyl group of the alumina continuous fiber The coverage rate is adjusted so that it becomes 100%.
[0103] The surface of the obtained lanthanum oxide-coated alumina continuous fiber was photographed by TEM. Figure 5 (a) is an image of the lanthanum oxide-coated alumina continuous fiber of Example A3 taken by TEM. Figure 5 (b) is to represent EDS-based Figure 5 (a) Image of al...
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