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Fabrication of Ceramic Fiber-reinforced Alumina Composites Using Reactive Infiltration

采用反应渗透法制备陶瓷纤维增强氧化铝复合材料

基本信息

批准号：
07455267
负责人：
WATARI Takanori
金额：
$ 2.3万
依托单位：
Saga University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07455267/
关键词：
Reactive infiltration Ceramic fiber Alumina Aluminum Composite

项目摘要

Ceramic fiber-reinforced Al_2O_3/metal composites were fabricated by infiltrating molten Al into the Al_2O_3 and Tohdo preforms embedded with Al_2O_3 powder, Al_2O_3 fiber, ZrO_2 fiber, SiC whisker, SiC fiber, and Si-Ti-C-O fibers. The following results were obtained. (Al_2O_3 preform) (1) The preform of 5mm in thickness could be infiltrated at 1050ﾟC for 3h using Pyrex glass. (2) The porosity of the compact decreased from 50vol% to 4-10vol%. (3) The bending strength of the composites decreased from 500 to 309MPa with increasing SiC whisker content, but the fracture toughness increased from 3.8 to 4.5MPam^<1/2> with it. (4) The bending strength and the fracture toughness of the composite with 5wt% of SiC fiber were 403MPa and 3.1MPam^<1/2>, respectively. (5) The bending strength of the composite with Al_2O_3 fiber were 306MPa. (Tohdo Preform) (1) The infiltration rate into Tohdo/Al_2O_3 particles took a maximum value at an appropriate temperature. The bending strength and the fracture toughness of the resulting Al_2O_3/Al/Si composite were 240MPa and 4.3MPam^<1/2>, respectively. (2) The composite from the Tohdo with ZrO_2 fiber was Al_2O_3/Al/Si/ZrSi_2. The bending strength of the composites decreased from 360 to 110MPa with increasing fiber content, but the fracture toughness was almost constant. (3) The bending strength of the composites from Si-Ti-C-O fiber containing Tohdo decreased from 240 to 70MPa with increasing fiber content, but the fracture toughness increased from 3.3 to 6.6MPam^<1/2>.

采用熔渗法制备了陶瓷纤维增强Al_2O_3/金属复合材料，并将Al_2O_3、ZrO_2、SiC晶须、SiC纤维和Si-Ti-C-O纤维分别埋入Al_2O_3和Tohdo预制体中。获得了以下结果。(Al（1）用Pyrex玻璃在1050 ℃下浸渗3 h，可得到厚度为5 mm的预制体。(2)压坯的孔隙率从50vol%下降到4- 10vol%。(3)随着SiC晶须含量的增加，复合材料的抗弯强度从500 MPa下降到309 MPa，断裂韧性从3.8 MPam ^<1/2>增加到4.5 MPam ^<1/2>。（4）SiC纤维含量为5wt%时，复合材料的抗弯强度为403 MPa，断裂韧性为3.1 MPam ^<1/2>。(5)添加Al_2O_3纤维的复合材料的抗弯强度为306 MPa。（1）在适当的温度下，对Tohdo/Al_2O_3颗粒的渗透速率有一个最大值。Al_2O_3/Al/Si复合材料的抗弯强度和断裂韧性分别为240 MPa和4.3MPam^<1/2>。(2)由Tohdo与ZrO_2纤维制备的复合材料为Al_2O_3/Al/Si/ZrSi_2。随着纤维含量的增加，复合材料的弯曲强度从360 MPa下降到110 MPa，而断裂韧性基本不变。(3)随着纤维含量的增加，Si-Ti-C-O纤维复合材料的抗弯强度从240 MPa下降到70 MPa，断裂韧性从3.3 MPa增加到6.6 MPa ^（1/2）。