Use of Zr-Ti Alloy Melt Infiltration for Fabricating Carbon-Fiber-Reinforced Ultrahigh-Temperature Ceramic Matrix Composites

被引:13
作者
Arai, Yutaro [1 ]
Marumo, Tomoki [2 ]
Inoue, Ryo [2 ]
机构
[1] Tokyo Univ Sci, Dept Mat Sci & Technol, Katsushika Ku, 6-3-1 Niijyuku, Tokyo 1258585, Japan
[2] Tokyo Univ Sci, Dept Mech Engn, Katsushika Ku, 6-3-1 Niijyuku, Tokyo 1258585, Japan
关键词
melt infiltration; Zr-Ti alloys; ultrahigh-temperature ceramic composites; capillary flow; ZRB2-SIC-ZRC TERNARY COMPOSITES; OXIDATION BEHAVIOR; FRACTURE; DESIGN;
D O I
10.3390/jcs5070186
中图分类号
TB33 [复合材料];
学科分类号
摘要
Carbon-fiber-reinforced ultrahigh-temperature ceramic (C/UHTC) matrix composites are an attractive candidate for fabricating various hot structures. The present study aimed to establish a Si-free Zr-Ti melt-infiltration method for fabricating C/UHTC matrix composites. To achieve this, the wettability of Zr-Ti alloys on carbon and their reactivity to carbon were examined. The alloys were melted on graphite plates and infiltrated into model preforms, which were made of porous carbon and had median pore diameters of 3 mu m. The results showed that the apparent contact angle between Zr-Ti and C measured from melted alloys on carbon in room temperature was similar to 20-42 degrees and that the alloys infiltrated into the preforms regardless of the Zr or Ti content. However, with an increase in the Zr content in the alloys, carbon disappeared and was absorbed into the alloys since the reactivity of Zr was higher than that of Ti and the specific surface area of the porous preform was higher than that of carbon-fiber-reinforced carbon composites, which are a typical preform of C/UHTC matrix composites. These results clearly indicate that not only the capillary flow during infiltration but also the reactivity of alloys to preforms should be considered in the process design for fabricating high-density composites via Zr-Ti infiltration.
引用
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页数:12
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