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发明公开
CN105693261A 一种ZrB2-SiC-Cf超高温陶瓷复合材料及其制备方法 无效 - 撤回

一种ZrB2-SiC-Cf超高温陶瓷复合材料及其制备方法
摘要：
本发明公开了一种ZrB2-SiC-Cf超高温陶瓷复合材料及其制备方法，属于超高温陶瓷复合材料领域。本发明旨在克服ZrB2基超高温陶瓷的本征脆性。本发明的复合材料按体积分数是由30％～60％粒径为100～200nm的ZrB2粉体、15％～30％粒径为100～500nm的SiC粉体和20％～50％碳纤维制成的。方法：一、将ZrB2粉体、SiC粉体和碳纤维加入到无水乙醇中，进行超声清洗；二、然后球磨，干燥；三、然后研磨过筛，装入石墨模具，在1400～1500℃、压力20～40MPa下热压烧结，然后冷却至室温，得到ZrB2-SiC-Cf超高温陶瓷复合材料。本发明具有烧结温度低、纤维损伤小、复合材料破坏应变高等特点；本发明的烧结温度为1400～1500℃。本发明的超高温陶瓷复合材料可应用于超高温防热结构材料等领域。
摘要（英）：

The invention discloses a ZrB2-SiC-Cf ultra-high temperature ceramic composite material and a preparation method thereof, belongs to the field of ultra-high temperature ceramic materials, and aims at overcoming the intrinsic brittleness of ZrB2-based ultra-high temperature ceramics.The composite material is prepared from, by volume, 30%-60% of ZrB2 powder with the particle size ranging from 100 nm to 200 nm, 15%-30% of SiC powder with the particle size ranging from 100 nm to 500 nm and 20%-50% of carbon fibers.The method comprises the steps that 1, the ZrB2 powder, the SiC powder and the carbon fibers are added into absolute ethyl alcohol for ultrasonic cleaning; 2, ball milling and drying are conducted; 3, grinding and sieving are conducted, the mixture is put into a graphite die, hot-pressure sintering is conducted at the temperature of 1,400-1,500 DEG C and pressure of 20-40 MPa, cooling is conducted to reach the room temperature, and the ZrB2-SiC-Cf ultra-high temperature ceramic composite material is obtained.The ZrB2-SiC-Cf ultra-high temperature ceramic composite material and the preparation method thereof have the advantages that the sintering temperature is low, the fiber damage is small, and the failure strain of the composite material is high; the sintering temperature ranges from 1,400 DEG C to 1,500 DEG C; the ultra-high temperature ceramic composite material can be applied to the fields of ultra-high temperature thermal-protection structure materials and the like.

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