Preparation of Cf/ZrC Composites by Reactive Melt Infiltration at Relatively Low Temperature

被引：0
|
作者：
Zhu Yulin [1 ]
Wang Song [1 ]
Li Wei [1 ]
Chen Zhaohui [1 ]
机构：
[1] Natl Univ Def Technol, Sci & Technol Adv Ceram Fibers & Composites Lab, Changsha 410073, Hunan, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2013年 / 42卷
关键词：
C-f/ZrC composites; reactive melt infiltration; solution-precipitation mechanism; anti-ablation properties; POROSITY; CARBIDE;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
C-f/ZrC composite was prepared by infiltrating porous C-f/C preform with melting Zr2Cu alloy at 1200 degrees C in vacuum. The results show that the ZrC as the main phase has a content of 43.8 +/- 1.3% (volume fraction). The flexural strength and modulus is 105.7 +/- 5.3 MPa and 64.3 +/- 2.8 GPa, respectively. ZrC growth is controlled by solution-precipitation mechanism. The carbon dissolves in the melting metals and forms C-Zr-Cu miscible phase. Then ZrC nanocrystals are deposited after the melt is saturated, and grow quickly by amalgamation and diffusion. The mass loss rate and linear recession rate of the sample is 0.0039 +/- 0.0008 g/s and 0.0023 +/- 0.0012 mm/s, respectively. So the C-f/ZrC composites show good anti-ablation properties.
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页码：447 / 450
页数：4
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