C/SiC–ZrB2–ZrC composites fabricated by reactive melt infiltration with ZrSi2 alloy
C/SiC–ZrB2–ZrC composites fabricated by reactive melt infiltration with ZrSi2 alloy
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DOI：
10.1016/j.ceramint.2012.05.035
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发表时间：
2012-12
影响因子：
5.2
通讯作者：
H. Pi;Shangwu Fan;Yiguang Wang
中科院分区：
文献类型：
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作者：
H. Pi;Shangwu Fan;Yiguang Wang
采用反应熔融渗透（RMI）结合真空压力浸渍（VPI）法制备了C/SiC-ZrB 2-ZrC复合材料。通过浸渍B4 C与酚醛树脂的混合物，在900°C下热解，将B4 C-C引入到孔隙率约为30%的C/SiC复合材料中。然后将ZrSi 2合金熔渗到多孔C/SiC-B4 C-C中，得到C/SiC-ZrB 2-ZrC复合材料。测试了弯曲强度。在氧乙炔炬火焰下研究了烧蚀行为。结果表明，C/SiC-ZrB 2-ZrC复合材料具有较高的抗弯强度和良好的耐烧蚀性能。研究了ZrSi 2合金与B4 C-C之间的反应，建立了ZrSi 2合金与B4 C-C之间的反应模型，并以此为基础描述了ZrSi 2合金与B4 C-C之间的反应机理。
C/SiC–ZrB2–ZrC composites were prepared by reactive melt infiltration (RMI) combined with vacuum pressure impregnation (VPI) method. B4C–C was first introduced into C/SiC composites with a porosity of about 30% by impregnating the mixture of B4C and phenol formaldehyde resin, followed by pyrolysis at 900°C. The molten ZrSi2alloy was then infiltrated into the porous C/SiC–B4C–C to obtain C/SiC–ZrB2–ZrC composites. The flexural strength was tested. The ablation behavior was investigated under an oxyacetylene torch flame. It has been found that the C/SiC–ZrB2–ZrC showed a high flexural strength and an excellent ablation resistance. The reactions between ZrSi2alloy and B4C–C were studied, and a model based on these reactions was built up to describe the formation mechanism of the matrix.