Zr基超高温梯度复合材料的显微组织和烧蚀行为

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中文摘要：为了获得高性能Zr基超高温复合材料,利用反应熔渗工艺,通过改变原料的铺制方式得到Zr基超高温梯度复合材料.研究原料的铺制方式对梯度Zr基超高温复合材料显微组织和烧蚀性能的影响.结果表明,当改变熔渗原料的成分比例时,梯度Zr基超高温复合材料的梯度结构不同,当Zr/Mo/Si层厚度分别为6/4/12 mm 和8/2/12 mm时,样品中SiMoZrC固溶体的含量沿着熔渗方向增加和减少.将梯度样品在3000 ℃的氧乙炔火焰下烧蚀40 s,当样品的熔渗原料状态为粉末、Zr/Mo/Si层厚度为6/4/12 mm时,材料的抗烧蚀性能最好.

外文标题：Microstructure and ablation behavior of Zr-based ultra-high-temperature gradient composites

外文摘要：To obtain high-performance Zr-based ultra-high-temperature composites,Zr-based ultra-high-temperature gradient composites were prepared by changing the laying method of the infiltrant via reactive melt infiltration.The effects of different infiltrant laying methods on the micro structure and ablative properties of Zr-based ultrahigh-temperature gradient composites were investigated.The results showed that the gradient structure of the Zr-based ultrahigh-temperature gradient composites differed when the composition ratio of the infiltrant was changed.When the thicknesses of the Zr/Mo/Si layers were 6/4/12 mm and 8/2/12 mm,the SiMoZrC solid solution content in the samples increased and decreased along the infiltration direction,respectively.The gradient samples were ablated in an oxyacetylene flame at 3000 ℃ for 40 s.The ablation resistance of the sample was the highest when the infiltrant was a powder and the thickness of the Zr/Mo/Si layer was 6/4/12 mm.

外文关键词：

reactive melt infiltrationceramic-matrix compositesgradient materialmicrostructureablation property

作者：

刘清华、田甜、孙威、张红波、熊翔

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作者单位：

中南大学粉末冶金国家重点实验室,长沙 410083

中南大学轻质高强结构材料国家重点实验室,长沙 410083

关键词：

反应熔渗陶瓷基复合材料梯度材料显微组织烧蚀性能

基金：

National Natural Science Foundation of ChinaOpen Fund for Hubei Provincial Key Laboratory of Advanced Aerospace Power Technology,ChinaHunan Graduate Research Innovation Project,China

项目编号：

U19A2099DLJJ2103007CX20220097

出版年：

2024

DOI：

10.1016/S1003-6326(24)66583-0

中国有色金属学报(英文版)

中国有色金属学会

中国有色金属学报(英文版)

CSTPCD

影响因子：1.183

ISSN：1003-6326

年,卷(期)：2024.34(9)

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