渗硅技术原位制备Ti3SiC2-SiC复合材料的新工艺

doi:10.3724/SP.J.1077.2010.10041

无机材料学报 ›› 2010, Vol. 25 ›› Issue (9): 1003-1008.DOI: 10.3724/SP.J.1077.2010.10041

• 研究快报 • 上一篇

渗硅技术原位制备Ti₃SiC₂-SiC复合材料的新工艺

卢翠英^1,2, 殷小玮², 李向明²

(1. 榆林学院化工与化学学院, 榆林719000; 2. 西北工业大学超高温结构复合材料国防科技重点实验室, 西安710072)

收稿日期:2010-01-25 修回日期:2010-04-23 出版日期:2010-09-20 网络出版日期:2010-08-25
基金资助:
National Nature Science Foundation of China (50802074)

A Novel in-situ Synthesis Route of Ti₃SiC₂-SiC Composite by Liquid Silicon Infiltration

LU Cui-Ying^{1, 2}, YIN Xiao-Wei², LI Xiang-Ming²

(1. School of Chemistry and Chemical Engineering, Yulin College, Yulin 71900, China; 2. National Key Laboratory of
Thermostructure Composite Materials, Northwestern Polytechnical University, Xi’an 710072, China)

Received:2010-01-25 Revised:2010-04-23 Published:2010-09-20 Online:2010-08-25

摘要/Abstract

摘要：

提出制备Ti₃SiC₂-SiC复合材料的一种新思路, 即利用液态硅渗透TiC/C预制体原位反应制备Ti₃SiC₂-SiC复合材料, 并采用XRD、SEM和EDS考察了材料的显微结构和力学性能. 结果表明: 制备出材料主要由Ti₃SiC₂相组成, SiC相含量较少; Ti₃SiC₂晶相呈现出3~10μm大小的层状结构; 施加10kg的压力下测得样品S1550-1, S1550-3和S1550-4的硬度分别为6.8GPa、7.1GPa 和7.8GPa, 它们的密度在3.55~3.96g/cm³范围内. 实验结果表明,利用液态硅渗透技术原位制备Ti₃SiC₂-SiC复合材料是一种可行的新工艺.

关键词: 液态硅渗透, 新型原位合成, TiC/C预制体, Ti₃SiC₂-SiC复合材料

Abstract:

The aim of the present work was to prepare Ti₃SiC₂-SiC composite by using liquid silicon infiltration (LSI) from TiC/C preform. XRD, SEM and EDS were used to identify the formed phases and analyze the microstructures of the obtained composites. The results show that the composites are made of Ti₃SiC₂ and small SiC. The surface morphologies of Ti₃SiC₂ exhibit plate-like structure with the grain size of 3-10um. The hardness of S1550-1, S1550-3 and S1550-4 is 6.8GPa, 7.1GPa and 7.8GPa for a load of 10kg, respectively. Their density is in the range of 3.55-3.96g/cm³. All the experimental results prove that the novel in situ synthesis route of Ti₃SiC₂-SiC composite by LSI is feasible.

Key words: LSI, novel in-situ rout of synthesis, TiC/C performs, Ti₃SiC₂-SiC composites

中图分类号:

TQ33

卢翠英, 殷小玮, 李向明. 渗硅技术原位制备Ti₃SiC₂-SiC复合材料的新工艺[J]. 无机材料学报, 2010, 25(9): 1003-1008.

LEI Cui-Yang, YIN Xiao-Wei, LI Xiang-Meng. A Novel in-situ Synthesis Route of Ti₃SiC₂-SiC Composite by Liquid Silicon Infiltration[J]. Journal of Inorganic Materials, 2010, 25(9): 1003-1008.

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渗硅技术原位制备Ti₃SiC₂-SiC复合材料的新工艺

A Novel in-situ Synthesis Route of Ti₃SiC₂-SiC Composite by Liquid Silicon Infiltration

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