SiCf/Ti2AlNb复合材料的界面反应及热稳定性

doi:10.12068/j.issn.1005-3026.2022.08.006

东北大学学报（自然科学版） ›› 2022, Vol. 43 ›› Issue (8): 1105-1112.DOI: 10.12068/j.issn.1005-3026.2022.08.006

SiC_f/Ti₂AlNb复合材料的界面反应及热稳定性

符跃春¹，韦泽麒¹，杨丽娜²，王玉敏²

(1. 广西大学资源环境与材料学院，广西南宁530004； 2. 中国科学院金属研究所，辽宁沈阳110016)

修回日期:2021-07-19 接受日期:2021-07-19 发布日期:2022-08-11
通讯作者: 符跃春
作者简介:符跃春(1977-)，女，河南洛阳人，广西大学教授；王玉敏(1971-)，男，内蒙古赤峰人，中国科学院金属研究所研究员，博士生导师.
基金资助:
-

Interfacial Reaction and Thermal Stability of SiC_f/Ti₂AlNb Composites

FU Yue-chun¹， WEI Ze-qi¹， YANG Li-na²， WANG Yu-min²

1. School of Resources， Environment and Materials， Guangxi University， Nanning 530004， China; 2. Institute of Metal Research， Chinese Academy of Sciences， Shenyang 110016， China.

Revised:2021-07-19 Accepted:2021-07-19 Published:2022-08-11
Contact: FU Yue-chun
About author:-
Supported by:
-

摘要/Abstract

摘要： 界面反应层是影响SiC纤维(SiC_f)增强钛基复合材料力学性能的重要因素，本文研究了SiC_f/Ti₂AlNb复合材料在热等静压成型以及热暴露过程中的界面反应、界面元素分布规律和界面热稳定性.研究结果表明:SiC_f/Ti₂AlNb复合材料内部元素扩散形成的界面产物主要为TiC，在热暴露过程中出现了TiSi₂和NbSi₂相.SiC_f/Ti₂AlNb复合材料界面反应层的厚度长大符合Arrhenius定律，其界面反应层厚度长大速率随着热暴露温度的升高而增加.界面反应层长大激活能为24.27kJ/mol，界面层长大频率因子为2.80×10^-4 m/s^1/2.SiC_f/Ti₂AlNb复合材料界面在700℃及以下温度具备良好的热稳定性.

关键词: 钛基复合材料；Ti₂AlNb；界面反应；元素扩散；热稳定性

Abstract: The layer of interfacial reaction(IR)is an important influencing factor on mechanical properties of SiC fiber (SiC_f) reinforced titanium matrix composites. The interfacial reaction， element distribution at the interface and interfacial thermal stability of SiC_f/Ti₂AlNb composites during hot isostatic pressing and thermal exposure procedures are studied. The results show that the main IR product in SiC_f/Ti₂ AlNb composites is TiC， and the TiSi₂ and NbSi₂ phases are observed during the thermal exposure procedure. The thickness of IR layer in the SiC_f/Ti₂AlNb composite obeys the Arrhenius law， and the growth rate of IR layer increases with the thermal exposure temperature. The activation energy for the IR layer growth is 24.27kJ/mol， and the frequency factor is 2.80×10^-4 m/s^1/2. The interface of SiC_f/Ti₂AlNb composites shows good thermal stability at 700℃ and below.

Key words: titanium matrix composites; Ti₂AlNb; interfacial reaction; element diffusion; thermal stability

中图分类号:

TG146.23

符跃春，韦泽麒，杨丽娜，王玉敏. SiC_f/Ti₂AlNb复合材料的界面反应及热稳定性[J]. 东北大学学报（自然科学版）, 2022, 43(8): 1105-1112.

FU Yue-chun， WEI Ze-qi， YANG Li-na， WANG Yu-min. Interfacial Reaction and Thermal Stability of SiC_f/Ti₂AlNb Composites[J]. Journal of Northeastern University(Natural Science), 2022, 43(8): 1105-1112.

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SiC_f/Ti₂AlNb复合材料的界面反应及热稳定性

Interfacial Reaction and Thermal Stability of SiC_f/Ti₂AlNb Composites

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