原位合成TiC/Ti基复合材料氧化行为

覃业霞; 朱建勇; 吕维洁; 徐栋; 覃继宁; 张荻

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航空材料学报 ›› 2006, Vol. 26 ›› Issue (4) : 105-109.

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论文

原位合成TiC/Ti基复合材料氧化行为

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Oxidation Kinetics of in Situ Synthesized TiC/Ti Matrix Composites at Elevated Temperature

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文章历史 +

摘要

研究了TiC/Ti基复合材料在550℃,600℃和650℃空气中恒温氧化行为。分析了增强体TiC对钛基复合材料氧化动力学行为的影响,并用X射线衍射仪(XRD)和配有能谱仪(EDS)的扫描电子显微镜(SEM)对氧化层表面的相组成、形貌以及氧化层剖面的显微结构进行了分析。结果表明:TiC/Ti基复合材料的氧化层由金红石型的氧化物TiO2组成;增强体TiC能够提高钛基复合材料的抗氧化性,而且随着TiC增强体含量的增加,钛基复合材料的抗氧化性增加;这主要是因为TiC增强体能够促进致密氧化膜的生成。氧化动力学曲线为抛物线类型。

Abstract

The isothermal oxidation behavior of TiC/Ti Matrix Composites(TMCs) at 550℃,600℃ and 650℃ in air was investigated.The reaction products of the oxidation scale were examined by XRD.The surface morphology and cross-section microstructure of the oxidation scale were analyzed by SEM.An oxidation scale was mainly consisted of rutile-TiO2.The addition of TiC can improve the oxidation resistance of TMCs.Moreover,the increase percentage of TiC reinforcements can decrease the overall oxidation rate of TMCs at 550,600,and 650℃.It is attributed to the formation of thin and dense oxidation.The isothermal oxidation kinetic curves mainly follow parabolic rate law.

导出引用

覃业霞, 朱建勇, 吕维洁, 徐栋, 覃继宁, 张荻. 原位合成TiC/Ti基复合材料氧化行为[J]. 航空材料学报, 2006, 26(4): 105-109

QIN Ye-xia, ZHU Jian-yong, LU Wei-jie, XU Dong, QIN Ji-ning, ZHANG Di. Oxidation Kinetics of in Situ Synthesized TiC/Ti Matrix Composites at Elevated Temperature[J]. Journal of Aeronautical Materials, 2006, 26(4): 105-109

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