摘要
利用海绵钛、高纯铝与TiC/Al中间合金的反应,采用非自耗电弧熔炼工艺,原位合成不同铝含量的复合材料。研究复合材料在800℃和900℃空气中的恒温氧化行为,分析不同铝含量对复合材料氧化动力学行为的影响,并用配有能谱分析仪的扫描电镜对氧化层表面及横断面显微结构和成分进行分析。结果表明,复合材料的氧化动力学曲线主要为抛物线类型;随着复合材料中铝含量的增加,表层铝的氧化物增多,钛的氧化物减少,氧化膜厚度逐渐减小,结构也发生明显变化,抗氧化性逐渐增强。
With the reaction between titanium （Ti） sponge, high purity aluminum （Al） and TiC/Al interalloy, non-consumable arc melting technique was successfully used in situ synthesize Ti matrix composites with different Al contents. The isothermal oxidation behavior of composites at 800℃ and 900℃ in air was investigated. The effect of different Al contents on composites was analyzed. The surface morphology and cross-section microstructure of the oxidation scale were examined by scanning electron microscope （SEM） with energy dispersive spectrometer （EDS）. The results show that the isothermal oxidation kinetic curves of composites mainly follow parabolic rate law. The oxidation resistance of composites increases with increasing Al content to a certain extent. Oxides of Al increase and oxides of Ti decrease.
出处
《航空材料学报》
EI
CAS
CSCD
2008年第2期60-64,共5页
Journal of Aeronautical Materials
关键词
钛基复合材料
高温氧化
氧化动力学
显微结构
titanium matrix composites
high temperature oxidation
oxidation kinetics
microstructure
