Oxidation behavior of fully dense TiAl-based composites with a controlled laminated microstructure
Oxidation behavior of fully dense TiAl-based composites with a controlled laminated microstructure
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DOI：
10.1016/j.jmrt.2021.06.053
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发表时间：
2021-09
期刊：
影响因子：
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通讯作者：
X. Yang;Xuewen Li;Tongtong Zhang;Chao Xu;G. Fan;J. Zhang
中科院分区：
文献类型：
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作者：
X. Yang;Xuewen Li;Tongtong Zhang;Chao Xu;G. Fan;J. Zhang
采用Ti/Al-6Si交替箔热压和多步反应退火工艺，成功制备了由等轴晶层和全层晶层交替构成的新型层压TiAl基复合材料。研究了LMC在800 °C下的氧化行为。结果表明，在800 °C下氧化100 h后，氧化膜形成典型的多层结构。EGL和FGL的氧化行为不同，但氧化膜的厚度几乎相同，表明LMC的各向同性抗氧化性。Si的添加有效地提高了LMC的抗氧化性。
A novel laminated TiAl matrix composite (LMC) consisting of alternating equiaxed grain layers (EGLs) and fully lamellar grain layers (FGLs) has been fabricated successfully by hot pressing of alternating Ti/Al–6Si foils and subsequent multi-step reaction annealing. The oxidation behavior of the LMC at 800 °C was studied. The results show that the oxide scale is formed with typical multilayer structure after oxidized at 800 °C for 100 h. The oxidation behavior is different between EGLs and FGLs while the thickness of oxide scale is almost identical, suggesting an isotropy oxidation resistance of the LMC. Si addition effectively enhances the oxidation resistance of the LMC.