Abstract Porous Ti-Si-Mo intermetallic compounds were fabricated by reactive synthesis using C7H10N2O2S as a foaming agent. The effects of Mo content on the microstructure, phase composition and oxidation behavior were investigated. The results show that the porosity and the fractal dimension decreases and then increases as the Mo content increases. It is found that the pore size is mainly distributed in less than 1μm. The phase compositions mainly consist of TiSi, Ti5Si4, Mo5Si3 and TiO, and the Ti5Si3 phase is detected at Mo content of 16 wt.% in particular. In addition, the mass gain of the oxidized samples gradually decreases as the Mo content increases. It is concluded that the oxidation resistance at high-temperature generally decreases as the fractal dimension increases. It is suggested that porous Ti-Si-Mo intermetallic compounds have potential applications in sound absorption and heat dissipation at high-temperature.

中文翻译：

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反应合成多孔Ti-Si-Mo金属间化合物的显微结构、相组成及氧化行为

摘要 以C7H10N2O2S为发泡剂，通过反应合成制备多孔Ti-Si-Mo金属间化合物。研究了Mo含量对显微组织、相组成和氧化行为的影响。结果表明，随着Mo含量的增加，孔隙率和分形维数先减小后增大。发现孔径主要分布在1μm以内。相组成主要由 TiSi、Ti5Si4、Mo5Si3 和 TiO 组成，特别是在 Mo 含量为 16 wt.% 时检测到 Ti5Si3 相。此外，氧化样品的质量增益随着 Mo 含量的增加而逐渐降低。得出的结论是，高温下的抗氧化性通常随着分形维数的增加而降低。