Abstract
In this paper, new titanium matrix composites (TMCs) with in situ synthesized multiphase (TiB, TiC, Ti5Si3) hybrid reinforcement were prepared by spark plasma sintering (SPS) using Ti555-type titanium alloy (Ti–5.4Al–4.03Mo–3.93V–2.37Cr–0.01Zr) and B4CP, CNT, and SiCP as primary powders. The effects of different reinforcements on the hot corrosion performance of the materials were investigated by scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD), and the corrosion weight gain, corrosion thickness and corrosion products were analyzed and tested. The results showed that the corrosion products of the base alloy, TMC1 (3.5 vol % B4CP) and TMC3 (3.5 vol % B4CP + 1.5 vol % CNT) were mainly Al2O3, TiO2, NaTiO2 and TiS2, while TMC2 (3.5 vol % B4CP + 1.5 vol % SiCP), in addition to the above products SiO2 was also detected, which has a good corrosion resistance. Furthermore, the corrosion weight gain and corrosion depth of the matrix, TMC1, TMC3, and TMC2 gradually decreased, with corrosion depths of 49, 37, 23, and 14 μm, respectively, indicating that the corrosion resistance of the composites gradually increased, with TMC2 having the best corrosion resistance and the lowest corrosion weight gain of 10.264 mg cm–2. Throughout the corrosion process, the excellent hot corrosion resistance the degree is TMC2 > TMC3 > TMC1 > matrix in order.
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This work is supported by the Key Projects of the 13th Five-Year Plan Equipment Pre-research Foundation of the Ministry of Equipment Development of the Central Military Commission of China (no. 6140922010201).
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Jianming Wu, Xu, X., Bai, X. et al. Hot Corrosion Behavior of a Ti–Al–Mo–V–Cr–Zr Titanium Matrix Composite Reinforced with In Situ Multiple Phases (TiB, TiC, and Ti5Si3) Prepared by Spark Plasma Sintering. Prot Met Phys Chem Surf 59, 245–253 (2023). https://doi.org/10.1134/S2070205122060193
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DOI: https://doi.org/10.1134/S2070205122060193