Microstructure, wear and corrosion behaviors of TC21 titanium alloy by solid powder-packing boriding and aluminizing

作者：Yuwei Guo, Ziqiang Wang, Na Li, Shankai Yang, Yuyu Wu, Yonghua Duan, Ancang Yang, Lishi Ma, Shanju Zheng, Yunping Li · 发表于：Journal of Materials Research and Technology · 年份：2025 · DOI：10.1016/j.jmrt.2025.04.280 · 被引用次数：11 · 研究领域：Metal and Thin Film Mechanics、Titanium Alloys Microstructure and Properties、Advanced materials and composites

In this work, TC21 titanium alloy was treated using solid powder-packing infiltration method with single boriding , single aluminizing and first-stage boriding and second-stage aluminizing (B–Al). The microstructure of the infiltration layer was characterized by scanning electron microscopy, X-ray diffraction, and electron probe microanalysis . The results indicate that the B–Al layer combines the microstructural characteristics of boriding and aluminizing, consisting of an outer TiB 2 layer, dispersed TiB whiskers + Al 3 Ti layer, and a diffusion transition zone. The measured hardness, wear and corrosion behaviors show that the specimen treated with first-stage boriding and second-stage aluminizing has high surface hardness, good wear resistance, and great corrosion resistance . Finally, the corrosion mechanism was also discussed.