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<p>Amorphous alloys and metallic glass fibers have superior properties for both structural and functional applications. In this study, Fe<sub>78</sub>Si<sub>9</sub>B<sub>13</sub> amorphous alloys were annealed in air at 25–400&#xa0;°C for 0–60&#xa0;min to introduce surface oxidation. Pristine fibers with a volume content of 0, 0.25, 0.5, 0.75, 1, 1.25 and 1.5 vol% and surface-oxidized fibers with a content of 0.5 vol% were used to prepare fiber reinforced cement mortars. Structural, thermal, magnetic and mechanical properties were characterized for pristine fibers, oxidized fibers and mortar specimens. Air-annealed alloys remain amorphous and produce a partially oxidized surface, which reduces saturation magnetization. Mortars reinforced by pristine fibers exhibit 6.4% and 32.4% of increase in compressive strength and flexural strength respectively, due to fiber-paste interfaces. Surface oxidation of the fibers improves the efficiency of load-transfer and, as a result, further enhances the strengths of fiber reinforced mortar. This study demonstrates that surface oxidation of metallic glass fibers is a viable strategy to enhance performances of cement-based materials.</p>

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Surface oxidation of FeSiB amorphous alloy and its effect on metallic glass fiber reinforced cement mortar

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月17日

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  • Yao Xia,
  • Yiyue Chen,
  • Xing Qin,
  • Lei He,
  • Bowen Dong,
  • Song Lan

摘要

Amorphous alloys and metallic glass fibers have superior properties for both structural and functional applications. In this study, Fe78Si9B13 amorphous alloys were annealed in air at 25–400 °C for 0–60 min to introduce surface oxidation. Pristine fibers with a volume content of 0, 0.25, 0.5, 0.75, 1, 1.25 and 1.5 vol% and surface-oxidized fibers with a content of 0.5 vol% were used to prepare fiber reinforced cement mortars. Structural, thermal, magnetic and mechanical properties were characterized for pristine fibers, oxidized fibers and mortar specimens. Air-annealed alloys remain amorphous and produce a partially oxidized surface, which reduces saturation magnetization. Mortars reinforced by pristine fibers exhibit 6.4% and 32.4% of increase in compressive strength and flexural strength respectively, due to fiber-paste interfaces. Surface oxidation of the fibers improves the efficiency of load-transfer and, as a result, further enhances the strengths of fiber reinforced mortar. This study demonstrates that surface oxidation of metallic glass fibers is a viable strategy to enhance performances of cement-based materials.