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<p>The complex mechanical service environment of Fe–Ga alloys in transducers, drivers and sensors requires the material itself to have good comprehensive performance, that is, high magnetostrictive strain, but also should have good mechanical properties. Considering that doping trace Tb element can improve the magnetostrictive strain of Fe–Ga alloys, Fe<sub>73</sub>Ga<sub>27−<i>x</i></sub>Al<sub><i>x</i></sub> and (Fe<sub>73</sub>Ga<sub>27−<i>y</i></sub>Al<sub><i>y</i></sub>)<sub>99.8</sub>Tb<sub>0.2</sub> (<i>x</i>, <i>y</i> = 0, 3, 4) were prepared by vacuum arc furnace in this paper to investigate the impact of Tb element doping on the properties of Fe–Ga alloys. The results show that Tb doping alters the orientation degree of <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10854_2025_15183_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="43" /> </InlineMediaObject> <EquationSource Format="TEX">\(\langle 100\rangle\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">⟨</mo> <mn>100</mn> <mo stretchy="false">⟩</mo> </mrow> </math></EquationSource> </InlineEquation>, softens the elastic modulus, and generates the Tb-rich phase at the grain boundary, thus affecting the magnetostrictive performance. The <i>λ</i><sub><i>∥</i></sub> of (Fe<sub>73</sub>Ga<sub>24</sub>Al3)<sub>99.8</sub>Tb<sub>0.2</sub> alloy peaks is 104 × 10<sup>−6</sup>, which is 68% higher than that of Fe<sub>73</sub>Ga<sub>24</sub>Al<sub>3</sub> alloy. The hardness of (Fe<sub>73</sub>Ga<sub>27</sub>)<sub>99.8</sub>Tb<sub>0.2</sub> alloy reaches the maximum value of 5.60 GPa, surpassing 10% for Fe<sub>73</sub>Ga<sub>27</sub> alloy. After Tb is added, the mass wear loss and mass wear rate of the alloys are decreased, proving that wear resistance is enhanced.</p>

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The effects of Tb doping on the magnetostrictive properties and mechanical properties of Fe73Ga27−xAlx alloys

  • 期刊论文

  • 发表日期：

    2025年7月6日

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  • Jinchao Du,
  • Xing Mu,
  • Zhiguang Zhang,
  • Dongliang Zhao

摘要

The complex mechanical service environment of Fe–Ga alloys in transducers, drivers and sensors requires the material itself to have good comprehensive performance, that is, high magnetostrictive strain, but also should have good mechanical properties. Considering that doping trace Tb element can improve the magnetostrictive strain of Fe–Ga alloys, Fe73Ga27−xAlx and (Fe73Ga27−yAly)99.8Tb0.2 (x, y = 0, 3, 4) were prepared by vacuum arc furnace in this paper to investigate the impact of Tb element doping on the properties of Fe–Ga alloys. The results show that Tb doping alters the orientation degree of \(\langle 100\rangle\) ⟨ 100 ⟩ , softens the elastic modulus, and generates the Tb-rich phase at the grain boundary, thus affecting the magnetostrictive performance. The λ∥ of (Fe73Ga24Al3)99.8Tb0.2 alloy peaks is 104 × 10−6, which is 68% higher than that of Fe73Ga24Al3 alloy. The hardness of (Fe73Ga27)99.8Tb0.2 alloy reaches the maximum value of 5.60 GPa, surpassing 10% for Fe73Ga27 alloy. After Tb is added, the mass wear loss and mass wear rate of the alloys are decreased, proving that wear resistance is enhanced.