ZrCr共取代Ti对timn2基合金组织和储氢性能的影响

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-10-10 DOI:10.1016/j.mseb.2025.118849

Xiaomei Zhu , Zhen Yan , Zhiping Liu , Lele Gao , Xianglei Wang , Dongyang Zhang , Huihui Cao

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引用次数: 0

摘要

为了提高timn2基合金的吸氢和脱氢性能，设计了具有与Ti相同平均原子半径的取代元素Zr + Cr的Ti0.92-xZr0.08(Zr0.55Cr0.45)xMn0.7Cr1.1 （x = 0,0.02, 0.04）合金，研究了共取代对合金组织和储氢性能的影响。合金由单一的c14型Laves相组织组成。随着（Zr0.55Cr0.45）取代Ti的增加，电池体积增大，但（Zr0.55Cr0.45）的平均原子半径与Ti相等。这是因为较大的Zr占据了紧密排列的晶体平面，扩大了晶体单元。该合金具有优良的活化性能，可在一个循环内完全活化。（Zr0.55Cr0.45）的加入适当降低了吸氢和解吸平台压力，使P-C-T平台宽而平坦。高原斜率和吸氢/解吸滞后减小，吸氢过程加速，特别是在较高温度下。

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Effects of ZrCr co-substitution for Ti on the microstructure and hydrogen storage properties of TiMn2-based alloys

To improve the hydrogen absorption and desorption properties of TiMn₂-based alloys, Ti_0.92-xZr_0.08(Zr_0.55Cr_0.45)_xMn_0.7Cr_1.1 (x = 0, 0.02, 0.04) alloys with equal average atomic radius of the substitutional elements Zr + Cr to that of Ti are designed, and the effects of the co-substitution on the microstructure and hydrogen storge properties are studied. The alloys consist of single C14-type Laves phase structure. With increasing (Zr_0.55Cr_0.45) substitution for Ti, the cell volume increases although the average atomic radius of (Zr_0.55Cr_0.45) equalizes to that of Ti. This is because the bigger Zr occupies the close-packed crystal planes, expanding the crystal cells. The alloys have excellent activation property and can be fully activated within one cycle. (Zr_0.55Cr_0.45) addition properly decreases the hydrogen absorption and desorption plateau pressure, contributing to a wide and flat P-C-T plateau. Moreover, the plateau slope and hydrogen absorption/desorption hysteresis are reduced, and the hydrogen absorption process is accelerated, especially at relatively high temperatures.

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.