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<p>MAX phase-reinforced Ag matrix electrical functional composites exhibit potential application in low-voltage appliance due to its excellent conductive and mechanical feature. Previous studies showed that A atomic layer in MAX phase generally reacts with Ag and affects the interfacial structure and overall properties of composites. However, the effect of changing A element and crystal structure of MAX phase on Ag matrix composites have not been explored. In this work, the representative MAX phases, Ti<sub>3</sub>AlC<sub>2</sub>, Ti<sub>2</sub>AlC, and Ti<sub>2</sub>SnC, wEre chosen to prepare Ag/M<sub><i>n+1</i></sub>AX<sub><i>n</i></sub> (A = Sn, Al, <i>n</i> = 1, 2) electrical functional composites. For the same 211 structure, Sn layer within Ti<sub>2</sub>SnC demonstrates a greater susceptibility to temperature induction (800°C/2&#xa0;h) compared to Ti<sub>2</sub>AlC, thus facilitating a substantial Sn diffusion with Ag, leading to a notable increase in electrical resistivity (8.65 μΩ&#xa0;cm) and decrease in tensile strength (134.56&#xa0;MPa). For the same Al element in 211 and 312 structure, Al layer within Ti<sub>2</sub>AlC and Ti<sub>3</sub>AlC<sub>2</sub> possesses excellent stability to resist high-temperature and has less Ag-Al diffusion behavior, thus achieving the lower electrical resistivity (6.02–6.71 μΩ&#xa0;cm) and higher tensile strength (202.31–239.65&#xa0;MPa). During electrical contacting, Ag/Ti<sub>3</sub>AlC<sub>2</sub> exhibits relatively low contact resistance (approximately 25 mΩ) and breaking arc energy (approximately 1500&#xa0;mJ).</p>

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Effect of Interfacial Behavior on the Performance of Ag/Mn+1AXn (A = Sn, Al, n = 1, 2) Electrical Functional Composites

  • 期刊论文

  • 发表日期：

    2025年2月24日

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  • Chengzhe Wu,
  • Yiqing He,
  • Kaige Zhang,
  • Jianxiang Ding,
  • Yundeng Zhang,
  • Demin Hu,
  • Yaping Wang,
  • Xuelian Wu,
  • Dongming Liu,
  • Long Pan,
  • Jinlong Wang,
  • Feiyong Chen

摘要

MAX phase-reinforced Ag matrix electrical functional composites exhibit potential application in low-voltage appliance due to its excellent conductive and mechanical feature. Previous studies showed that A atomic layer in MAX phase generally reacts with Ag and affects the interfacial structure and overall properties of composites. However, the effect of changing A element and crystal structure of MAX phase on Ag matrix composites have not been explored. In this work, the representative MAX phases, Ti3AlC2, Ti2AlC, and Ti2SnC, wEre chosen to prepare Ag/Mn+1AXn (A = Sn, Al, n = 1, 2) electrical functional composites. For the same 211 structure, Sn layer within Ti2SnC demonstrates a greater susceptibility to temperature induction (800°C/2 h) compared to Ti2AlC, thus facilitating a substantial Sn diffusion with Ag, leading to a notable increase in electrical resistivity (8.65 μΩ cm) and decrease in tensile strength (134.56 MPa). For the same Al element in 211 and 312 structure, Al layer within Ti2AlC and Ti3AlC2 possesses excellent stability to resist high-temperature and has less Ag-Al diffusion behavior, thus achieving the lower electrical resistivity (6.02–6.71 μΩ cm) and higher tensile strength (202.31–239.65 MPa). During electrical contacting, Ag/Ti3AlC2 exhibits relatively low contact resistance (approximately 25 mΩ) and breaking arc energy (approximately 1500 mJ).