硅橡胶压磁复合材料力学性能纳米压痕实验研究

Mechanical properties of silicone-rubber-matrix piezomagnetic composites characterized by nanoindentation test

  • 摘要: 通过纳米压痕测试技术对非晶Fe73.5Cu1Nb3Si13.5B9/硅橡胶压磁复合材料薄膜的力学性能进行了研究, 讨论了加载速率、 保载时间、 峰值载荷等试验参数对模量和硬度测试结果的影响。进一步分析了纳米压痕实验表征非晶Fe73.5Cu1Nb3Si13.5B9/硅橡胶压磁复合材料薄膜蠕变行为的可行性, 通过合理确定压痕蠕变实验参数, 获得该材料的蠕变应力指数。结果表明: 相对峰值载荷, 加载速率对测试结果影响更为显著, 而保载时间对硬度和模量测试结果几乎没有影响。

     

    Abstract: The mechanical properties of amorphous Fe73.5Cu1Nb3Si13.5B9 alloy powders/silicone rubber piezomagnetic composite film were investigated by the nanoindentation technique. The mechanical responses (hardness and modulus) of the piezomagnetic composite film were obtained by changing the loading rates, peak load and holding time. And the effect of these experimental parameters on nanoindentation measurement was discussed. The reasonable experimental parameters were determined and the creep stress exponent equating was acquired by indentation creep experiments. The feasibility analysis was performed to evaluate the creep behavior of amorphous Fe73.5Cu1Nb3Si13.5B9 alloy powders/silicone rubber piezomagnetic composites film by using nanoindentation technology. The results show that the modulus and hardness of the thin film respond more sensitively to the loading rates than do to the peak load. The experimental result is hardly affected by the holding time.

     

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