Force-sensitive properties of FeCuNbSiB powder/silicone rubber composite films

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• 作者：Jia Zhou ; Zheng-Hou Zhu ; Xiao-Min Li ; Kang Du ; Bao-Ying Qiao ; Yuan Fu
• 关键词：Composite films ; Stress ; impedance effect ; Force ; sensitive properties
• 刊名：Rare Metals
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：35
• 期：10
• 页码：784-789
• 全文大小：1,282 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Metallic Materials
  Chinese Library of Science
  
• 出版者：Journal Publishing Center of University of Science and Technology Beijing, in co-publication with Sp
• ISSN：1867-7185
• 卷排序：35

文摘

Composite films of different contents were prepared by Fe_73.5Cu₁Nb₃Si_13.5B₉ powder as compound phase and silicone rubber as matrix phase. The thickness of film is 200 μm. Values of impedance, Z, under pressure stress were measured by TH2816LCR digital bridge. LYYL-500N high-grade-type microcomputer control pressure testing machine was used to conduct program control loading with a speed of 0.1 mm·min−1. The results show that composite films of different contents (25 vol%, 30 vol%, and 35 vol%) have excellent force-sensitive properties in both loading process and unloading process, especially when the stress is below 0.2 MPa, the stress–impedance (SI) and |k| values of composite films are much higher than that in the range of 0.2–1.0 MPa. The force-sensitive properties of loading process are superior to unloading process. While the frequency is 1 kHz, the force-sensitive properties of composite films are better than 50 kHz. The optimal temperature of powder heat treatment is 500 °C. Composite film which was prepared by this kind of powder has a good force-sensitive property.