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

• Published in: Rare metals Vol. 35; no. 10; pp. 784 - 789
• Main Authors: Zhou, Jia, Zhu, Zheng-Hou, Li, Xiao-Min, Du, Kang, Qiao, Bao-Ying, Fu, Yuan
• Format: Journal Article
• Language: English
• Published: Beijing Nonferrous Metals Society of China 01.10.2016; Springer Nature B.V
• Subjects: Biomaterials; Chemistry and Materials Science; Digital; Energy; Heat treatment; Impedance; Materials Engineering; Materials Science; Metallic Materials; Microcomputers; Nanoscale Science and Technology; Optimization; Physical Chemistry; Silicon; Silicone rubber; Stresses; 卸载过程; 压力试验机; 复合薄膜; 性能; 敏感特性; 硅橡胶; 磁粉; 粉末制备; Stress-impedance effect; Force-sensitive properties; Composite films
• ISSN: 1001-0521; 1867-7185
• DOI: 10.1007/s12598-014-0277-4

Composite films of different contents were prepared by Fe73.5Cu1Nb3Si13.5B9 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 ℃. Composite film which was prepared by this kind of powder has a good force-sensitive property.