Smart material

About: Smart material is a research topic. Over the lifetime, 3704 publications have been published within this topic receiving 74280 citations. The topic is also known as: intelligent material & responsive material.

Smart Composites With Short Ferromagnetic Microwires for Microwave Applications

Abstract: Smart composites with short-cut Co68.7Fe4Ni1B13Si11Mo2.3 microwires were prepared and studied in terms of their microwave tunable properties. It is shown that the frequency dependence of effective permittivity relaxes with the application of magnetic field till around the anisotropy field of the microwire due to the increase of internal losses. There exists a significant field tunable effect in the transmission and reflection spectra, featured as a resonance-relaxation transformation; a step-like shift of reflection phase was also observed with increasing applied magnetic field, which can be exploited especially for the sensing applications such as field/stress monitoring. Notably, with increasing microwire concentration from 0.06 cm-2 to 0.24 cm-2 , the microwave absorption is more than doubled; the reflection phase shift corresponding to the magnetic field change from 500 to 1000 A/m is also increased from 1.2 to 1.3. These results indicate that the developed short-wire composites have the potential for microwave absorption and remote sensing applications.

Use of smart materials technologies in radiation environments and nuclear industry

Abstract: Application of smart materials technology in nuclear industry offer new opportunities in this industrial sector for safety enhancement, reduced personal exposure, life-cycle cost reduction, and performance improvement. However, the radiation environments associated with nuclear operations represent a unique challenge to the testing, qualification and use of smart materials. The present study assesses the physical limitations of smart materials applications to nuclear industry and identifies areas of where such technologies could be reliably used. In our investigation, we considered a spectrum of smart materials technologies and a variety of irradiation environments. A literature survey to identify prior experimental data related to irradiation effects on smart-materials showed significant irradiation induced alterations in performance. However, the available database was limited and additional tests will be required before smart materials technologies can be introduced in most radiation environments. This paper summarizes a test program that was developed for the Accelerator Production of Tritium project. This program was designed to identify specific irradiation areas where the application of smart materials technologies is practical.

Conductivity hydrogels composite material sensitized to humidity variation and preparation thereof

Abstract: The invention discloses a conductive hydrogel composite material which is sensitive to humidity level fluctuation, a device and a preparation method, which relates to a smart material and a device and a preparation method, wherein, the conductive hydrogel composite material and the preparation method thereof comprises four steps of dispersion of conductive filling materials, in situ polymerization, casting to be shaped and electrode trimming; the conductive hydrogel composite material and the device comprise a hydrogel which is sensitive to humidity level fluctuation, the conductive filling materials and an additive. In the process of responding to the environmental moisture change, the obtained conductive hydrogel composite material and the device can make a sensitive response to the external moisture change. The conductive hydrogel composite material and the device can obtain practical applications in the fields of biomedicine, fluid control, diffusion and permeation, intelligent machinery and the like.