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Copyright of Piezoelectrics & Acoustooptics is the property of Piezoelectric & Acoustooptic and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Piezoelectrics & Acoustooptics is the property of Piezoelectric & Acoustooptic and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Single-crystal fiber (SCF) is a fibrous crystalline material, which possesses broad application prospects in the fields of national defense and people's livelihood due to its excellent physical and chemical properties and large aspect ratio. With the maturity and development of the edge-defined film-fed growth technique, laser-heated pedestal growth technique and micro-pulling down technique, SCF ushers in a boom period with various materials and diversified applications. Among them, high melting point oxide SCF for high-temperature sensing has shown great potential for application in harsh environments such as strong oxidation, strong radiation, strong corrosion and strong electromagnetic interference by virtue of its high temperature resistance, oxidation resistance and compact structure. In recent years, researchers have combined optical and acoustic sensing technologies with SCF to broaden the operating temperature of conventional glass fiber sensors while maintaining the structural flexibility, and to compensate for the low lifetime of traditional contact temperature sensing tecniques such as thermocouples in harsh environments. Here, following the development process of the single crystal fiber, the technical characteristics and the research status of the growth techniques as well as the temperature sensing techniques are summarized in detail. [ABSTRACT FROM AUTHOR]

Carbon nanomaterials based sensing technology has become a promising technology in the field of structural health monitoring of composites. Self-sensing composites were achieved with varied sensing elements, including carbon nanotube (CNT) coated fibers (CNTF) and reduced graphene oxide (RGO) coated fibers (RGOF), to compare their sensing performance and mechanism. Piezoresistive response of varied sensors show that RGOF has higher piezoresistive sensitivity and clearly exhibits two-stage behavior from linear to non-linear; whereas, CNTF always exhibits a smooth and orderly electrical signal before fracture occurs. This strong structure-property relationship can be explained by resin infiltration theory. For CNTF, resin molecules can penetrate its porous network structure, forming a complete CNT/resin nanocomposite structure integrated on the fiber surface. In contrast, RGOs with large lateral dimensions and surface consistency can form non-invasive network structure that impedes resin penetration. Further analysis and study show that CNTF is more suitable for long-term monitoring and mechanical state recognition, while RGOF is more practical for the early warning of structural damage.

Copyright of Journal of Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)