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A Fiber Optic Temperature Sensor Based on the Combination of Epoxy and glass particles With Different Thermo-Optic Coefficients

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Photonic Sensors 2016年第4期6卷 295-302页

作者： Wolfgang WILDNER Dietmar DRUMMER Institute of Polymer Technology Friedrich-Alexander-University Erlangen-Niirnberg Erlangen Germany

This paper describes the development and function of an optical fiber temperature sensor made out of a compound of epoxy and optical glass particles. Because of the different thermo-optic coefficients of these materials, this compound exhibits a strong wavelength and temperature dependent optical transmission, and it therefore can be employed for fiber optic temperature measurements. The temperature at the sensor, which is integrated into a polymer optical fiber （POF）, is evaluated by the ratio of the transmitted intensity of two different light-emitting diodes （LED） with a wavelength of 460nm and 650rim. The material characterization and influences of different sensor lengths and two particle sizes on the measurement result are discussed. The temperature dependency of the transmission increases with smaller particles and with increasing sensor length. With glass particles with a diameter of 43 Bm and a sensor length of 9.8 mm, the intensity ratio of the two LEDs decreases by 60% within a temperature change from 10℃ to 40℃.

关键词： Temperature sensors fiber optic sensors epoxy glass particles thermo-optic coefficient

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Effect of ECAP consolidation temperature on the microstructure and mechanical properties of Al-Cu-Ti metallic glass reinforced aluminum matrix composite

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Journal of Materials Science & Technology 2017年第9期33卷 1031-1038页

作者： M.R.Rezaei S.G.Shabestari S.H.Razavi School of Metallurgy and Materials Engineering Iran University of Science and Technology (IUST) Center of Excellence for High Strength Alloys Technology (CEHSAT) School of Metallurgy and Materials EngineeringIran University of Science and Technology (IUST)

Al;Cu;Ti;metallic glass（AMG） reinforced Al matrix composites were consolidated by equal channel angular pressing（ECAP） process. The effects of ECAP consolidation temperature ranging from room temperature to just below the first crystallization temperature of metallic glass on the consolidation of composites were investigated in terms of the relative densities, structural evolutions and mechanical properties of composites. Some intermetallic compounds included Al;CuTi;, Al;Ti and Al;Cu;precipitated from metallic glass particles at consolidation temperature of 300?C. Consolidation temperature did not affect the matrix grains size of the composite. Quantitative analysis revealed that the distribution of reinforcing particles was considerably dependent on consolidation temperature. Density of the composite was increased by increasing the consolidation temperature to 250?C. The composite consolidated at250?C through ECAP process, exhibited the best combination of yield strength and ductility of 184 MPa and 48%, respectively.

关键词： Al matrix composite(AMC) Equal channel angular pressing(ECAP) Consolidation temperature glass particles

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