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| High Damping SiO2Coated LiNbO3 Particles Reinforced ZL102 Composites and Piezo-damping Features |
| WENG Wei,WANG Haowei,MA Naiheng |
| (State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, Shanghai 200240, China) |
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Abstract LiNbO3 piezoelectric particles of high Curie point coated by SiO2 via solgel method were used and then LiNbO3(SiO2)/ZL102composites were fabricated through pressure infiltration. Damping properties from 30 °C to 350 °C were measured by dynamic mechanical thermal analyzer (DMTA). The results reveal that the damping capacity of LiNbO3(SiO2)/ZL102 composite is three times the value of ZL102 alloy and two times as high as LiNbO3/ZL102 composite at 30 °C. And with increasing temperature the damping capacities of three types of materials increase together and gradually become close. In the present paper, piezo-damping was achieved by using poled LiNbO3 piezoelectric particles. Moreover, the piezodamping was enhanced by SiO2 coatings, which changed the resistivity around LiNbO3 particles.
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Received: 10 May 2009
Published: 31 May 2010
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| [1] |
CHEN Zhijun1,2，YANG Chunli1，WU Xiusheng1，LIU Wei1. [J]. J. Shanghai Jiaotong Univ.(Sci.) , 2010, 44(05): 692-0696. |
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