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BaTiO_3_Cu复合材料的制备和性能研究_肖长江

第43卷第11期

人工晶体学报Vol.43No.112014年11月JOURNAL OF SYNTHETIC CRYSTALS November ,2014

BaTiO 3/Cu 复合材料的制备和性能研究

肖长江,栗正新,朱玲艳,张恒涛

(河南工业大学材料科学与工程学院,郑州450007)

摘要:以Cu 为基体,100nm 的BaTiO 3颗粒为增强材料,用热压烧结的方法制备了BaTiO 3/Cu 复合材料,对其微观

结构和性能进行了研究。结果表明:当BaTiO 3颗粒的加入量为5vol%时,复合材料的微观结构均匀;BaTiO 3颗粒的

加入量增加到10vol%时,

在复合材料中有颗粒团聚体存在。BaTiO 3颗粒的加入对BaTiO 3/Cu 复合材料的硬度影响不大,但能提高其抗弯强度。强度提高的原因是BaTiO 3颗粒能阻止位错的移动。动态力学性能检测结果表明:BaTiO 3/Cu 复合材料的阻尼损耗因子值有较大的提高,而储存模量有较大的下降。BaTiO 3颗粒的加入量为5vol%

时,BaTiO 3/Cu 复合材料的阻尼增强效果最佳。BaTiO 3/Cu 复合材料的阻尼机理可能包括位错阻尼、晶界阻尼、界面阻尼、压电阻尼和压电-导电耗散机制的协同效应.

关键词:铜基复合材料;BaTiO 3;热压烧结;力学性能;阻尼

中图分类号:TB333文献标识码:A 文章编号:1000-

985X (2014)11-2976-06Study on Preparation and Properties of BaTiO 3/Cu Composites

XIAO Chang-jiang ,LI Zheng-xin ,ZHU Ling-yan ,ZHANG Heng-tao

(School of Material Science and Engineering ,Henan University of Technology ,Zhengzhou 450001,China )

(Received 20June 2014,accepted 4August 2014)

Abstract :BaTiO 3/Cu composites were prepared by a hot pressing method using Cu as matrix ,BaTiO 3particles with a particle size of 100nm as reinforcements.The microstructure and properties of BaTiO 3/Cu composites were studied.The results show that :when the amount of BaTiO 3particle is 5vol%,the microstructure of composites is uniform.When the adding amount of BaTiO 3particle is up to 10vol%,BaTiO 3aggregates in composites exist.The adding of BaTiO 3particle has little effect on the hardness but can improve the flexural strength of composites.Reason for increasing the flexural strength is that adding BaTiO 3particles can prevent the movement of dislocations.The test results of dynamic mechanical properties show that damping loss factor of BaTiO 3/Cu composite value is significantly improved and the storage modulus composite has a larger decrease.Damping enhancement effect of 5vol%BaTiO 3is better than that of 10%BaTiO 3.The damping mechanism of BaTiO 3/Cu composite may be synergistic effects including dislocation damping ,boundary damping ,interface damping ,piezoelectric damping ,piezoelectric and conductive dissipation mechanism.

Key words :Cu matrix composite ;barium titanate ;hot pressing sintering ;mechanical property ;damping 收稿日期:2014-

06-20;修订日期:2014-08-04基金项目:河南省科技攻关计划项目(142102210406)

作者简介:肖长江(1969-),湖南省人,博士,副教授。E-mail :cjxiao@haut.edu.cn 1引言

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