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Effect of graphite particle size on wear property of graphite and Al2O3 reinforced AZ91D-0.8%Ce composites ZHANG Mei-juan(张美娟), LIU Yong-bing(刘勇兵), YANG Xiao-hong(杨晓红), AN Jian(安 健), LUO Ke... property of the composites, were performed under the condition of constant contents of graphite particles and Al2O3 short fibers. The results reveal that the grain size of the composites changes less when......
Effect of hot plastic deformation on microstructure and mechanical property of Mg-Mn-Ce magnesium alloy JIAN Wei-wei(简炜炜), KANG Zhi-xin(康志新), LI Yuan-yuan(李元元) School of Mechanical Engineering.... The mechanism of microstructural evolution and the relationship between microstructure and mechanical property of Mg-Mn-Ce magnesium alloy processed by this solid die were also analyzed. Key words......
) and piezoelectric constant d33 with density of No.1-4 sample 图3 不同刮刀高度下压电厚膜的SEM像以及不同刮刀高度下的压电陶瓷断面BSED图 Fig. 3 SEM images of piezoelectric thick film with different blade heights((a)-(c)) and BSED diagrams of piezoelectric ceramic section with different blade heights((d)-(f)) 图4 刮刀高度对样品压电常数d33与致密度的影响 Fig. 4 Effect of blade height to piezoelectric constant d33 and density of samples 2.3......
[20, 22],本文设计的叠堆式压电单元由压电陶瓷PZT-5H,铜箔电极,双组分环氧树脂胶,铜导线等组成,采用嘉康电子提供的电极黏结法制备工艺组装[22],制备工艺流程如图1所示. 图1 叠堆式压电单元制备工艺 Fig. 1 Preparation process of stacked piezoelectric units 实际上,压电材料参数变异,层间黏结工艺,电极连接方式等均会显著影响压电... mm,厚度为4 mm的PZT-5H圆环并联组成.此外,为避免车辆冲击作用损坏压电单元,本文采取了在单元两端粘贴相同横截面的未极化陶瓷的方式,以降低单元结构失效风险. 表2 路用叠堆式压电单元结构参数 Table 2 Structure parameters of stacked piezoelectric units 3 路用叠堆式压电单元压电性能影响分析 本文采用MTS810力学......
Intrinsic Orientation Effect on the Piezoelectric Response of Multi-domain 0.26Pb(In1/2Nb1/2)O3–0.46Pb(Mg1/3Nb2/3)O3– 0.28PbTiO3 Crystals项阳,CHEN ChuanwenCollege of Information Science and Engineering, Huaqiao University(Xiamen)摘 要:The crystal intrinsic orientation effect on the piezoelectric response of multi-domain 0.26Pb(In1/2Nb1/2)O3–0.46Pb......
with (0001) basal plane parallel to the rolling surface. The mechanical property tests show that the activity of <> twinning during compression exerts significant effect on the tensile-compressive... magnesium alloys; texture; mechanical property 镁合金具有低密度,高强度,易回收等优点,近年来作为轻质结构材料被......
得到高电阻率,在无耦合剂条件下,够保证测试重复性[18].图5所示为超声压电收发器的结构.在室温真空环境下,首先,在M8×30 mm和M8×50 mm这2种研磨过的45号钢螺栓顶面上制备厚度大于1 μm的ZnO薄膜；然后,按版图制作金属电极.图6所示为制备ZnO压电薄膜后的螺栓样品. 图5 超声压电收发器的结构 Fig. 5 Structure of piezoelectric transceiver for ultrasound 图6 ZnO压电薄膜成品实物 Fig. 6 Photographs of ZnO piezoelectric films 2.2 声弹性应力实验测量 设计实验测试螺栓声弹性应力测量的准确度,图7所示为实验的结构图.首先,在螺栓与支撑面之间增加垫圈式力传感器,连接电源与数字多用表测量应力,力传感器测量准确度为0.5%.然后,测量超声在螺栓轴向的传播时间.测量传......
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Phase Structure, Microstructure and Electrical Properties of KxNa(1-x)NbO3 Piezoelectric Ceramics with Different K/Na Ratio陈建超1,2,WU Wei1,SU Shi1,YU Jishun3,LEI Xinrong2,赵培11. Key Laboratory...">The KxNa(1-x)NbO3(x=0.45, 0.46, 0.47, 0.48, 0.49, 0.50) lead-free piezoelectric ceramics was fabricated by conventional solid-state sintering method. It was found that the ratio of alkaline metal......
. It has advantages of large vibrating amplitude, high energy conversion efficiency and compact structure. The working principle of the piezoelectric ring vibrating gyroscope is based on the inertia...; piezoelectric gyroscope; side drive; ring vibrating gyroscope 1 Introduction Solid-state wave gyroscope is one kind of high-performance vibrating gyroscopes. The principle of the solid-state wave gyroscope......
