Mechanical Properties of Functionally Graded Piezoelectric Ceramics by Electrophoretic Deposition Method

2018 ◽  
Vol 2018 (0) ◽  
pp. OS1005
Author(s):  
Toshifumi HATANO ◽  
Yuma BANDO ◽  
Kazuhiro KUSUKAWA ◽  
Tatsuroh KOSAKA
Keyword(s):  
Mechanical Properties ◽  
Electrophoretic Deposition ◽  
Piezoelectric Ceramics ◽  
Functionally Graded ◽  
Deposition Method ◽  
Functionally Graded Piezoelectric

Functionally Graded Piezoelectric Ceramics for Ultrasonic Transducers

2007 ◽  
Vol 336-338 ◽  
pp. 2609-2612
Author(s):  
Deng Ren Jin ◽  
Zhong Yan Meng ◽  
Wen Biao Wu ◽  
Bing Qin
Keyword(s):  
Lead Zirconate Titanate ◽  
Piezoelectric Ceramics ◽  
Impedance Analysis ◽  
Lead Zirconate ◽  
Functionally Graded ◽  
Ultrasonic Transducers ◽  
Frequency Bandwidth ◽  
Gradient Distribution ◽  
Structural And Electrical Properties ◽  
Functionally Graded Piezoelectric

Functionally graded piezoelectric ceramics (FGM) plates are attractive due to their ability to broaden the frequency bandwidth of the ultrasonic transducers. A resistivity gradient La-doped Lead Zirconate Titanate/Al-doped Zinc Oxide (La-PZT/Al-ZnO) piezoelectric ceramics plate was developed using a powder metallurgical process. Grading of the piezoelectric modulus across the plate was experimentally confirmed by the electrical impedance analysis and its gradient distribution was characterized using the profile-technique. The distribution of Zn2+ ions in the PZT region was examined using EPMA, XRD and SEM/EDX, respectively. Analysis results show that the gradient distributions of structural and electrical properties inside the FGM plate are mainly caused by the diffusion and aggregation of Zn2+ ions in the PZT layer. The functionally graded piezoelectric ceramics plate presented here will be useful for broadening the frequency bandwidth of piezoelectric transducers.

Interface Formation of Unidirectional SiCf/SiC Composites by Electrophoretic Deposition Method

2014 ◽  
Vol 617 ◽  
pp. 213-216 ◽  
Author(s):  
Katsumi Yoshida ◽  
Hiroyuki Akimoto ◽  
Akihiro Yamauchi ◽  
Toyohiko Yano ◽  
Masaki Kotani ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Ductile Fracture ◽  
Electrophoretic Deposition ◽  
Fracture Behavior ◽  
Deposition Method ◽  
Interface Formation ◽  
Fiber Pullout ◽  
Sic Fibers ◽  
Sintering Additives ◽  
Sic Composites

C-and BN-interphases on SiC fibers for unidirectional SiCf/SiC composites were formed by EPD process, and their microstructure and mechanical properties were investigated. Whereas the C-SiCf/SiC composites showed a pseudo-ductile fracture behavior with large amount of fiber pullout, the BN-SiCf/SiC composites fractured in a brittle manner without fiber pullout in spite of sufficient thickness of BN interphase. It is inferred from the results of EDS that sintering additives would react with h-BN-interphase, and the interphase did not act effectively for toughening the SiCf/SiC composites.

Development of Carbon Nanotube - Reinforced Silk and Cannabis Fibers by an Electrophoretic Deposition Method

2011 ◽  
Vol 695 ◽  
pp. 377-380
Author(s):  
Somjate Veingnon ◽  
Yaowamarn Chuminjak ◽  
Tewasin Kumpika ◽  
Pisith Singjai
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Electrophoretic Deposition ◽  
Cannabis Sativa ◽  
Natural Fibers ◽  
Break Point ◽  
Deposition Method ◽  
Hemp Fibers ◽  
Carboxylic Acid Groups ◽  
Mixed Acids

Carbon nanotubes (CNTs) were deposited by electrophoretic deposition (EPD) onBombyx mori(silk) andCannabis sativa L. var.sativa (hemp) fibers to improve their mechanical properties. The CNTs were functionalized in mixed acids in order to introduce carboxylic acid groups on their surfaces. The tensile strength and strain at break point of both the modified fibers were approximately two times higher than those of the virgin natural fibers. The addition of small amounts of Mg(NO3)2.6H2O, (CH3COO)2Ni.4H2O significantly improved the deposition of the functionalized CNTs on the hemp fibers.

Functionally Graded Piezoelectric Ceramics

1999 ◽  
Vol 308-311 ◽  
pp. 515-520 ◽  
Author(s):  
William F. Shelley II ◽  
S. Wan ◽  
Keith J. Bowman
Keyword(s):  
Piezoelectric Ceramics ◽  
Functionally Graded ◽  
Functionally Graded Piezoelectric

Mechanical Properties of Alumina/Zirconia Functionally Graded Material Prepared by Electrophoretic Deposition

2005 ◽  
Vol 290 ◽  
pp. 332-335 ◽  
Author(s):  
Pavol Hvizdoš ◽  
José-Maria Calderón Moreno ◽  
Jan Očenášek ◽  
Luca Ceseracciu ◽  
Guy Anné
Keyword(s):  
Mechanical Properties ◽  
Electrophoretic Deposition ◽  
Cross Sections ◽  
Functionally Graded Material ◽  
Element Model ◽  
Functionally Graded ◽  
Graded Material ◽  
The Difference ◽  
Indentation Methods ◽  
Thermal Expansion Coefficient Mismatch

The mechanical properties of a quasi-symmetrical planar functionally graded material (FGM) of Al2O3 / Al2O3+20%ZrO2 / Al2O3+5%ZrO2 prepared by electrophoretic deposition and pressureless sintering has been studied. Hardness and fracture toughness were measured using indentation methods on cross sections of samples. From the difference between lengths of cracks parallel and perpendicular to layers the residual stresses (arisen due to the thermal expansion coefficient mismatch) were calculated, their profile along the cross section has been estimated and compared with values obtained using a finite element model.

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