Effect of polarization on fracture toughness of BaTiO3/Al2O3 composites

Rattanachan, Sirirat; Miyashita, Yukio; Mutoh, Yoshiharu

doi:10.1016/s0955-2219(03)00319-4

Cited by 19 publications

(8 citation statements)

References 17 publications

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“…The effects of BaTiO 3 piezoelectric phase on the fracture toughness and tensile strength of BaTiO 3 /Al 2 O 3 and BaTiO 3 /Al composites have been studied in previous works. It is reported that the fracture toughness of BaTiO 3 /Al 2 O 3 could be improved [13,14] and the tensile strength of BaTiO 3 /Al composite is 42% higher than that of Al-matrix [4]. In this study, the effect of BaTiO 3 particles on the mechanical properties was also investigated.…”

Section: Resultsmentioning

confidence: 89%

“…As the crystallite size of BaTiO 3 powder reduced to the nanoscale, multiphase coexistence will occur. For example, the cubic phase was observed and there is even a coexistence of hexagonal and tetragonal phases in BaTiO 3 nanoparticle with a size of 40 nm at room temperature [10,11,13]. Owing to the piezoelectric effect of the piezo-damping, the reinforcement results on the damping capacities of 1000 nm BaTiO 3 is more favourable.…”

Section: Resultsmentioning

confidence: 99%

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A study on the damping capacity of BaTiO3-reinforced Al-matrix composites

Xiao

2016

Bull Mater Sci

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To study the damping capacity of BaTiO 3 /Al composites, Al composites reinforced with BaTiO 3 powder (average grain sizes: 100 and 1000 nm) were fabricated by the hot-pressing sintering method. The damping properties of pure Al and BaTiO 3 /Al composites were investigated and compared based on the dynamic mechanical analysis over a wide range of temperatures (50-285 • C). Compared with pure Al matrix, 1000 nm BaTiO 3 /Al composites with 5 and 10% mass fractions of BaTiO 3 exhibited better damping capacity. For 100 nm BaTiO 3 /Al composite, its damping capacity is slightly higher than that of pure Al below 145 • C, while it becomes lower above this degree. The damping capacity enhancement of BaTiO 3 /Al composites can be explained by the ferroelastic domain damping. Furthermore, 5 and 10% BaTiO 3 /Al composites have higher bending strength and hardness than pure Al sample.

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Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 99%

A study on the damping capacity of BaTiO3-reinforced Al-matrix composites

Xiao

2016

Bull Mater Sci

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“…Piezoceramic materials suffer by inherent brittleness, which is usually one order lower as compared to the structural ceramics. Also, changes of mechanical properties during poling and/or after the application of electric field were reported [8][9][10].…”

Section: Piezoceramic Materialsmentioning

confidence: 99%

Electro-mechanical analysis of a multilayer piezoelectric cantilever energy harvester upon harmonic vibrations

et al. 2018

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This paper addresses an important issue of the individual layer thickness influence in a multilayer piezo composite on electro-mechanical energy conversion. The use of energy harvesting systems seems to be very promising for applications such as ultra-low power electronics, sensors and wireless communication. The energy converters are often disabled due to a failure of the piezo layer caused by an excessive deformation/stresses occurring upon the operation. It is thus desirable to increase both reliability and efficiency of the electromechanical conversion as compared to standard concepts. The proposed model of the piezoelectric vibration energy harvester is based on a multilayer beam design with active piezo and protective ceramic layers. This paper presents results of a comparative study of an analytical and numerical approach used for the electro-mechanical simulations of the multilayer energy harvesting systems. Development of the functional analytical model is crucial for the further optimization of new (smart material based) energy harvesting systems, since it provides much faster response than the numerical model.

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“…A number of reports address the bonding at the interface between α-Al 2 O 3 and aluminum [10][11][12] . In addition, interfacial bonding 22,23) . These imply that the lattice matching of α-Al 2 O 3 with BaTiO 3 or the certain other phases is higher than that of γ-Al 2 O 3 .…”

Section: Delaminated Surfacementioning

confidence: 99%

Effect of Joining Conditions on the Shear Strength of Barium Titanate Joint Brazed with Molten Aluminum

2017

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The shear tests using barium titanate joint brazed with molten aluminum under several joining conditions were conducted to determine the optimum joining condition. The barium titanate joints brazed at 780 C had estimative strength, while those brazed at 720 C did not. The strengths of the joints brazed at 780 C became higher with increase in the heat holding time. Especially, the heat holding time for more than 24 h gave higher joint strength than the original shear strength of barium titanate. To discuss the bonding mechanism, the fractured surfaces of the joints were observed and the cross-sectional element distributions in the vicinity of the joint interface were investigated. The observations demonstrated that pieces and grains of the fractured barium titanate were strongly bonded to the aluminum layer at longer holding times. Meanwhile, from the oxygen distributions, relatively thick alumina layers that formed between barium titanate and aluminum at longer holding times were observed. These facts suggest that interfacial bonding is achieved through the formation of an alumina interlayer due to progressive oxidation of molten aluminum during joining process.

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Effect of polarization on fracture toughness of BaTiO3/Al2O3 composites

Cited by 19 publications

References 17 publications

A study on the damping capacity of BaTiO3-reinforced Al-matrix composites

A study on the damping capacity of BaTiO3-reinforced Al-matrix composites

Electro-mechanical analysis of a multilayer piezoelectric cantilever energy harvester upon harmonic vibrations

Effect of Joining Conditions on the Shear Strength of Barium Titanate Joint Brazed with Molten Aluminum

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