Evaluation of the fracture toughness of brittle hardening materials by Vickers indentation

Rickhey, Felix; Marimuthu, Karuppasamy Pandian; Lee, Jin Haeng; Lee, Hyungyil; Hahn, Junhee

doi:10.1016/j.engfracmech.2015.09.028

Cited by 13 publications

(10 citation statements)

References 24 publications

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“…The variation of this mechanical parameter regarding models allows a comparative value, considering that the values of the fracture toughness are low, and indicates that the material is susceptible to failure by mechanical stress. In this sense, there are mathematical models based on computing to describe the fracture mechanisms by indentation method to determine parameter, which considers the variation of the models that have been used for the determination of this mechanical variable [18].…”

Section: Resultsmentioning

confidence: 99%

A PLZT Novel Sensor with Pt Implanted for Biomedical Application: Cardiac Micropulses Detection on Human Skin

González-Morán

Miranda-Hernández

Flores-Cuautle

et al. 2017

Advances in Materials Science and Engineering

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Advances in sensors for biomedical applications have been a great motivation. In this research, a PLZT (lead lanthanum zirconate titanate) novel sensor with platinum wire implanted in its longitudinal section was developed through of the synthesis process based on powder technology. The raw materials as lead (PbO), lanthanum (La2O3), zircon (ZrO2), and titanium (TiO2) were used in the formation of the chemical composition (62.8% PbO, 4.5% La2O3, 24.2% ZrO2, and 8.5% TiO2). Then, these powders were submitted to mix-mechanical milling at high energy; cylindrical samples with the implant of the platinum wire were obtained with the load application. Finally, the compacted samples were sintered at 1200°C for 2 hours, then followed by a polarization potential of 1500 V/mm at 60°C to obtain a novel sensor. The density and porosity were evaluated using the Archimedes’ principle, while the mechanical properties such as fracture toughness value and Young’s modulus were determined by indentation and ultrasonic methods, respectively. A microscopic examination was also carried out to investigate the structural properties of the material. The PLZT novel sensor is electronically arranged for monitoring the cardiac pulses through a data acquisition system. The results obtained in this research are analyzed and discussed.

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Section: Resultsmentioning

confidence: 99%

A PLZT Novel Sensor with Pt Implanted for Biomedical Application: Cardiac Micropulses Detection on Human Skin

González-Morán

Miranda-Hernández

Flores-Cuautle

et al. 2017

Advances in Materials Science and Engineering

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“…Crystalline phase identification was carried out by means of X-ray diffraction (Panalytical X´Pert-PRO) patterns recorded using Cu radiation (λ Cu = 1.54056 Å) at 40 KV and 40 mA, in the range between 15° ≤ 2θ ≤ 100° with a step of 0.02°. The mechanical properties such as hardness and fracture toughness were evaluated by using the indentation method (EMCO-TEST DuraScan 20) [22,23]. Finally, the sintered materials were subjected to a thermal shock resistance test by heating samples to temperatures in the range between 900 and 1400°C (Yamato FO200CR) in intervals of 100°C and subsequent coolling in water at room temperature.…”

Section: Characterization Of Synthesized Materialsmentioning

confidence: 99%

REFRACTORY CERAMICS SYNTHESIS BY SOLID-STATE REACTION BETWEEN CaCO₃ (MOLLUSK SHELL) AND Al₂O₃ POWDERS

Hernández¹,

Ortega-Avilès²,

Herrera-Hernández³

et al. 2018

Ceramics - Silikaty

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Calcium aluminate-based refractory ceramic was developed as an innovative refractory material, using garden snail (Helix aspersa) shells as a natural source of CaCO 3. A 1:1 molar ratio mixture of CaCO 3 from snail shells and commercial Al 2 O 3 powder was prepared by means of high-energy mechanical milling. The mixed powder was compacted in cylindrical samples (disks) and consolidated by sintering at 1450°C and 1500°C for 1h. The density and porosity were evaluated using the Archimedes principle, while the mechanical properties (hardness, fracture toughness, and shear modulus) were determined by indentation and ultrasonic methods, respectively. The thermal shock resistance was tested by heating samples to temperatures between 900 and 1400°C and subsequent quenching in water at room temperature. X-ray diffraction patterns of sintered samples indicate the formation of different calcium aluminate phases, such as CaAl 12 O 19 (krotite/monoclinic), CaAl 4 O 7 (grossite/monoclinic) and CaAl 2 O 4 (hibonite-5H/hexagonal). The fracture toughness and shear modulus values of materials sintered at 1450°C were higher (0.48 MPa•m 1/2 and 59 GPa, respectively) than those of materials sintered at 1500°C (0.43 MPa•m 1/2 and 55 GPa, respectively). Also changes in the bulk density, hardness and thermal shock resistance values were observed in materials sintered at 1450°C and 1500°C.

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“…Methods such as Chevron Notch Beam (CNB) [ [11] , [12] , [13] ], Single-Edge Pre-cracked Beam (SEPB) [ 13 , 14 ], Single Edge Notch Beam (SENB) [ 14 , 15 ], Single Edge V-notch Beam (SEVNB) [ 16 , 17 ], Single Edge Laser Notch Beam (SELNB) [ 18 , 19 ], Double Cantilever Beam (DCB) [ [20] , [21] , [22] , [23] ], Wedge-insert Double Cantilever Beam (WDCB) [ 20 , 22 , 23 ], and End-Loaded Split (ELS) [ 24 , 25 ] are some of these techniques, and many of these methods have been used for many years to determine the K IC or K IFR of materials. In comparison, CFM is based on sharp indenters such as Vickers [ [26] , [27] , [28] , [29] , [30] ], Knoop [ [31] , [32] , [33] ], Berkovich [ 34 , 35 ], and Conical [ 36 ], which are applied to the sample in a certain period and amount of loading and are often used for brittle materials [ 34 , 36 ]. In general, the application of these techniques in the two groups varies according to the material, the manufacturing costs and testing of samples, and the required accuracy [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

“…In general, the application of these techniques in the two groups varies according to the material, the manufacturing costs and testing of samples, and the required accuracy [ 3 ]. However, the use of the IF technique to determine the K IFR of brittle materials, biomaterials, and hard biological tissues is more prevalent [ 26 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Indentation fracture resistance of brittle materials using irregular cracks: A review

Moradkhani,

Panahizadeh,

Hoseinpour

2023

Heliyon

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Evaluation of the fracture toughness of brittle hardening materials by Vickers indentation

Cited by 13 publications

References 24 publications

A PLZT Novel Sensor with Pt Implanted for Biomedical Application: Cardiac Micropulses Detection on Human Skin

A PLZT Novel Sensor with Pt Implanted for Biomedical Application: Cardiac Micropulses Detection on Human Skin

REFRACTORY CERAMICS SYNTHESIS BY SOLID-STATE REACTION BETWEEN CaCO₃ (MOLLUSK SHELL) AND Al₂O₃ POWDERS

Indentation fracture resistance of brittle materials using irregular cracks: A review

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