Non-Destructive Strength Characterization of Full-Wafer Bonds: A Modified Blister Test Method Enables a Controlled Crack Formation at the Bond Interface

Non-destructive testing techniques are widely used for testing ceramic materials. In our studies, two different types of ultrasonic test methods (A-scan and C-Scan) were investigated as non-destructive testing methods for characterization of porcelain tiles. Tiles were sintered in different temperatures to change their porosity and density properties. By changing of ultrasonic time and velocity related with samples’ some physical properties (such as bulk density, apparent density, apparent porosity (%), water absorption (%)) inspected via contact A-scan ultrasonic test method. The results show that without necessity of traditional test methods, some physical properties of ceramics can be determined by using obtained ultrasonic velocity-bulk density, apparent density, apparent porosity (%) and water absorption (%) calibration plots. Additionally, various defects were inspected in samples by using water immersion ultrasonic C-scan method. These results supported this study to obtain the information about defects’ size and place in the ceramic tiles. To support this non-destructive method results scanning electron microscope (SEM) characterization was done and images give the information about the place of the defect.

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Zerstörungsfreie Haftfestigkeitscharakterisierung von Full-Wafer-Bondverbindungen (Non-destructive strength characterization of full-wafer-bonds)

tm - Technisches Messen ◽

10.1524/teme.2006.73.1.43 ◽

2006 ◽

Vol 73 (1/2006) ◽

Cited By ~ 1

Author(s):

Martin Rabold ◽

Alexander Doll ◽

Michael Kröner ◽

Frank Goldschmidtböing ◽

Peter Woias

Keyword(s):

Strength Characterization ◽

Non Destructive

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Microwave Characterization of Cement Hydration

MRS Proceedings ◽

10.1557/proc-245-253 ◽

1991 ◽

Vol 245 ◽

Author(s):

M. Moukwa ◽

M. Brodwin ◽

S. Christo ◽

J. Chang ◽

S.P. Shah

Keyword(s):

Cement Hydration ◽

Bound Water ◽

Front Surface ◽

Cementitious Materials ◽

Test Method ◽

Surface Reflection ◽

Microwave Characterization ◽

Curing Period ◽

Non Destructive

ABSTRACTConductivity and permittivity of cements were measured during the first 24 h hydration period at 10.0 GHz using front surface reflection methods. Data trends closely followed the hypothesis that the microwave results responded to the transition from free to bound water as hydration proceeded. The results were also compared to measured hydration curves and changes in the slope of the data versus time correlated well with characteristics regions of the hydration curve. The results establish the usefulness of microwave characterization for the study of chemistry and structure during the hydration period and may lead to a non destructive test method for cementitious materials during the early curing period.

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Non-destructive strength characterization of concrete using surface waves

NDT & E International ◽

10.1016/s0963-8695(99)00028-6 ◽

2000 ◽

Vol 33 (1) ◽

pp. 1-6 ◽

Cited By ~ 48

Author(s):

T. Gudra ◽

B. Stawiski

Keyword(s):

Surface Waves ◽

Strength Characterization ◽

Non Destructive

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