Assessment of the adhesion quality of fusion-welded silicon wafers with nonlinear ultrasound

Wegner, Anna; Koka, Ashraf; Janser, K.; Netzelmann, U.; Hirsekorn, S.; Arnold, W.

doi:10.1016/s0041-624x(99)00096-7

Cited by 37 publications

(15 citation statements)

References 6 publications

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“…The spring model mentioned above provides an idea to use ultrasonic wave as a tool to test the adhesion quality of interface, since the ultrasonic wave is one kind of mechanical wave. A. Wegner [14] believes the an-harmonic wave is caused by weak bonds and manifests itself at high dynamic strains exerted by the ultrasonic waves, and proposed a distortion factor as a quantitative index for characterizing the adhesion quality of fusion-welded silicon wafers. L. Czarnecki [15] mainly uses the changes of a mean square value parameter (MS) and the value of variation coefficient (CV) of MS to characterize the propagation of ultrasonic waves through the polymer coating and concrete substrate system.…”

Section: Introductionmentioning

confidence: 99%

Research on Ultrasonic Testing Methods for Adhesion Quality of Ceramic Coatings

Han

Chen

2017

MATEC Web Conf.

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Abstract. Ceramic coatings are widely used in aerospace field as thermal barrier materials for their high-temperature performance. The adhesion quality of ceramic coatings on metallic substrate is an important index for coating performance. The uniformity of coating thickness is also important since it determines the thermal stresses in the coatings, which means the coating performance is closely related with the uniformity. The reflection characteristic of the coating-substrate interface is an essential factor for evaluating the adhesion quality. Since the acoustic impedance of ceramic coatings is very close to that of substrate, it is not easy t o distinguish their reflection wave in the received waves. In this paper, the propagation characteristics of ultrasonic wave in coatings with different thicknesses on the substrate were researched using immersion ultrasonic testing with pulse-echo method. An algorithm based on the amplitude and phase of reflection waves was proposed for the evaluation of adhesive quality. The results show that, pulse-echo method is highly reliable for the measurement of coating thickness and that the algorithm is effective for the evaluation of adhesion quality of ceramic coatings.

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Section: Introductionmentioning

confidence: 99%

Research on Ultrasonic Testing Methods for Adhesion Quality of Ceramic Coatings

Han

Chen

2017

MATEC Web Conf.

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“…Nondestructive testing techniques (NDT) such as ultrasonics, eddy current, thermography, etc., are commonly used for the inspection of the adhesion of joined materials [4]. Among them, ultrasound is one of the most attractive techniques for monitoring the adhesive bonding.…”

Section: Introductionmentioning

confidence: 99%

“…Biwa et al [11] reported that the values of normal and tangential interfacial stiffness of the contacting interfaces are functions of the frequency as well as the contact pressure. Wegner et al [4] presented an ultrasonic technique to monitor the quality of the diffusion bond silicon wafer by measuring the anharmonic content of a transmitted ultrasonic wave. Lavrentyev and Beals [12] studied the feasibility of ultrasonic measurement of the diffusion bond strength between two steel blocks by correlating the interfacial stiffness measured ultrasonically to the mechanically measured bond strength.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Adhesive Bond Strength Using the Ultrasonic Technique

Her

Lin

2014

The Journal of Adhesion

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The ultrasonic technique is one of the most promising methods to nondestructively evaluate the interface. When the adhesive bonding is not perfect, part of ultrasonic energy is reflected from the interface. The reflection signal can be used to estimate the adhesive strength. In this investigation, a spectral analysis is employed using Fast Fourier Transform (FFT) to evaluate the reflection signal in frequency domain. The frequency spectrum of the reflection signal is then deconvolved with a reference signal taken from the bottom of the test block to determine the interfacial stiffness which can provide useful information on the nature of the adhesive interface. In this work, two aluminum blocks are adhesively bonded with the epoxy. The adhesive bond strength measured by a tensile testing is correlated with the interfacial stiffness. Experimental results show that the adhesive bond strength is linearly increasing with the increase in interfacial stiffness. It demonstrates that the adhesive bond strength can be characterized using the single parameter of interfacial stiffness. The present study reveals the feasibility of assessing the adhesive bond strength with the ultrasonic technique.

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“…This effect is known as the contact acoustic nonlinearity (CAN), and it has been the topic of much research work concerning the characterization of closed cracks or imperfect bond interfaces [1]. Earlier theoretical investigations [2][3][4] predicted that a weak or incompletely bonded interface will generate high second harmonics when subjected to sufficiently intense acoustic energy, and previous experiments have indicated that acoustic harmonic generation occurs on various types of interface, such as unbounded interfaces [5] microstructural changes [6][7][8][9], cracks [10][11][12] and adhesive joints [13,14].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Time Reversal Focusing and Detection of Fatigue Crack

Jeong

Barnard²

2012

Journal of the Korean Society for Nondestructive Testing

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This paper presents an experimental study on the detection and location of nonlinear scattering source due to the presence of fatigue crack in a laboratory specimen. The proposed technique is based on a combination of nonlinear elastic wave spectroscopy(NEWS) and time reversal(TR) focusing approach. In order to focus on the nonlinear scattering position due to the fatigue crack, we employed only one transmitting transducer and one receiving transducer, taking advantage of long duration of reception signal that includes multiple linear scattering such as mode conversion and boundary reflections. NEWS technique was then used as a pre-treatment of TR for spatial focusing of reemitted second harmonic signal. The robustness of this approach was demonstrated on a cracked specimen and the nonlinear TR focusing behavior is observed on the crack interface from which the second harmonic signal was originated.

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Assessment of the adhesion quality of fusion-welded silicon wafers with nonlinear ultrasound

Cited by 37 publications

References 6 publications

Research on Ultrasonic Testing Methods for Adhesion Quality of Ceramic Coatings

Research on Ultrasonic Testing Methods for Adhesion Quality of Ceramic Coatings

Assessment of Adhesive Bond Strength Using the Ultrasonic Technique

Nonlinear Time Reversal Focusing and Detection of Fatigue Crack

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