Bulk-wave and guided-wave photoacoustic evaluation of the mechanical properties of aluminum/silicon nitride double-layer thin films

Zhang, Feifei; Krishnaswamy, Sridhar; Lilley, Carmen M.

doi:10.1016/j.ultras.2006.06.064

Cited by 28 publications

(9 citation statements)

References 38 publications

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“…This is due to the high sensitivity of this method in a wide spectral range, the smallness of the required amount of the analyte, as well as the possibility of performing a nondestructive analysis of the distribution of the characteristics of the medium in depth [7]. In the work [8], to study the inhomogeneities and defects in the structure of materials, ultrasonic spectroscopy and flaw detection methods are used. The methods are based on an analysis of the frequency dependences of the attenuation coefficient and the phase velocity of acoustic waves in the material under study.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Laser optoacoustic method for investigation of some physical parameters of oil and oil products

Musaev

Abbasov

Abdullaeva

2017

EEJET

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Laser optoacoustic method for investigation of some physical parameters of oil and oil products

Musaev

Abbasov

Abdullaeva

2017

EEJET

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“…4 Acoustic-based methods are of great interest since they provide a non-destructive mean to probe interface quality and adhesion. Techniques using reflection and transmission of bulk acoustic waves at an imperfect interface 3,[5][6][7] or propagation of guided waves in bonded structures [8][9][10][11][12] or in plates with delamination [13][14][15][16] have been developed. Although less used, the application of interface waves suggests interesting potentialities owing to their extreme sensitivity to the boundary conditions at the contacting interface.…”

Section: Scaled Behavior Of Interface Waves At An Imperfect Solid-solmentioning

confidence: 99%

Scaled behavior of interface waves at an imperfect solid-solid interface

Valier‐Brasier

Dehoux

Audoin

2012

Journal of Applied Physics

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Laser ultrasonic techniques allow the remote analysis of adhesion mechanisms at imperfect interfaces up to GHz frequencies. However, the sensitivity of interface waves to the properties of the contact is not very well known. In the present work, the mechanical boundary conditions are described considering that the contacting solid half-spaces are connected by tangential and normal springs. Such a modeling implies a discontinuity of the displacement field across the interface. To identify the relative amplitudes of the different types of interface waves-skimming, leaky Rayleigh (LR) and Stoneley (St) waves-a semi-analytical time domain model describing the thermoelastic laser generation is derived. The results illustrate the influence of the boundary conditions on the attenuation of the LR wave and on the existence of the St wave. In addition, a single compact and elegant dispersion equation is presented to investigate the behaviour of the interface waves propagating along a generalized imperfect boundary. Such analysis reveals the existence of a cutoff frequency f c close to which the St wave behaves like a skimming transverse wave. A scaled analysis demonstrates that two master curves suffice to describe the dispersion of LR and St waves and that f c is inversely proportional to the tangential interfacial spring constant.

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“…Yun [24] evaluated the Young's modulus of a silicon nitride thin film based on microcantilever resonance tests with ultrasonically actuations. When compared with other techniques to investigate micro materials' mechanical behavior, including bending [25], ultrafast laser metrology [26] and bulge tests [27], micocantilever techniques can provide simpler procedures or enhanced detectability. The aforementioned micro beam test methods are enlightening, however their applications are still confined to microscale materials such as thin films.…”

Section: Introductionmentioning

confidence: 99%

Study on the Dynamic Mechanical Properties of Viscoelastic Materials Based on Asymmetrical Sandwich Beams

Qing-qing¹,

Wang²

2018

Applied Sciences

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A modified estimation method for the dynamic mechanical properties of viscoelastic materials via asymmetrical sandwich specimens is presented. In contrast to the traditional vibrating cantilever beam test method (VCBTM), the proposed method allows asymmetrical base beams in sandwich specimens. Based on the complex stiffness method, complex parameters are introduced for general sandwich configurations. Calculation formulas for loss factor and shear modulus of the core material are presented. The effectiveness of this approach is validated numerically and experimentally by analysis of one symmetrical sandwich beam specimen and two specimens with asymmetrical thicknesses and materials. It is shown that dynamic mechanical parameters of the core material can be obtained regardless of sandwiches' symmetry. The proposed method breaks the symmetrical criteria for sandwich specimens and may provide a wider application to measure viscoelastic materials' dynamic properties.

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Bulk-wave and guided-wave photoacoustic evaluation of the mechanical properties of aluminum/silicon nitride double-layer thin films

Cited by 28 publications

References 38 publications

Laser optoacoustic method for investigation of some physical parameters of oil and oil products

Laser optoacoustic method for investigation of some physical parameters of oil and oil products

Scaled behavior of interface waves at an imperfect solid-solid interface

Study on the Dynamic Mechanical Properties of Viscoelastic Materials Based on Asymmetrical Sandwich Beams

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