Detection of contaminants on pre-bond surface by LIBS

Sato, Tadatake; Kawaguchi, Yoshizo; Akiyama, Haruhisa; Ohmura, Hideki

doi:10.1080/00218464.2017.1388169

Cited by 7 publications

(8 citation statements)

References 17 publications

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“…Sato et al 99 created an apparatus to prepare samples with controlled contamination, Figure 13, where the substrate was translated in a reciprocating movement behind a shielding plate, through which liquid contaminant was sprayed using a pressureregulated gun.…”

Section: Contamination Assessmentmentioning

confidence: 99%

“…LIBS is an analytical method based on atomic emission spectroscopy. 99,103 This method does not require surface preparation, allowing a rapid and in situ analysis of the structures. For the evaluation of the application of this method in adhesive joints, aluminum substrates contaminated with silicone oil were used.…”

Section: Contamination Assessmentmentioning

confidence: 99%

“…LIBS was able to detect contamination sites for silicone oil concentrations up to 12 mg/m 2 , which is not enough to detect all the contamination sites that may cause a decrease in strength of the bond, but still constitutes an interesting evaluation method to discard joints that most certainly will fail due to influence of silicone oils. 99 Greiveldinger et al 4 developed a heated attenuated total reflection (ATR) cell to study the evolution of the adhesive/substrate interphase. This process requires the substitution of the substrate used in the real adhesive joint for the ATR crystal, which may introduce errors in the study since several authors reported that the diffusion of the contaminant into the adhesive also depends on the substrate.…”

Section: Contamination Assessmentmentioning

confidence: 99%

“…Figure13. Apparatus for application of controlled layers of contamination (adapted from Sato et al99 ).…”

mentioning

confidence: 99%

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Review on the effect of moisture and contamination on the interfacial properties of adhesive joints

Borges

Marques

Carbas

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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Adhesives play an important role in many key industrial sectors, such as the automotive industry, enabling the construction of lightweight, multi-material structures, combining polymers, composites and metals. However, adhesives are usually polymeric materials, which can be affected by environmental and working conditions, such as moisture and contamination. Although moisture and contamination degrade the adhesive, the failure of a bonded joint is often ultimately interfacial. Therefore, a literature review on the influence of those factors on the interfacial properties of adhesive joints is performed to understand the phenomena that take part in the degradation on adhesive joints when subjected to humid and contaminated environments, which can oftentimes be the case in factory conditions, especially for parts from third-party suppliers. The mechanisms and effects of moisture aging and contamination are presented, as well as experimental testing methods and practical case studies. It is concluded that both moisture and other contaminants may lead to a reduction in joint strength and catastrophic adhesive failure. Moisture absorption can occur through the adhesive, but in an adhesive joint, it can additionally occur through the substrate, the interface between the adhesive and the substrate or in the cracks and pores of the adhesive. After water ingresses into the adhesive, it decreases its mechanical properties and plasticizes it. However, in an adhesive joint, the water diffusion occurs much faster than in bulk adhesive due to the complementary diffusion paths, which typically leads to adhesive failure at the adhesive/substrate interface. Additionally, in an adhesive joint, water may induce the hydrolysis of the substrates or have other chemical interactions with them. Contaminants can diffuse through the joint or remain at the adhesive/ substrate interface. When they diffuse through the joint, they have consequences similar to those of water sorption. However, when they remain at the interface, they can produce locally debonded areas, which may lead to joint failure.

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Section: Contamination Assessmentmentioning

confidence: 99%

Section: Contamination Assessmentmentioning

confidence: 99%

Section: Contamination Assessmentmentioning

confidence: 99%

“…Figure13. Apparatus for application of controlled layers of contamination (adapted from Sato et al99 ).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Review on the effect of moisture and contamination on the interfacial properties of adhesive joints

Borges

Marques

Carbas

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

show abstract

“…6 Contamination by silicone oil with a surface concentration lower than 1.0 mg cm −2 was found to degrade the adhesion strength. [7][8][9] We initially evaluated an LOD of 1.18 mg cm −2 for detecting the silicon oil adhered onto the Al alloy by LIBS. 7 Subsequently, the conditions for sensitive detection were explored, and the LOD value was improved to 0.529 mg cm −2 .…”

Section: Introductionmentioning

confidence: 99%