Enhancing structural integrity of adhesive bonds through pulsed laser surface micro-machining

الموضوعات

علوم بحتة وطبيعية

الملخص

Enhancing the effective peel resistance of plastically deformingadhesive joints through laser-based surface micro-machiningEdwin Hernandez DiazInspired by adhesion examples commonly found in nature, we reached out to examine the effect of different kinds of heterogeneous surface properties that may replicate this behavior and the mechanisms at work. In order to do this, we used pulsed laser ablation on copper substrates (CuZn40) aiming to increase adhesion for bonding. A Yb-fiber laser was used for surface preparation of the substrates, which were probed with a Scanning Electron Microscope (SEM) and X-ray Photoelectron Spectroscopy (XPS). Heterogeneous surface properties were devised through the use of simplified laser micromachined patterns which may induce sequential events of crack arrest propagation, thereby having a leveraging effect on dissipation. The me- chanical performance of copper/epoxy joints with homogeneous and heterogeneous laser micromachined interfaces was then analyzed using the T-peel test. Fractured surfaces were analyzed using SEM to resolve the mechanism of failure and adhesive penetration within induced surface asperities from the treatment. Results confirm positive modifications of the surface morphology and chemistry from laser ablation that enable mechanical interlocking and cohesive failure within the adhesive layer. Remarkable improvements of apparent peel energy, bond toughness, and effective peel force were appreciated with respect to sanded substrates as control samples.

روابط وملفات

التعريف والنوع

رقم الوثيقة

0bc2493e-0c48-4203-bdbf-63da3fb60e22

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1700096_1.pdf

بيانات النشر

ألقاب المؤلفين

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اللغة

English

المصدر والدورية

اسم المصدر

Enhancing structural integrity of adhesive bonds through pulsed laser surface micro-machining

المحتوى والصفحات

عدد الصفحات

0

كلمات الباحثين

cohesive zone model , Copper alloys , epoxy , Laser ablation , patterned surfaces

إشراف وإعداد

الإشراف

جيل هين فرنارد لوبينو

الإعداد

إدوين هيرنانديز دياز

الاقتباسات الببليوغرافية