Adhesion enhancement by MeV ion irradiation

Ingemarsson, P. Anders

doi:10.1016/0168-583x(90)90005-f

Cited by 18 publications

(1 citation statement)

References 51 publications

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“…In the molten state, the high mobility of FP molecular chains stimulates the coupling reaction of free radicals, which results in the formation of cross-linked FPs . Various studies have considered the effect of ion beam irradiation (e.g., Ar + , He + , Ne + , N + , O + , and C + ) on the interfacial adhesion between metals and FPs. − Recent research has shown that a 1000 keV electron irradiation above the melting point of FPs and under anoxic conditions significantly enhances the adhesion between an FP and metal substrate. , Ikeda et al evaluated the improved adhesiveness with electron irradiation by the cross-cut tape peeling test (JIS-K-5400), which involves peeling tape 500 times, as shown in Figure . For the coating without irradiation, the metal substrate was etched to increase the unevenness and improve the adhesiveness.…”

Section: Introductionmentioning

confidence: 99%

High-Energy Electron-Irradiated Fluorinated Ethylene Polypropylene Copolymer Coatings on Al Substrates for Enhanced Metal Adhesion and Protection

Kubo

Sonohara

Uemura

et al. 2022

ACS Appl. Nano Mater.

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Fluorocarbon polymers (FPs) are ideal coatings for sliding parts in automotive, medical, or semiconductor manufacturing equipment owing to their excellent nonadhesiveness, low friction, and high heat and chemical resistance. FPs are used as coatings of slide bearings, oil pumps, sliding packing in automobiles, robot housing in biomedical fields, and the inner surface of the exhaust duct in semiconductor manufacturing equipment. However, the nonadhesiveness of FPs hinders their adhesion to metals, preventing their application. Recently, high-energy electron irradiation during the coating process above the melting point of FPs and under anoxic conditions has been proven to enhance the adhesion of FPs to metal substrates. However, the mechanism underlying this phenomenon remains unveiled because the investigation of the buried interface is difficult. Herein, we fabricated samples of fluorinated ethylene–polypropylene (FEP) coating an Al substrate using a unique approach based on semiconductor manufacturing processes to clarify the morphology and chemical interactions of the Al–FEP interface. Time-of-flight secondary ion mass spectrometry showed that the uncoated Al surface comprised 0.5 nm-thick Al hydroxides. Scanning transmission electron microscopy–energy-dispersive X-ray spectroscopy showed that a 1000 keV electron irradiation during the coating process caused a significant diffusion of F atoms from the FEP layer to Al. Soft X-ray photoelectron spectroscopy (XPS) clearly indicated that the O atoms in the native Al2O3 layer were substituted by F atoms. Hard XPS showed the appearance of strong C–O–Al bonds caused by the irradiation. These results stem from the irradiation-induced cleavage of the C–F bonds in the FEP coating and O–Al–O bonds in the native Al2O3, facilitating the diffusion of F atoms and the formation of C–O–Al bonds, improving the adhesion between the FEP coating and Al substrate. Thus, high-energy electron irradiation modified the nanostructure at the Al–FEP interface through the FEP layer.

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Section: Introductionmentioning

confidence: 99%

High-Energy Electron-Irradiated Fluorinated Ethylene Polypropylene Copolymer Coatings on Al Substrates for Enhanced Metal Adhesion and Protection

Kubo

Sonohara

Uemura

et al. 2022

ACS Appl. Nano Mater.

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Physico‐chemical modifications of solid surfaces by interaction with ion beams

Pignataro

1992

Surface & Interface Analysis

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The physico-chemical processes occurring in the particle (ion, electron, photon) bombardment of a surface are reviewed, with particular emphasis on the ion beamsolid interaction. The main factors influeoCiag the chemical reactions which occur by ion bombardment will be discussed in terms of L i n d h a r e h a W h i 0 t t (LSS) theory on the basis of experimental data obtained on both organic and inorganic simple systems as well as on polymers. Some typical reaction schemes will be reported and the modification of the physical properties of the bombarded surface will be shown to be coILoected with the chemical nature of the products formed as a consequence of the energy deposition of the ion beam. A few examples showing the importance of the above phenomena in the field of surface and interface analysis will be given.

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Ion Beam Induced Chemical Reactions at Polymer Surfaces

Pignataro

Marletta

1991

Metallized Plastics 2

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Adhesion enhancement by MeV ion irradiation

Cited by 18 publications

References 51 publications

High-Energy Electron-Irradiated Fluorinated Ethylene Polypropylene Copolymer Coatings on Al Substrates for Enhanced Metal Adhesion and Protection

High-Energy Electron-Irradiated Fluorinated Ethylene Polypropylene Copolymer Coatings on Al Substrates for Enhanced Metal Adhesion and Protection

Physico‐chemical modifications of solid surfaces by interaction with ion beams

Ion Beam Induced Chemical Reactions at Polymer Surfaces

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