Hybrid coupling layers for bulk metallic glass adhesion

Yang, Jeffrey; Dauskardt, Reinhold H.

doi:10.1557/jmr.2013.331

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…In order to prevent fast precipitation of ZrO 2 out of solution, the TPOZ was stabilized with glacial acetic acid (45 wt%) (EMD, Gibbstown, NJ) to introduce acetate ligands on the zirconium (TPOZ‐Ac), which slowed down the hydrolysis. All of the sol gel solutions consisted of solutes in de‐ionized water (3.75 wt%) with zirconate:GPTMS molar ratio of 0.7 . Solutions were prepared according to the pretreatment of the GPTMS precursor.…”

Section: Methodsmentioning

confidence: 99%

“…These interfaces are ubiquitous in applications ranging from modern multilayer device technologies such as flexible electronics and microelectronics to high‐performance applications such as structural joints and fiber‐metal laminates . Hybrid materials containing organic and inorganic networks that are highly cross‐linked at the molecular scale can be designed to exhibit multifunctional properties by taking advantage of the combined organic and inorganic functionalities, and are therefore suitable materials for attacking these challenges …”

Section: Introductionmentioning

confidence: 99%

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Selective Deposition of Compositionally Graded Hybrid Adhesive Films

Giachino

Watson

Dubois

et al. 2015

Adv Materials Inter

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different water solubilities, hydrolysis, and polycondensation rates. Nevertheless, for hybrid fi lms deposited from aqueous solutions, it is often believed that the composition of the resulting fi lm is representative of the species that are the majority in solution. However, this is not always the case especially when dealing with dynamic and kinetically driven systems. For example, our previous work has shown that synthesizing hybrid fi lms from heterogeneous solutions is an innovative strategy to control the interfacial and bulk properties of the deposited fi lms. [ 19,20 ] Here we show that by using a dip coating technique, the minority of the species in solution, due to their chemical state, become the predominant species on the deposited fi lm. This selective deposition of minority species adds another dimension that allows for the control of the molecular structure of a fi lm deposited from dynamic systems involving, for example, copolymerization of functional organosilanes, macromonomers, and metal alkoxides. We highlight the effectiveness of this technique by depositing compositionally graded hybrid organic-inorganic fi lms, capable of forming a high-performance bond at the interface between an organic layer and an oxide substrate. We show that when synthesizing these fi lms, changes in the chemical structure of the precursors in solution that would appear insignifi cant actually result in a dramatic enhancement of the physical properties of the deposited fi lms.We use an aqueous and dilute sol-gel approach using an epoxy-functionalized silane, 3-(glycidoxypropyl)trimethoxysilane (GPTMS), and a zirconium alkoxide, tetran -propoxyzirconium (TPOZ). [19][20][21]23,24 ] In order to deposit fi lms with a compositionally graded molecular structure that are organic-rich toward the top, the molecular weight of the organic and inorganic networks formed by the GPTMS and TPOZ precursors in solution need to be optimized prior to deposition. Due to the interlaced inorganic and organic chemistry in this system, it is both dynamic and kinetically driven, therefore careful pretreatment of the precursors is necessary in order to allow for proper crosslinking of the molecular networks. We show that precise pretreatment of the GPTMS with hydrochloric acid (HCl) is fundamental to achieve an organosilicate network with a molecular weight optimized to enrich the top surface of the fi lm. By coupling a thin-fi lm delamination technique with chemical characterization of the fi lms, we correlated the underlying molecular structure to the adhesive/cohesive properties of the fi lms. We found that increasing the condensation of a very small fraction of the Hybrid organic-inorganic materials that are compositionally graded are excellent candidates for addressing the challenges related to the bonding of polymeric layers and inorganic substrates. Often, the synthesis of these hybrid materials involves the use of kinetically driven and dynamic solution systems where obtaining the desired hybrid molecular structures in the deposited fi...

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Selective Deposition of Compositionally Graded Hybrid Adhesive Films

Giachino

Watson

Dubois

et al. 2015

Adv Materials Inter

Self Cite

View full text Add to dashboard Cite

show abstract

“…We recently reported on an adhesive hybrid organic/inorganic system synthesized using an epoxy-functionalized silane, (3-glycidoxypropyl)trimethoxysilane (GPTMS), and an acetate-stabilized zirconium alkoxide, tetra- n -propoxyzirconium (TPOZ-Ac). ,,− The optimal molecular structure was obtained using sol–gel chemistry and by tuning the sol–gel processing parameters . Here, we explore the adhesive and cohesive properties of the films in both inert and reactive humid environments.…”

Section: Introductionmentioning

confidence: 99%

Molecular Design for Moisture Insensitivity of Compositionally Graded Hybrid Films

Giachino

Dubois

Dauskardt

2015

ACS Appl. Mater. Interfaces

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Effective bonding of organic/inorganic interfaces especially in high humidity environments is paramount to the structural reliability of modern multilayer device technologies, such as flexible electronics, photovoltaics, microelectronic devices, and fiber-metal laminates used in aerospace applications. We demonstrate the ability to design compositionally graded hybrid organic/inorganic films with an inorganic zirconium network capable of forming a moisture-insensitive bond at the interface between an oxide and organic material. By controlling the chemistry of the deposited films and utilizing time-dependent debonding studies, we were able to correlate the behavior of the hybrid films at high humidity to their underlying molecular structure. As a result, an outstanding threefold improvement in adhesion of silicon/epoxy interfaces can be obtained with the introduction of these films even in high humidity environments.

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Adhesion of metallic glass and epoxy in composite-metal bonding

Hamill

Nutt

2018

Composites Part B: Engineering

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Hybrid coupling layers for bulk metallic glass adhesion

Cited by 4 publications

References 15 publications

Selective Deposition of Compositionally Graded Hybrid Adhesive Films

Selective Deposition of Compositionally Graded Hybrid Adhesive Films

Molecular Design for Moisture Insensitivity of Compositionally Graded Hybrid Films

Adhesion of metallic glass and epoxy in composite-metal bonding

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