Joining of alumina by using polymer blend method

Kita, Ken’ichiro; Kondo, Naoki; Izutsu, Yasuhisa; Kita, Hideki

doi:10.2109/jcersj2.120.408

Cited by 4 publications

(2 citation statements)

References 30 publications

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“…11), 12) In addition, aluminum silicate is a kind of glass and grains of silicon nitride can be joined together by using glass. 13) Hence, there is a possibility that aluminum and silicon nitride can be joined using polysiloxane.…”

Section: )6)mentioning

confidence: 99%

A novel method for joining aluminum and silicon nitride by polysiloxane

Kita

Kondo

2017

J. Ceram. Soc. Japan

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This paper describes a novel method for joining aluminum and silicon nitride using a polysiloxane. The X-ray diffraction patterns suggested that the polysiloxane surrounded by aluminum and silicon nitride powders could be transformed into silicon, aluminum silicate, and SiAlON. Neither cracks nor exfoliation between aluminum and silicon nitride could be observed, and they were joined through the joining layer. Moreover, detailed investigation of the layer by transmission electronic microscopy, selected area electron diffraction, and point analysis energy-dispersive X-ray spectroscopy suggested that the layer consisted of amorphous and nano-sized polycrystalline particles containing aluminum, silicon, nitrogen, and oxygen. The minimum thickness of the layer was less than 10 nm. The bending strength of the joined sample was 204 MPa and the fracture point was the joining layer between aluminum and silicon nitride.

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Section: )6)mentioning

confidence: 99%

A novel method for joining aluminum and silicon nitride by polysiloxane

Kita

Kondo

2017

J. Ceram. Soc. Japan

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“…For example, adding reinforcement materials into a polymer matrix may drastically improve its properties. Some conventional fiber reinforcements, which include natural wood fiber [1], carbon fiber [2], glass fiber [3], steel [4] and alumina fiber [5], are mixed as additions into the polymers to enhance the mechanical/electrical properties. In comparison to those conventional reinforcement materials, nano-scale reinforcements are much more effective in terms of increasing the area of the reinforcement/polymer interface [6,7].…”

Section: Chapter 1 Introductionmentioning

confidence: 99%

Near infrared photon-assisted polymerization of advanced polymer composites.

Xu¹

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This dissertation describes a novel method to develop polymer composites using near infrared (NIR) photon-assisted polymerization and nanoscale reinforcement. We used multi-walled carbon nanotubes (MWNTs), reduced graphene oxide (RGO), and graphene nanoplatelets (GNPs) to make polymer composites, and explored in-situ NIR photon assisted heating of these nano carbons to enhance polymerization of the nanocarbon/polymer interface, thus achieving significant load transfer and improved vii mechanical properties. To specify, nano-carbon was dispersed into the polymer matrix by shear or evaporation mixing method to attain a uniform distribution in the prepared thin film composite. The thin film was exposed to NIR light during polymerization instead of conventional oven based heating. NIR was effectively absorbed by nano-carbons and also atoms from polymer molecule; the induced photo-thermal heat was transferred into the polymer matrix to induce polymerization of the composite and the covalent bonding between nano-carbons and polymer matrix at the interface. Scanning electron microscope (SEM), Raman spectroscopy, and RSA were used to evaluate the load transfer and mechanical strength of the polymerized composite samples. Investigating first the nanotube/polymer composites synergized by NIR photon-assisted polymerization, largeRaman shifts (20 cm -1 wavenumber for up to 80% strains) of the 2D band were recorded for the NIR light polymerized samples and an increase in Young's modulus by ~130%was measured for the 1 wt. MWNT/poly(dimethylsiloxane) (PDMS) composites. While at first it was thought that NIR radiation during polymerization heated the nano-carbons inside resulting in strengthening of the nano-carbon/polymer interface, it was seen after further experimentation with graphene reinforcements that other light induced bonding effects apart from heat were also responsible.Raman spectroscopy revealed that mixing graphene in polymer has a profound As a demonstration of applications, PDMS/RGO/PDMS sandwiched structure strain sensor, a demo application of the NIR photon-assisted polymerization was investigated. High sensitivity and high Gauge Factor (GF) are addressed. These results shown in this dissertation suggest that the NIR photon-assisted polymerization can be practically developed as a scalable nanomanufacturing technique to create large panels of advanced composites with strong interface and better mechanical properties compared to conventional oven based heating methods. It also suggests that it is possible to fabricate large-scale flexible smart device like high sensitivity strain sensors.xi

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Research progress of ultrafine alumina fiber prepared by sol-gel method: A review

Liu

Wang

et al. 2021

Chemical Engineering Journal

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Joining of alumina by using polymer blend method

Cited by 4 publications

References 30 publications

A novel method for joining aluminum and silicon nitride by polysiloxane

A novel method for joining aluminum and silicon nitride by polysiloxane

Near infrared photon-assisted polymerization of advanced polymer composites.

Research progress of ultrafine alumina fiber prepared by sol-gel method: A review

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