Thermal and mechanical properties of advanced composite materials at low temperatures.

Takeno, M.; Nishijima, Shigehiro; Okada, T.; Fujioka, K.; Kuraoka, Yasuo

doi:10.2221/jcsj.21.182

Cited by 20 publications

(2 citation statements)

References 7 publications

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“…The alumina FRP has been used as supporting rods in the ultra-low-vibration cryocooler system for the gravitational wave detector [15]. The carbon FRP is known to exhibit sufficiently low thermal conductivity at low temperatures [16] with larger Young's modulus than the alumina FRP.…”

Section: System Overviewmentioning

confidence: 99%

Development of a near-5-Kelvin, cryogen-free, pulse-tube refrigerator-based scanning probe microscope

Kasai,

Koyama,

Yokota

et al. 2022

Preprint

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We report the design and performance of a cryogen-free, pulse-tube refrigerator (PTR)-based scanning probe microscopy (SPM) system capable of operating at the base temperature of near 5 K. We achieve this by combining a home-made interface design between the PTR cold head and the SPM head, with an automatic gas-handling system. The interface design isolates the PTR vibrations by a combination of polytetrafluoroethylene and stainless-steel bellows, and by placing the SPM head on a passive vibration isolation table via two cold stages that are connected to thermal radiation shields using copper heat links.The gas-handling system regulates the helium heat-exchange gas pressures, facilitating both the cool down to and the maintenance of the base temperature. We discuss the effects of each component using measured vibration, current-noise, temperature, and pressure data. We demonstrate that our SPM system performance is comparable to known liquid-helium-based systems with the measurements of the superconducting gap spectrum of Pb, atomic-resolution scanning tunneling microscopy image and quasiparticle interference pattern of Au(111) surface, and non-contact atomic force microscopy image of NaCl(100) surface. Without the need for cryogen refills, the current SPM system enables uninterrupted low-temperature measurements.

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Section: System Overviewmentioning

confidence: 99%

Development of a near-5-Kelvin, cryogen-free, pulse-tube refrigerator-based scanning probe microscope

Kasai,

Koyama,

Yokota

et al. 2022

Preprint

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show abstract

“…(10,11) CFRP shows characteristic physical properties that depend on the type of matrix resin and molding conditions such as pressing temperature and forming pressure. (2,3) Moreover, its physical properties show large anisotropy in the direction of the carbon fibers; (12,13) thus, CFRP has a thermal anisotropy due to the large difference between the thermal conductivities of the carbon fiber and the matrix resin and also a thermal resistance between their interface. However, the effect of the orientation of the carbon fibers on heat propagation is not very clear.…”

Section: Introductionmentioning

confidence: 99%

Thermal Orientation Evaluation for Carbon-fiber-reinforced Plastic by Periodic Heating Method

Nagata¹,

Miyake²,

Ozaki³

2019

Sensors and Materials

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Since the thermal anisotropy of carbon-fiber-reinforced plastic (CFRP) depends on the direction of the carbon fibers, it is important to understand the thermal characteristics of CFRP in a three-dimensional thermal propagation. To reveal the relationship between the direction of the carbon fibers and the preferred thermal orientation, we developed a method of estimating thermal anisotropy by analyzing the dependence of measured phase lags on the distance from a heating spot, on the basis of a periodical heating method. Measurement results of the CFRP samples with different fiber orientations in the thickness direction, fabricated by hot pressing, showed a mismatch between the fiber and thermal orientations. It was found that the fiber orientation is not necessarily in conformity with the thermal orientation. The proposed method might be effective for evaluating the thermal anisotropy of CFRP.

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Measurement of Heat Conduction through Metal Spheres

Lewis

Radebaugh

2002

Cryocoolers 11

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Thermal and mechanical properties of advanced composite materials at low temperatures.

Cited by 20 publications

References 7 publications

Development of a near-5-Kelvin, cryogen-free, pulse-tube refrigerator-based scanning probe microscope

Development of a near-5-Kelvin, cryogen-free, pulse-tube refrigerator-based scanning probe microscope

Thermal Orientation Evaluation for Carbon-fiber-reinforced Plastic by Periodic Heating Method

Measurement of Heat Conduction through Metal Spheres

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