Reducing thermal contact resistance using nanocoating

Goodarzi, Koorosh; Ramezani, Sayed Reza; Hajati, Shaaker

doi:10.1016/j.applthermaleng.2014.04.028

Cited by 17 publications

(4 citation statements)

References 20 publications

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“…Here, a silicon wafer with a 300 nm oxide insulating layer is used as the substrate, and an alumina-doped zinc oxide (AZO) film, [15] with stable chemical properties in air, is selected to be the thermoelectric film. To minimize the potential contact thermal resistance [16] between the substrate and the film, atomic layer deposition (ALD), with its inherent conformal coating characteristic [17] is chosen to deposit the thermoelectric film. Following that, we systematically scrutinize these models using a combination of FEA simulations and actual prototypes.…”

Section: Design Principle For T-psdmentioning

confidence: 99%

Thermal Sight: A Position‐Sensitive Detector for a Pinpoint Heat Spot

Peng,

Zhao,

Venugopal

et al. 2024

Small Science

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Precise positioning is a never‐ending goal in both fundamental science and technology. Recent decades of advancements in high‐precision position detection have predominantly relied on photoelectric effects for light detection in semiconductors. Herein, a different approach is proposed: The thermoelectric‐based position‐sensitive detector (T‐PSD) concept is designed to detect single heat spots arising from various energy sources, including electromagnetic radiation, electrons, and macroscopic mechanical heat. The T‐PSD concept is initially derived mathematically from the fundamental principles of heat conduction and the Seebeck effect. Subsequently, it is proved by finite element simulation in both 1D and 2D configurations. Following this theoretical groundwork, T‐PSD prototypes are fabricated and subjected to positional detection using various stimuli such as CO2 laser beam, hot soldering tip, and electron beam. In the prototypes, structured aluminum‐doped zinc oxide thermoelectric thin films, prepared via atomic layer deposition, are outfitted with voltage probes, enabling the measurement of thermoelectric voltages as a function of position and the intensity or temperature of the heat spot. Furthermore, practical decoding strategies are introduced to infer the position from the measured signals. The T‐PSD in this article showcases considerable promise in high‐precision position detection such as (quasi‐)particle tracking and precision machinery, offering an alternative concept in PSD design.

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Section: Design Principle For T-psdmentioning

confidence: 99%

Thermal Sight: A Position‐Sensitive Detector for a Pinpoint Heat Spot

Peng,

Zhao,

Venugopal

et al. 2024

Small Science

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“…Thermal contact conductance (TCC) is widely used in engineering applications such as machinery manufacturing, aircraft connection structures, ball bearings, low-temperature superconductivity and heat exchangers (Goodarzi et al , 2014; Kogut and Komvopoulos, 2003; Kogut and Komvopoulos, 2004). Many researchers have carried out a lot of research work and developed many prediction models to calculate the TCC of the joint surfaces.…”

Section: Introductionmentioning

confidence: 99%

Fractal model of thermal contact conductance of two spherical joint surfaces considering friction coefficient

Sun

Meng

Duan

2022

ILT

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Purpose The purpose of this study is to propose a fractal model of thermal contact conductance (TCC) of two spherical joint surfaces, considering friction coefficient based on the three-dimensional fractal theory. Design/methodology/approach The effects of friction coefficient, fractal parameters, radius of curvature and contact type on TCC were analyzed using numerical simulation. Findings The results indicate that the TCC decreases with the increase of friction coefficient and fractal roughness and increases with the increase of fractal dimension and radius of curvature; the contact type of two spherical joint surfaces has an important influence on the TCC, and the TCC of external contact is smaller than that of internal contact under the same contact load. Originality/value A fractal model of TCC of two spherical joint surfaces considering friction coefficient is proposed in this paper. Achievements of this work provide some theoretical basis for the research of TCC of bearings and other curved surfaces.

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“…TCR is one of the most critical parameters for the thermal analysis of materials. It affects applications with engineering devices that require a high heat flux [14,15], making it difficult to accurately manage the heat and cooling performance of many applications, such as those observed in the aeronautical industry, cryogenics, the nuclear industry, microelectronics, and space vehicles, among others [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Thermal Contact Resistance between Mold Steel and Additively Manufactured Insert for Designing Conformal Channels: An Experimental Study

Souza

Capela

Lopes

et al. 2022

JMMP

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The focus of this research is on thermal contact resistance between a mold and its insert, specifically inserts made by additive manufacturing (AM). Using a thermal steady-state system and varying contact pressures (0, 50, 75, and 100 bars), we present experimental results of the thermal contact resistance at the contact interface between steel A (1.2344), obtained from an extruded rod, and steel B (1.2709), produced by laser powder bed fusion. Thermal tests were performed for unbonded and bonded configurations. Results showed that increasing the contact pressure allows the system equilibrium to be reached at lower temperatures. Furthermore, thermal tests showed that in the transition zone of the bonded configuration, a well-defined resistance is not formed between the two steel samples as it occurs in the unbonded configuration. For the unbonded configuration, the thermal contact resistance values decrease with increasing applied contact pressure, improving the system’s heat transfer.

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Reducing thermal contact resistance using nanocoating

Cited by 17 publications

References 20 publications

Thermal Sight: A Position‐Sensitive Detector for a Pinpoint Heat Spot

Thermal Sight: A Position‐Sensitive Detector for a Pinpoint Heat Spot

Fractal model of thermal contact conductance of two spherical joint surfaces considering friction coefficient

Thermal Contact Resistance between Mold Steel and Additively Manufactured Insert for Designing Conformal Channels: An Experimental Study

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