Study on Heat Transfer and Corrosion Resistance of Anodized Aluminum Alloy in Gallium-Based Liquid Metal

Cui, Yuntao; Ding, Yujie; Xu, Shuo; Wang, Yushu; Rao, Wei; Liu, Jing

doi:10.1115/1.4041665

Cited by 10 publications

(3 citation statements)

References 31 publications

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“…The studies related to metal/LMA‐based TIMs have shown that the introduction of these reduced the TCR to a significant level with some studies showing the values of TCR reducing to about 99.67% as compared with systems that used thermal greases as TIMs 43 . Some of the metal/alloy‐based TIMs include Mercury, indium, bismuth, Tin and more recently gallium‐based alloys have been widely used as it exhibits nontoxicity, excellent thermophysical properties and stability 44 . Recently a lot of emphasis is being laid to mitigate the challenges offered by metal‐based/LMA TIMs.…”

Section: Introductionmentioning

confidence: 99%

“…43 Some of the metal/alloy-based TIMs include Mercury, indium, bismuth, Tin and more recently gallium-based alloys have been widely used as it exhibits nontoxicity, excellent thermophysical properties and stability. 44 Recently a lot of emphasis is being laid to mitigate the challenges offered by metal-based/LMA TIMs. The challenges include liquid metal (LM) embrittlement, intermetallic growth, corrosion, migration/overflow, dewetting, thermomechanical stress resulting in cracks in TIM, and poor lifespan performance.…”

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confidence: 99%

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Thermal conformance parameters for assessment of heat transfer between similar and dissimilar metal contacts

Pathumudy,

Samuel,

Prabhu

2024

Heat Trans

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A novel approach to assess the thermal conformance between two metallic materials under transient conditions was proposed in the present investigation. Thermal conformance parameters (ƞ, ϴ, tg) were defined to quantify the contact condition between a metal–metal interface. To assess the effect of load and thermophysical properties of the sink and source materials on the degree of thermal conformance, a thermal conformance assessment parameter (TCAP) was proposed. Heat flux transients at the thermal interface was estimated by using an inverse heat conduction approach for various similar and dissimilar metallic surfaces in contact such as Cu─Cu, Al─Al, Al─Cu, and Cu─Al under both load and no load conditions. Commercially available silicone grease (SG) and thermal grease (CTG) were used as thermal interface materials (TIMs). The thermal conformance parameters increased with the increase in load for all the combinations of interfaces with and without TIMs. It was observed that, except for the copper–copper combination, thermal conformance parameters showed a linear relation with the TCAP. The enhancement in the heat transfer due to the application of load and TIM was validated by determining the maximum temperature difference (∆Tmax) across the interface. The experimental study revealed that the ∆Tmax decreases with the application of load and application of TIM leading to enhanced heat transfer. For the copper–copper combination, the thermal conformance depended solely on the load applied. Due to the lower thermal resistance offered by copper source/sink materials, the interfacial resistance between them becomes a dominant factor. The effect of TIM on heat absorbed by the sink was significant for the Cu/Cu interface.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Thermal conformance parameters for assessment of heat transfer between similar and dissimilar metal contacts

Pathumudy,

Samuel,

Prabhu

2024

Heat Trans

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“…In addition, the inlet velocity has a great effect on the flow and heat transfer performance. Although the application of liquid metal still has some problems, such as high price and strong corrosion to some metal materials [44,45], liquid metal cooling is still a good solution when faced with the problem of high heat fluids, which conventional heat exchange fluids cannot solve.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Convective Heat Transfer of Liquid Metal Gallium in Turbine Guide Vane

Zhang

Luo

et al. 2023

Aerospace

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The traditional blade cooling method can no longer meet the requirements of high cooling efficiency in modern engines. In order to solve this cooling problem, this paper proposes cooling turbine guide blades based on liquid metal. The feasibility was preliminarily verified using a one-dimensional heat conduction model. Then, using a numerical method, we found that the cooling effect of liquid metal is much better than that of air cooling. The main reason for its good cooling effect is that the heat transfer coefficient of liquid metal reaches a magnitude of tens of thousands. Moreover, as the inlet temperature of the liquid metal decreases and the inlet Reynolds number increases, the liquid cooling effect becomes better. The definition of the heat transfer quality factor can reflect the reasons for the influence of the inlet temperature of the liquid metal.

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High Thermal Conductivity in Multiphase Liquid Metal and Silicon Carbide Soft Composites

Kong

Wang

Casey

et al. 2021

Adv Materials Inter

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typically boost the thermal conductivity of the overall composite an order of magnitude beyond the base polymer (i.e., k ≈ 0.2 W m -1 K -1 for polymers). [5] Unlike curing TIMs, which exhibit elastomeric qualities due to cross-linking, noncuring TIMs can be dispensed, reworked, and remain in a fluid-like state under thermal cycling. The application-space for TIMs is large with varying requirements for mechancial, thermal, and other properties. For a detailed perspective on TIMs, we refer the reader to a number of review articles. [1,[5][6][7] Commercially available TIMs show modest thermal conductivity values that typically only range from 0.5-3 W m -1 K -1 despite containing high conductivity additives. [6] The relatively poor thermal transport through TIMs stem from a number of factors including interior thermal interface resistance between the polymer and filler particles, interior thermal interface resistance at filler-filler interfaces, and exterior thermal contact resistance to the TIM. [1,5,6] Increasing the filler volume fraction increases thermal conductivity, but is also subject to practical limitations as this reduces mechanical deformability and increases stiffness. Thermal transport percolation is achieved at critical volume fractions of solid fillers, which creates thermal transport pathways because high conductivity filler particles are in direct physical contact with one another. [8] However, percolated particles generally interface with each other through point-like contacts. This issue serves as a primary bottleneck for overall TIM thermal performance, independent of the filler materials employed. Physical joining methods such as welding or sintering of filler particles can increase the contact area between fillers for improved thermal transport. [9] However, forming these rigid connections requires additional processing steps and does not completely address the issue of composite stiffness for moderate to high filler loadings.Emerging TIMs consisting of room-temperature liquid metals (LMs) seek to improve the composite thermal conductivity by addressing the issues affecting thermal resistance and mechanical compliance. [7,10] Gallium-based LMs and its eutectic alloys (i.e., eGaIn and eGaInSn) have thermal conductivity values between 16-30 W m -1 K -1 depending on their elemental composition. [11] Unlike gallium which melts at 30 °C, both Thermal interface materials based on room temperature liquid metals (LMs) are promising candidates for improving thermal management of flexible electronics, microelectronics packaging, and energy storage devices. However, use of these materials is limited by their corrosivity and reactivity. Here, the fabrication and thermal characterization of multiphase soft composites consisting of LM and non-reactive silicon carbide (SiC) particles that are either uncoated or Ag-coated (Ag-SiC) are demonstrated. The LM-SiC (and LM-Ag-SiC) mixtures show thermal conductivities approaching 50 W m -1 K -1 at 40 vol% particles. Corrosion issues with aluminum-based components are...

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Study on Heat Transfer and Corrosion Resistance of Anodized Aluminum Alloy in Gallium-Based Liquid Metal

Cited by 10 publications

References 31 publications

Thermal conformance parameters for assessment of heat transfer between similar and dissimilar metal contacts

Thermal conformance parameters for assessment of heat transfer between similar and dissimilar metal contacts

Numerical Study on Convective Heat Transfer of Liquid Metal Gallium in Turbine Guide Vane

High Thermal Conductivity in Multiphase Liquid Metal and Silicon Carbide Soft Composites

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