Effects of thermal conductivity on the thermal contact resistance between non-conforming rough surfaces: An experimental and modeling study

Bi, Dongmei; Jiang, Mei; Chen, Huanxin; Liu, Shanjian; Liu, Yaya

doi:10.1016/j.applthermaleng.2020.115037

Cited by 20 publications

(9 citation statements)

References 18 publications

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“…In this work, the excellent contact at the interfaces improves the thermal contact resistance between the VGNs and substrates. By utilizing a time-domain reflectance (TDTR) method (Figure S15 and Table S1), the thermal contact resistance between the VGNs and substrates was measured to be 3.39 × 10 –9 m 2 ·K·W –1 , which was orders of magnitude lower than those reported in previous reports, as shown in Figure f. ,− The thermal conductivity of the VGNs was also measured to be 5.16 W·m –1 ·K –1 , which was much higher than that of the commonly used commercial TCTs. According to the classic thermal conductive theory, the thermal contact resistance is mainly determined by the contact area (Figure S16).…”

Section: Resultsmentioning

confidence: 76%

“…Meanwhile, TIMs are physically clipped between the heat sink and heat source (Figure S14). The microgaps with nonflowing air would exist at the interface, which exhibit a very high thermal resistivity over 1 × 10 –6 m 2 ·K·W –1 . Thermal conductive tapes (TCTs) are widely used for thermal management in electronic devices, which can be coated on the surface of a heat source with better physical contact.…”

Section: Resultsmentioning

confidence: 99%

“…As a result, the direct growth of VGNs on dielectrics at near room temperature has great significance for their application in electronic devices. Furthermore, thermal contact resistance is an important parameter of TIMs, which is critically determined by the area of contact surfaces at the interfaces. , …”

Section: Introductionmentioning

confidence: 99%

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Near Room-Temperature Synthesis of Vertical Graphene Nanowalls on Dielectrics

Wang

Zhu

Zheng

et al. 2022

ACS Appl. Mater. Interfaces

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Vertical graphene nanowalls (VGNs) with excellent heat-transfer properties are promising to be applied in the thermal management of electronic devices. However, high growth temperature makes VGNs unable to be directly prepared on semiconductors and polymers, which limits the practical application of VGNs. In this work, the near room-temperature growth of VGNs was realized by utilizing the hot filament chemical vapor deposition method. Catalytic tantalum (Ta) filaments promote the decomposition of acetylene at ∼1600 °C. Density functional theory calculations proved that C2H* was the main active carbon cluster during VGN growth. The restricted diffusion of C2H* clusters induced the vertical growth of graphene nanoflakes on various substrates below 150 °C. The direct growth of VGNs successfully realized the excellent interfacial contact, and the thermal contact resistance could reach 3.39 × 10–9 m2·K·W–1. The temperature of electronic chips had a 6.7 °C reduction by utilizing directly prepared VGNs instead of thermal conductive tape as thermal-interface materials, indicating the great potential of VGNs to be directly prepared on electronic devices for thermal management.

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Section: Resultsmentioning

confidence: 76%

Section: Resultsmentioning

confidence: 99%

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Near Room-Temperature Synthesis of Vertical Graphene Nanowalls on Dielectrics

Wang

Zhu

Zheng

et al. 2022

ACS Appl. Mater. Interfaces

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“…Ren et al 24 applied physical pressure on the contact surface in their study, which showed that larger contact pressure could increase the active contact area, thus reducing the thermal contact resistance and increasing the heat transfer efficiency. Bi et al 25 studied the influence of the thermal conductivity of heat transfer objects on thermal contact resistance, and the results showed that it was inversely proportional to thermal contact resistance and thus increasing the thermal conductivity of heat transfer objects can reduce the thermal contact resistance. Dai et al 26 studied the thermal contact resistance of contact interface filling with vacuum, air, and silicone grease with high thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

The effect of reducing the thermal contact resistance on the performance of battery thermal management system

et al. 2021

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Summary With the increasing demand for the driving range of new energy vehicles, the energy of power battery is increasing. As a temperature‐sensitive component, the life, safety, and charge–discharge performance of lithium‐ion power battery will be affected by the working temperature, which makes the battery thermal management system particularly important. Concerning the fact that the thermal contact resistance between the power battery and the heat transfer components has become the bottleneck of battery thermal management system, this study firstly establishes a traditional sandwich structure of phase change material–based thermal management system and then try to reduce the thermal contact resistance of the system by increasing the thermal conductivity of the cooling part and filling the interface with high thermal conductivity material. The thermal contact resistance and the heat flux between the power battery and the thermal management module are experimentally tested and calculated. Based on the external and internal temperature of battery, the effect of contact resistance on the performance of a thermal management system is discussed. The results show that when increasing the thermal conductivity of the cooling part, the battery external and internal temperatures under 3C, 4C, and 5C discharge are reduced by 8.3%, 8.1%, 7.6% and 5.2%, 9.3%, 6.3%, respectively, as compared to the traditional sandwich structure of phase change material–based thermal management system. And the temperatures are further reduced by 6.5%, 7.7%, 6.3% and 7.8%, 6.1%, 7.3% when the interface between the battery and the thermal management module are filled with graphene with high thermal conductivity. Furthermore, the power battery can work within the optimum operating temperature range for a long period and can ensure battery safety by reducing the thermal contact resistance.

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“…A small number of cycles were needed to reach the quasi-steady-state temperature distribution at the contact zone. Bi et al 21 explored the effects of thermal conductivity on the TCR between nonconforming rough surfaces. For similar contact materials, the TCR was abated with the augmentation of the thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

Steady‐state estimation of thermal contact conductance between sliding disk and stationary cylinder with similar/dissimilar materials under the isothermally heated boundary condition

2021

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An accurate understanding of the thermal contact conductance (TCC) is imperative for the enhancement of the performance and service life of metallic cylindrical joints. However, the evaluation of the TCC between conforming cylindrical solids is quite intricate, as it depends on the temperature, pressure, roughness, relative sliding speed, and thermophysical properties of solids. Instead of generating contacting surfaces stochastically, in this communication, an experimental setup in the lab-scale consisting of a stationary cylinder and a sliding hot disk has been fabricated in which temporal evolutions of the temperature on both solids are recorded by thermocouples. Effects of the disk | 8013

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Effects of thermal conductivity on the thermal contact resistance between non-conforming rough surfaces: An experimental and modeling study

Cited by 20 publications

References 18 publications

Near Room-Temperature Synthesis of Vertical Graphene Nanowalls on Dielectrics

Near Room-Temperature Synthesis of Vertical Graphene Nanowalls on Dielectrics

The effect of reducing the thermal contact resistance on the performance of battery thermal management system

Steady‐state estimation of thermal contact conductance between sliding disk and stationary cylinder with similar/dissimilar materials under the isothermally heated boundary condition

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