Microchannel surface terminal and heat transfer performance of manifold all-diamond

doi:10.13251/j.issn.0254-6051.2023.10.007

Abstract

Abstract: Diamond thick film was prepared by DC arc plasma spraying, and Z-type manifold-type all-diamond microchannel was formed by high-energy laser. The diamond microchannel was treated with hydrogen plasma, acid and fluorine plasma to obtain hydrogen-terminal, oxygen-terminal and fluorine-terminal. Through the two-phase heat transfer experiment, the change mechanism of the surface modification technology in the sustained stability of the diamond microchannel radiator was analyzed. The researches find that in the process of constant heat flow treatment, with the increase of operating time, the hydrophobic properties of the hydrogen-terminated diamond microchannels decrease rapidly and are not suitable for heat transfer research. The hydrophilic properties of the oxygen terminal decrease significantly and then tend to be stable. The fluorine-terminated surface is the most stable, and its hydrophobicity remains constant after a slight decrease in the initial stage. At the same time, it is found that the heat transfer of the oxygen terminal and fluorine terminal manifold diamond microchannels is dominated by nuclear boiling, including bubble flow and elastic flow. After further heating, a large number of bubbles converge to form annular flow, and the evaporation of thin film is the dominant mechanism. The hydrophobic fluorine terminal microchannel will accelerate the nucleation of bubbles, and the heat transfer performance is better than that of fluorine terminal in flow boiling state. The excessive bubble formation causes the occurrence of reverse flow, and the oxygen terminal microchannel can delay the occurrence of reverse flow, showing a higher boiling starting point and critical heat flux. The heat transfer coefficient of the fluorine terminal microchannel is higher than that of the oxygen terminal in boiling state, so the fluorine terminal can be more suitable for the surface modification technology of preparing hydrophobic diamond heat sink.

Key words: manifold type, all-diamond microchannel, terminal stability, heat transfer performance

CLC Number:

TG156.6

Feng Xurui, Wei Xinyi, Zhang Jianjun, Zheng Yuting, Chen Liangxian, Liu Jinlong, Li Chengming, Wei Junjun. Microchannel surface terminal and heat transfer performance of manifold all-diamond[J]. Heat Treatment of Metals, 2023, 48(10): 50-58.

References

[1]Deng D, Zeng L, Sun W. A review on flow boiling enhancement and fabrication of enhanced microchannels of microchannel heat sinks[J]. International Journal of Heat and Mass Transfer, 2021, 175(2): 121332-121373.
[2]Lin Y, Luo Y, Wang E N, et al. Enhancement of flow boiling heat transfer in microchannel using micro-fin and micro-cavity surfaces[J]. International Journal of Heat and Mass Transfer, 2021, 179(3): 121739-121752.
[3]Gilmore N, Menictas C, Timchenko V. Open manifold microchannel heat sink for high heat flux electronic cooling with a reduced pressure drop[J]. International Journal of Heat and Mass Transfer, 2020, 163: 120395-120409.
[4]刘孟奇, 王建强, 王宇. 不同掺杂设计对类金刚石涂层海水环境摩擦学性能的影响[J]. 金属热处理, 2020, 45(3): 186-190.
Liu Mengqi, Wang Jianqiang, Wang Yu. Effect of doping design on tribological performances of DLC coating in seawater[J]. Heat Treatment of Metals, 2020, 45(3): 186-190.
[5]Ahmadi A A, Arabbeiki M, Ali H M, et al. Configuration and optimization of a minichannel using water-alumina nanofluid by non-dominated sorting genetic algorithm and response surface method[J]. Nanomaterials, 2020, 10(5): 901-921.
[6]Mehdi B, Mohammad J, Marjan G. Efficacy of a hybrid nanofluid in a new microchannel heat sink equipped with both secondary channels and ribs[J]. Journal of Molecular Liquids, 2019, 273: 88-98.
[7]Heydari, AliAkbari, Omid A, et al. The effect of attack angle of triangular ribs on heat transfer of nanofluids in a microchannel[J]. Journal of Thermal Analysis and Calorimetry, 2018, 131(3): 2893-2912.
[8]Behnampour A, Akbari O A, Safaei M R, et al. Analysis of heat transfer and nanofluid fluid flow in microchannels with trapezoidal, rectangular and triangular shaped ribs[J]. Physica E: Low-dimensional Systems and Nanostructures, 2017, 91: 15-31.
[9]Jung S Y, Park H. Experimental investigation of heat transfer of Al₂O₃ nanofluid in a microchannel heat sink[J]. International Journal of Heat and Mass Transfer, 2021, 179: 121729-121739.
[10]Yang Q, Zhao J Q, Huang Y P, et al. A diamond made microchannel heat sink for high-density heat flux dissipation[J]. Applied Thermal Engineering, 2019, 158: 113804-113816.
[11]Yang Q, Miao J Y, Zhao J Q, et al. Flow boiling of ammonia in a diamond-made microchannel heat sink for high heat flux hotspots[J]. Journal of Thermal Science, 2020, 29(5): 241-252.
[12]Ansari D, Ji H J. A silicon-diamond microchannel heat sink for die-level hotspot thermal management[J]. Applied Thermal Engineering, 2021, 194(1): 117131-117146.
[13]Qi Z N, Zheng Y T, Zhu X H, et al. An ultra-thick all-diamond microchannel heat sink for single-phase heat transmission efficiency enhancement[J]. Vacuum, 2020, 177(1): 109377-109384.
[14]Qi Z N, Zheng Y T, Wei J J, et al. Surface treatment of an applied novel all-diamond microchannel heat sink for heat transfer performance enhancement[J]. Applied Thermal Engineering, 2020, 177(1): 115489-115502.
[15]Tu J L, Shi J D, Chen L X, et al. Surface termination of the diamond microchannel and single-phase heat transfer performance[J]. International Journal of Heat and Mass Transfer, 2022, 199: 123481-123490.
[16]Kromka A, Breza J, Kadlecikova M, et al. Identification of carbon phases and analysis of diamond/substrate interfaces by Raman spectroscopy[J]. Carbon, 2005, 43(2): 425-429.
[17]王宝和, 强伟丽, 于志家. 粗糙壁面上水纳米液滴润湿性的分子动力学模拟[J]. 河南化工, 2019, 36(9): 24-29.
Wang Baohe, Qiang Weili, Yu Zhijia. Molecular dynamics simulation of wetting properties of water nanodroplets on rough surfaces[J]. He Nan Chemical Industry, 2019, 36(9): 24-29.
[18]Cazabat A M, Stuart M. Dynamics of wetting: Effects of surface roughness[J]. The Journal of Physical Chemistry, 1986, 90(22): 5845-5849.
[19]Dan Z, Liu Z, Wang J, et al. Fabrication of dual-termination Schottky barrier diode by using oxygen-/fluorine-terminated diamond[J]. Applied Surface Science, 2018, 457(1): 411-416.
[20]刘峰斌, 陈文彬. 表面修饰金刚石薄膜导电性研究进展[J]. 功能材料, 2016, 47(12): 12050-12057.
Liu Fengbin, Chen Wenbin. Research progress on conductivity of surface-modified diamond films[J]. Journal of Functional Materials, 2016, 47(12): 12050-12057.
[21]Brown K J, Chartier E, Sweet E M, et al. Cleaning diamond surfaces using boiling acid treatment in a standard laboratory chemical hood[J]. Journal of Chemical Health and Safety, 2019, 26(6): 40-44.
[22]Li F N, Akhvlediani R, Kuntumalla M K, et al. Oxygen bonding configurations and defects on differently oxidized diamond surfaces studied by high resolution electron energy loss spectroscopy and X-ray photoelectron spectroscopy measurements[J]. Applied Surface Science, 2019, 465: 313-319.
[23]季根顺, 张育铭, 薛向军, 等. 碳纤维表面电镀铜层微观形貌表征及分析[J]. 金属热处理, 2017, 42(4): 163-166.
Ji Genshun, Zhang Yuming, Xue Xiangjun, et al. Characterization and analysis on microstructure of copper plating layer on carbon fiber surface[J]. Heat Treatment of Metals, 2017, 42(4): 163-166.
[24]Alba G, Villar M P, Alcántara R, et al. Surface states of (100) O-terminated diamond: Towards other 1× 1∶O reconstruction models[J]. Nanomaterials, 2020, 10(6): 1193-1208.
[25]王立达, 刘贵昌, 邓新绿. 氟化类金刚石膜结构、性能及应用[J]. 真空, 2005(3): 15-19.
Wang Lida, Liu Guichang, Deng Xinlü. Structure, properties and applications of diamond-like fluorinated carbon films[J]. Vacuum, 2005(3): 15-19.
[26]Wang Y F, Wang W, Wei J, et al. Electrochemical route to bio-compatible fluorine-terminated diamond surface[J]. Carbon, 2021, 176: 83-87.