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高导热碳/碳复合材料表面高发射率涂层的制备及性能

薛正航 张守阳 张若茜 宋强 刘文琪

薛正航, 张守阳, 张若茜, 等. 高导热碳/碳复合材料表面高发射率涂层的制备及性能[J]. 复合材料学报, 2024, 42(0): 1-11.
引用本文: 薛正航, 张守阳, 张若茜, 等. 高导热碳/碳复合材料表面高发射率涂层的制备及性能[J]. 复合材料学报, 2024, 42(0): 1-11.
XUE Zhenghang, ZHANG Shouyang, ZHANG Ruoqian, et al. Preparation and Properties of High Emissivity Coatings on the Surface of High Thermal Conductivity Cabon/carbon Composites[J]. Acta Materiae Compositae Sinica.
Citation: XUE Zhenghang, ZHANG Shouyang, ZHANG Ruoqian, et al. Preparation and Properties of High Emissivity Coatings on the Surface of High Thermal Conductivity Cabon/carbon Composites[J]. Acta Materiae Compositae Sinica.

高导热碳/碳复合材料表面高发射率涂层的制备及性能

基金项目: 国家自然科学基金重点项目(U21 B2067)
详细信息
    通讯作者:

    张守阳,教授,博士生导师,研究方向为碳/碳复合材料CVI工艺 E-mail: zhangshouyang@mail.nwpu.edu.cn

    宋强,研究员,博士生导师,研究方向为微纳米尺度耐高温碳基复合材料 E-mail: songqiang@mail.nwpu.edu.cn

  • 中图分类号: TB332

Preparation and Properties of High Emissivity Coatings on the Surface of High Thermal Conductivity Cabon/carbon Composites

Funds: Key project of National Natural Science Foundation of China(U21 B2067)
  • 摘要: 高导热碳/碳(HTC-C/C)复合材料表面的红外发射率较低,导致其辐射散热能力较差,为进一步提高其热管控能力,需要在其表面涂覆高发射率涂层。通过使用压缩空气喷涂法在HTC-C/C复合材料表面制备了兼具高红外辐射和抗热震性能的碳纳米管(CNTs)/炭黑(CB)复合涂层,在沉积一定量的热解碳(PyC)后,使涂层在保持高红外发射率的同时获得了更强的界面结合性能。探究了热震和高温热处理对高发射率涂层组织和性能的影响。结果表明,当CNTs与CB质量比达到最优比例时,制备得到的涂层发射率达0.94以上,经60次300℃↔−196℃热循环的抗热震性能测试后未发生开裂和剥落现象,具有良好的热稳定性。涂层中的纳米碳材料在热处理后微观有序程度发生改变,导致涂层发射率呈现波长依赖性,但是由于各个波段的协同作用,全测试波段(1-22 μm)发射率波动较小。

     

  • 图  1  不同原料配比的CNTs/CB复合涂层SEM图及孔隙分布统计图

    Figure  1.  SEM images of composite coating with different material ratios (a,b,i)CNTS/CB-1;(c,d,j) CNTS/CB-2;(e,f,k)CNTS/CB-3;(g,h,l) CNTS/CB-4

    图  2  不同CNTs/CB样品的表面形貌测试

    Figure  2.  Surface morphology test of different CNTs/CB samples (a)CNTS/CB-1;(b)CNTS/CB-2;(c)CNTS/CB-3;(d)CNTS/CB-4

    图  3  不同CNTs/CB样品的红外发射率曲线

    Figure  3.  Infrared emissivity curves of different CNTs/CB samples

    图  4  不同CNTs/CB样品沉积15分钟PyC后的SEM图

    Figure  4.  SEM images of different CNTs/CB samples after deposited 15 min pyrolytic carbon (a,b)CNTs/CB-PyC-1;(c,d)CNTs/CB-PyC-2;(e,f)CNTs/CB-PyC-3;(g,h)CNTs/CB-PyC-4

    图  5  沉积15 min PyC后不同样品的红外发射率曲线

    Figure  5.  Infrared emissivity curves of different samples after 15 min PyC deposition

    图  6  沉积15 min PyC的不同样品经热震实验后的SEM图

    Figure  6.  SEM images of different PyC samples deposited for 15 min after cycling experiment (a)CNTs/CB-PyC-1;(b) CNTs/CB-PyC-2;(c)CNTs/CB-PyC-3;(d) CNTs/CB-PyC-4

    图  7  沉积15 min PyC后各样品划痕测试结合力

    Figure  7.  After deposition of PyC for 15 min, the binding force of each sample was tested by scratches

    图  8  (a) CNTs/CB-PyC复合涂层高温下的红外发射率 (b) CNTs/CB-PyC复合涂层经不同温度热处理后室温下的红外发射率

    Figure  8.  (a) Infrared emissivity of CNTs/CB-PyC composite coatings at high temperature (b)Infrared emissivity of CNTs/CB-PyC composite coatings at room temperature after heat treatment at different temperatures

    图  9  CNTs/CB-PyC-3样品的XRD与拉曼测试结果

    Figure  9.  XRD and Raman test curves of CNTs/CB-PyC-3 at different heat treatment temperatures (a,c)CB;(b,d)CNTs

    图  10  HTC-C/C复合材料喷涂涂层前后的红外热像仪照片

    Figure  10.  Infrared thermal camera photos before and after HTC-C/C composite coating

    表  1  复合涂层的主要组分质量比

    Table  1.   Mass ratios of main components of composite coatings

    Mass RatioIsopropanol
    (IPA)
    Carbon nanotube
    (CNTs)
    Carbon black (CB)Sodium dodecyl
    benzene sulfonate (SDBS)
    phenolic resin (PF)
    Samples
    CNTs/CB-1100041632
    CNTs/CB-2100081232
    CNTs/CB-3100012832
    CNTs/CB-4100016432
    Notes: The above ratio is the mass ratio of each component in the slurry used for spraying. Only the proportion of CNTs and CB is different, and other conditions are the same.
    下载: 导出CSV
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  • 收稿日期:  2024-06-20
  • 修回日期:  2024-08-16
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