金刚石–SiC/Al复合材料的构型设计与导热性能

康惠元; 康翱龙; 焦增凯; 王熹; 周科朝; 马莉; 邓泽军; 王一佳; 余志明; 魏秋平

doi:10.13394/j.cnki.jgszz.2022.0015

金刚石–SiC/Al复合材料的构型设计与导热性能

doi: 10.13394/j.cnki.jgszz.2022.0015

1.
中南大学材料科学与工程学院, 长沙410083
2.
中南大学, 粉末冶金国家重点实验室, 长沙410083
3.
中南大学, 高等研究中心, 长沙410083

基金项目: 国家十四五重点研究发展计划（2021YFB3701800）；国家自然科学基金（52071345，51874370，51601226）；广东省十三五重点研究开发项目（2020B01085001）；湖南省高新技术产业科技创新引领计划（2022GK4037，2022GK4047）。

详细信息

通讯作者:
魏秋平，男，1980年生，博士、教授。主要研究方向：薄膜材料和表面改性技术。E-mail：qiupwei@csu.edu.cn

中图分类号: TQ164; TB333
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- 被引次数: 0
出版历程
- 收稿日期: 2022-03-07
- 修回日期: 2022-05-13
- 刊出日期: 2022-10-16

Configuration design and thermal conductivity of diamond-SiC/Al composites

1.
School of Materials Science and Engineering, Central South University, Changsha 410083, China
2.
State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
3.
Center for Advanced Studies, Central South University, Changsha 410083, China

摘要

摘要: 以SiC和镀钨金刚石增强体为原料制备预制体，通过气压浸渗技术在800 ℃，5 MPa条件下制备金刚石–SiC/Al复合材料。利用扫描电镜、红外热成像仪、激光导热仪等对复合材料性能进行分析，研究SiC和金刚石的含量与粒径比对复合材料构型的影响，从而优化复合材料导热性能。结果表明：在相同的SiC粒径下，金刚石体积分数的增加将使复合材料的导热性能明显提升。当金刚石体积分数为30%时，含F100 SiC的复合材料导热性能最佳，其热导率为344 W/(m∙K)。当金刚石体积分数相同，粒径比从0.07增大到0.65时，复合材料导热性能依次提升；且在金刚石体积分数为15%时，复合材料的热导率增幅最大，从174 W/(m∙K)增大到274 W/(m∙K)，增长了57%。通过改善金刚石–SiC/Al复合材料中增强体的含量和粒径比可以调控复合材料构型，充分发挥复合材料的导热潜力。
- 金刚石–SiC/Al复合材料 /
- 气压浸渗法 /
- 复合构型 /
- 热导率
Abstract: The preforms were prepared with SiC and W-coated diamond reinforcements, and the diamond-SiC/Al composites were prepared by gas pressure infiltration technology at 800 ℃ and 5 MPa. The properties of composite materials were analyzed by scanning electron microscope, infrared thermal imager and laser thermal conductivity meter. The influences of the content and the particle size ratio R of SiC and diamond on the configuration of composites were investigated to optimize the thermal conductivity of the composites. The results show that with the same SiC particle size, the thermal conductivity of the composites will be significantly improved with the increase of diamond volume fraction. When the volume fraction of diamond is 30%, the thermal conductivity of the composites containing F100 SiC is the best, which reaches 344 W/(m∙K). When the volume fraction of diamond is the same and the particle size ratio R increases from 0.07 to 0.65, the thermal conductivity of the composite increases in turn. Moreover, the thermal conductivity of composites with diamond volume fraction of 15% increases from 174 W/(m∙K) to 274 W/(m∙K), which achieves the largest increase of 57%.Therefore, by improving the content and the particle size ratio of reinforcements in the diamond-SiC/Al composites, the configuration of composites can be regulated to realize full potential of thermal conductivity.
- diamond-SiC/Al composite /
- gas pressure infiltration /
- composite configuration /
- thermal conductivity

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图 1 复合材料的XRD图谱

Figure 1. XRD patterns of composites

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图 2 金刚石–SiC/Al复合材料的表面形貌

Figure 2. Surface topographies of diamond-SiC/Al composite

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图 3 金刚石–SiC/Al复合材料的断口形貌及元素分布

Figure 3. Fracture morphologies and element distributions of diamond-SiC/Al composite

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图 4 金刚石–SiC/Al复合材料的红外热成像图

Figure 4. Infrared thermal images of diamond-SiC/Al composites

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图 5 S1~S3样品的平均温度随时间的变化

Figure 5. Variation of average temperatures of S1~S3 sample with times

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图 6 金刚石–SiC/Al复合材料的热导率

Figure 6. Thermal conductivity of diamond-SiC/Al composites

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图 7 不同粒径的复合材料的红外热成像图

Figure 7. Infrared thermographic of composite materials with different particle sizes

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图 8 S3，S6，S9样品的表面平均温度随时间的变化

Figure 8. Variation of average surface temperatures of S3, S6 and S9 samples with times

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图 9 不同粒径比的复合材料热导率

Figure 9. Thermal conductivities of composites with different particle size ratios

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表 1 复合材料中增强体粒径及体积分数

Table 1. Reinforcement particle sizes and volume fractions in composites

样品编号	金刚石体积分数 φ₁ / %	SiC体积分数 φ₂ / %	SiC颗粒粒径 d₀ / μm	SiC粒度代号
S1	0	77	150	F100
S2	15	62	150	F100
S3	30	47	150	F100
S4	0	77	58	F200
S5	15	62	58	F200
S6	30	47	58	F200
S7	0	77	17	F500
S8	15	62	17	F500
S9	30	47	17	F500

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