高导热金刚石/铝复合材料的高温高压制备

侯领 沈维霞 房超 张壮飞 张跃文 王倩倩 陈良超 贾晓鹏

侯领, 沈维霞, 房超, 张壮飞, 张跃文, 王倩倩, 陈良超, 贾晓鹏. 高导热金刚石/铝复合材料的高温高压制备[J]. 高压物理学报, 2020, 34(5): 053101. doi: 10.11858/gywlxb.20200514
引用本文: 侯领, 沈维霞, 房超, 张壮飞, 张跃文, 王倩倩, 陈良超, 贾晓鹏. 高导热金刚石/铝复合材料的高温高压制备[J]. 高压物理学报, 2020, 34(5): 053101. doi: 10.11858/gywlxb.20200514
HOU Ling, SHEN Weixia, FANG Chao, ZHANG Zhuangfei, ZHANG Yuewen, WANG Qianqian, CHEN Liangchao, JIA Xiaopeng. High Thermal Conductivity of Diamond/Al Composites via High Pressure and High Temperature Sintering[J]. Chinese Journal of High Pressure Physics, 2020, 34(5): 053101. doi: 10.11858/gywlxb.20200514
Citation: HOU Ling, SHEN Weixia, FANG Chao, ZHANG Zhuangfei, ZHANG Yuewen, WANG Qianqian, CHEN Liangchao, JIA Xiaopeng. High Thermal Conductivity of Diamond/Al Composites via High Pressure and High Temperature Sintering[J]. Chinese Journal of High Pressure Physics, 2020, 34(5): 053101. doi: 10.11858/gywlxb.20200514

高导热金刚石/铝复合材料的高温高压制备

doi: 10.11858/gywlxb.20200514
基金项目: 国家自然科学基金(11704340,11804305);河南省科技攻关项目(202102210198)
详细信息
    作者简介:

    侯 领(1992-),男,硕士研究生,主要从事高温高压合成研究. E-mail:1262310078@qq.com

    通讯作者:

    张壮飞(1985-),男,博士,讲师,主要从事高温高压合成研究. E-mail:zhangzf@zzu.edu.cn

    陈良超(1989-),男,博士,讲师,主要从事高温高压合成研究. E-mail:chenlc@zzu.edu.cn

  • 中图分类号: O521.3

High Thermal Conductivity of Diamond/Al Composites via High Pressure and High Temperature Sintering

  • 摘要: 以纯铝为基体,使用体积分数为50%的200 μm镀钛金刚石为填充材料,利用高温高压粉末冶金法在压力3 GPa、温度700 ℃条件下烧结10 min得到热导率为529 W/(m·K)的高导热金刚石/铝复合材料。通过光学显微镜和X射线衍射对镀钛金刚石的形貌和物性进行表征,并利用激光导热仪、扫描电镜和热膨胀仪对制备的金刚石/铝复合材料进行性能测试。研究发现,使用放电等离子体烧结制备的镀钛金刚石镀层成分主要是单质钛,并伴有少量碳化钛生成。通过对比在相同制备条件下没有经过镀覆处理的金刚石发现,使用镀钛金刚石能够有效提高金刚石/铝复合材料的热导率。同时,高温高压法能够制备全密度的金刚石/铝复合材料,有效提高铝基体与金刚石的界面结合,减少界面空隙,进而有效提高复合材料的热导率。相比真空热压、放电等离子体烧结、气压熔渗等常规方式,高温高压粉末冶金制备方式具有样品制备周期短(数分钟)的特点。此项研究有助于拓宽高导热复合材料的制备方式,同时能够扩大国内六面顶压机的产品种类,为其他金属基体导热复合材料的制备提供技术支持。

     

  • 图  金刚石(a)、铝粉(b)和钛粉(c)的外观形貌

    Figure  1.  Morphology of diamond particles (a),aluminum powders (b) and titanium powders (c)

    图  金刚石颗粒放电等离子体烧结30 min前(a)、后(b)对比

    Figure  2.  Optical image comparison before (a) and after (b) diamond particles treatment for 30 min by SPS

    图  金刚石/铝复合材料实验组装示意图:(a)高压组装块实物,(b)高压组装块示意图,(c)高压设备腔体示意图

    Figure  3.  Sample assembly for diamond/Al composites under high pressure conditions: (a) high pressure cell for composites fabrication, (b) assembly schematic diagram, (c) schematic diagram of high pressure apparatus

    图  镀钛金刚石的X射线衍射图谱

    Figure  4.  XRD pattern of Ti-coated diamond particles

    图  金刚石颗粒形貌:(a)原材料金刚石,(b)镀钛金刚石,(c)镀钛金刚石扫描电镜图像,(d)镀钛金刚石表面局部放大图像

    Figure  5.  Morphology of diamond particles: (a) raw diamond,(b) Ti-coated diamond,(c) SEM of Ti-coated diamond,(d) the surface of Ti-coated diamond

    图  金刚石/铝复合材料断裂面扫描电镜图像:未镀钛金刚石(a)~(b),镀钛金刚石(c)~(d)

    Figure  6.  SEM images of fracture surfaces of the diamond/Al composites with diamond of un-coated (a),(b)and Ti-coated (c),(d)

    图  镀钛金刚石/铝复合材料界面扫描电镜结果和元素分布:(a)界面结合部位,(b)铝,(c)金刚石,(d)钛

    Figure  7.  SEM images of the interface between diamond particles and Al matrix in the diamond/Al composites with Ti-coated on diamond particles:(a) interface area, (b) Al, (c) diamond, (d) Ti

    图  金刚石/铝复合材料的热学性能:(a)热扩散系数,(b)热导率

    Figure  8.  Thermal properties of the diamond/Al composites: (a) thermal diffusion coefficient,(b) thermal conductivity

    图  未镀钛和镀钛制备的金刚石/铝复合材料的变温伸长率(a)和热膨胀系数(b)

    Figure  9.  Relative elongations (a)and CTEs (b)of diamond/Al composites reinforced with uncoated and Ti-coated diamond particles

    表  1  金刚石/铝复合材料的密度和致密度

    Table  1.   Density and relative density of diamond/Al composites

    Diamond typeDensity of composites/(g·cm−3)Relative density of composites/%
    Raw3.0698.40
    Ti-coated3.11100.00
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  • 收稿日期:  2020-02-24
  • 修回日期:  2020-03-03

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