Fabrication of co-continuous SiC/Al composites from novel SiC preforms with high porosity and controllable pore size
Fabrication of co-continuous SiC/Al composites from novel SiC preforms with high porosity and controllable pore size
复制标题
用具有高孔隙率和可控孔径的新型 SiC 预制件制备共连续 SiC/Al 复合材料
DOI：
10.1016/j.ceramint.2020.09.130
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发表时间：
2021
影响因子：
5.2
通讯作者：
Zhiguo Zhang
中科院分区：
文献类型：
--
作者：
Yicheng Jin;Biao Zhang;Qiang Liu;Zhaoxin Zhong;Haoqian Zhang;Feng Ye;Zhiguo Zhang
多孔SiC陶瓷的制备是制备双连续SiC/Al复合材料的关键技术，该复合材料是一种很有前途的电子封装和精密仪器材料。模压成型和冷冻铸造法制备的多孔陶瓷是应用最广泛的预制体。但是，前者的预制体具有高的固体含量，增加了复合材料的加工难度。后者具有不均匀的显微组织，这是不适合精密仪器。本文采用非水凝胶注模成型法制备了低固相含量、微观结构均匀的SiC预制体。此外，通过改变原粉粒度，可以轻松控制预制体的孔径（1.03-22.82 μm）。研究了预制体孔径对复合材料力学性能和热膨胀系数的影响。当预制体孔径为7.14 μm时，复合材料的弯曲强度和热膨胀系数分别为986.8 MPa和8.11 × 10−6/K（50 °C）。
The preparation of porous SiC ceramics is the key process for co-continuous SiC/Al composites, which are promising materials for electronic packaging and precision instrument. Porous ceramics prepared by mould pressing and freeze casting are the most widely used preforms. However, the former preforms own high solid loading, raising the machining difficulty of composites. The latter preforms possess nonuniform microstructure, which is inappropriate for precision instruments. In this work, SiC preforms with low solid loading and uniform microstructure were prepared by non-aqueous gelcasting. Moreover, the pore size of the preforms could be controlled easily (1.03–22.82 μm) by changing the raw powder size. The effects of preform pore size on the mechanical properties and thermal expansion coefficient of the composites were researched. When the preform with a proper pore size of 7.14 μm was applied, the flexural strength and thermal expansion coefficient of the composite were 986.8 MPa and 8.11 × 10−6/K (50 °C), respectively.
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影响因子：
5.2
作者：
Jin, Yicheng;Zhang, Biao;Zhang, Zhiguo
通讯作者：
Zhang, Zhiguo
影响因子：
9.4
作者：
Hoffman, M;Skirl, S;Rödel, J
通讯作者：
Rödel, J
DOI：
10.1111/j.1151-2916.2001.tb00764.x
发表时间：
2001-04-01
影响因子：
3.9
作者：
Kawai, C
通讯作者：
Kawai, C
影响因子：
3.9
作者：
R. Chen;Yong Huang;Chang-An Wang;Jianqiang Qi
通讯作者：
R. Chen;Yong Huang;Chang-An Wang;Jianqiang Qi
影响因子：
6.2
作者：
Ren, Shubin;Qu, Xuanhui;Shen, Xiaoyu
通讯作者：
Shen, Xiaoyu