Selective Laser Sintering of SiC Green Body with Low Binder Content

doi:10.15541/jim20210699

Journal of Inorganic Materials ›› 2022, Vol. 37 ›› Issue (3): 347-352.DOI: 10.15541/jim20210699

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Selective Laser Sintering of SiC Green Body with Low Binder Content

HUANG Longzhi¹^,²(), YIN Jie¹^,²(), CHEN Xiao¹^,², WANG Xinguang³, LIU Xuejian¹(), HUANG Zhengren¹^,⁴

1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
2. College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100864, China
3. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
4. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China

Received:2021-11-11 Revised:2021-12-27 Published:2022-03-20 Online:2022-03-07
Contact: YIN Jie, associate professor. E-mail: jieyin@mail.sic.ac.cn; LIU Xuejian, professor. E-mail: xjliu@mail.sic.ac.cn
About author:HUANG Longzhi (1996-), male, Master candidate. E-mail: sichlz@163.com
Supported by:
National Natural Science Foundation of China(52073299);National Natural Science Foundation of China(52172077);National Natural Science Foundation of China(51602325);National Natural Science Foundation of China(91960102);Youth Innovation Promotion Association, Chinese Academy of Sciences(2018289)

Abstract

Abstract:

Belonging to the family of SiC-based composites, Al/SiC has excellent mechanical and thermal properties, making it irreplaceable in high-power electronic devices, key cooling components of 5G base station, electric vehicles, high-speed brake pads, space probe operation devices, and other related fields featured by high technologies. The melt infiltration method, which can achieve near-net forming, has been recognized to be a favorable method for preparing Al/SiC composites to overcome the disadvantages of traditional processing. How to obtain a high-quality silicon carbide (SiC) ceramic green body is a key for the perfect melt infiltration method. Selective laser sintering (SLS) technology provides a new opportunity for a top grade ceramic forming process, which is rapid and efficient in realizing large-scale and complicated-shape without cast molding. Here, the SiC green body was obtained by SLS technique with thermoplastic phenolic resin as binder and its content lower than 15% (in volume) for the subsequent procedure to fabricate composite materials. However, low binder content results in low flexural strength. As the resin content increases to 25% (in volume), the strength of the SiC green body reaches 3.77 MPa with a strength increment of 702.1% for the SLS SiC green body. Spray drying was applied to form more spherical powder. Nevertheless, the porosity of the SiC green body is still high (71.18%), due to porous microstructure remaining in spray-dried powder, which leads to deteriorated strength of the green body.

Key words: Al/SiC, selective laser sintering, green body, microstructure

CLC Number:

TQ174

HUANG Longzhi, YIN Jie, CHEN Xiao, WANG Xinguang, LIU Xuejian, HUANG Zhengren. Selective Laser Sintering of SiC Green Body with Low Binder Content[J]. Journal of Inorganic Materials, 2022, 37(3): 347-352.

Figures/Tables 5

References 16

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Selective Laser Sintering of SiC Green Body with Low Binder Content

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