3D Printing of Polymer-Derived Graphene/SiC<sub>p</sub>/SiC Composite by Direct Ink Writing
The direct ink writing (DIW) process has been successfully used to prepare SiC-based composites from preceramic polymers due to the porous light weight, lower sintering temperature, and tailored design. However, it still presents challenges in improving the mechanical properties of composites and en...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-12-01
|
| Series: | Crystals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4352/15/1/11 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832588767229116416 |
|---|---|
| author | Hongjun Liu Yajun Li Run Tang Yamin Li |
| author_facet | Hongjun Liu Yajun Li Run Tang Yamin Li |
| author_sort | Hongjun Liu |
| collection | DOAJ |
| description | The direct ink writing (DIW) process has been successfully used to prepare SiC-based composites from preceramic polymers due to the porous light weight, lower sintering temperature, and tailored design. However, it still presents challenges in improving the mechanical properties of composites and endowing them with multifunctionality. In this study, we present a 3D-printing strategy for preparing a graphene/SiC<sub>p</sub>/SiC composite using the DIW process. A polycarbosilane (PCS)-based slurry containing graphene/SiC<sub>p</sub> composite powder was developed and 3D-printed into scaffolds with a lattice structure, which were then pyrolyzed at 1500 °C to obtain a graphene/SiC<sub>p</sub>/SiC composite. The weight loss, viscosity, and printability of the graphene/SiC<sub>p</sub>/PCS slurry were evaluated, and it was determined that the slurry after 4 h of magnetic stirring was suitable for the DIW process. When heat-treated at above 800 °C in an N<sub>2</sub> atmosphere, PCS was first reacted with SiC<sub>x</sub>O<sub>y</sub>, which was further transformed into β-SiC and pyrocarbon. The 3D-printed lattice structure achieved porosity and low density, while the SiC<sub>p</sub> reduced defects caused by large shrinkage during pyrolysis of PCS. Meanwhile, GNPs provided the composites with better conductivity and lower density. The density was as low as 1.08 g/cm<sup>3</sup>, the conductivity reached 670 S·m<sup>−1</sup>, and the compressive strength was 4.3 MPa. Thus, a lightweight and porous SiC-based composite with high conductivity and strength can be prepared. |
| format | Article |
| id | doaj-art-54fb1bd6651f4577929c52c6d98dd4f3 |
| institution | Kabale University |
| issn | 2073-4352 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj-art-54fb1bd6651f4577929c52c6d98dd4f32025-01-24T13:28:00ZengMDPI AGCrystals2073-43522024-12-011511110.3390/cryst150100113D Printing of Polymer-Derived Graphene/SiC<sub>p</sub>/SiC Composite by Direct Ink WritingHongjun Liu0Yajun Li1Run Tang2Yamin Li3School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, ChinaSchool of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, ChinaSchool of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, ChinaSchool of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, ChinaThe direct ink writing (DIW) process has been successfully used to prepare SiC-based composites from preceramic polymers due to the porous light weight, lower sintering temperature, and tailored design. However, it still presents challenges in improving the mechanical properties of composites and endowing them with multifunctionality. In this study, we present a 3D-printing strategy for preparing a graphene/SiC<sub>p</sub>/SiC composite using the DIW process. A polycarbosilane (PCS)-based slurry containing graphene/SiC<sub>p</sub> composite powder was developed and 3D-printed into scaffolds with a lattice structure, which were then pyrolyzed at 1500 °C to obtain a graphene/SiC<sub>p</sub>/SiC composite. The weight loss, viscosity, and printability of the graphene/SiC<sub>p</sub>/PCS slurry were evaluated, and it was determined that the slurry after 4 h of magnetic stirring was suitable for the DIW process. When heat-treated at above 800 °C in an N<sub>2</sub> atmosphere, PCS was first reacted with SiC<sub>x</sub>O<sub>y</sub>, which was further transformed into β-SiC and pyrocarbon. The 3D-printed lattice structure achieved porosity and low density, while the SiC<sub>p</sub> reduced defects caused by large shrinkage during pyrolysis of PCS. Meanwhile, GNPs provided the composites with better conductivity and lower density. The density was as low as 1.08 g/cm<sup>3</sup>, the conductivity reached 670 S·m<sup>−1</sup>, and the compressive strength was 4.3 MPa. Thus, a lightweight and porous SiC-based composite with high conductivity and strength can be prepared.https://www.mdpi.com/2073-4352/15/1/11composites3D printingdirect ink writingpolycarbosilanespyrolysisgraphene |
| spellingShingle | Hongjun Liu Yajun Li Run Tang Yamin Li 3D Printing of Polymer-Derived Graphene/SiC<sub>p</sub>/SiC Composite by Direct Ink Writing Crystals composites 3D printing direct ink writing polycarbosilanes pyrolysis graphene |
| title | 3D Printing of Polymer-Derived Graphene/SiC<sub>p</sub>/SiC Composite by Direct Ink Writing |
| title_full | 3D Printing of Polymer-Derived Graphene/SiC<sub>p</sub>/SiC Composite by Direct Ink Writing |
| title_fullStr | 3D Printing of Polymer-Derived Graphene/SiC<sub>p</sub>/SiC Composite by Direct Ink Writing |
| title_full_unstemmed | 3D Printing of Polymer-Derived Graphene/SiC<sub>p</sub>/SiC Composite by Direct Ink Writing |
| title_short | 3D Printing of Polymer-Derived Graphene/SiC<sub>p</sub>/SiC Composite by Direct Ink Writing |
| title_sort | 3d printing of polymer derived graphene sic sub p sub sic composite by direct ink writing |
| topic | composites 3D printing direct ink writing polycarbosilanes pyrolysis graphene |
| url | https://www.mdpi.com/2073-4352/15/1/11 |
| work_keys_str_mv | AT hongjunliu 3dprintingofpolymerderivedgraphenesicsubpsubsiccompositebydirectinkwriting AT yajunli 3dprintingofpolymerderivedgraphenesicsubpsubsiccompositebydirectinkwriting AT runtang 3dprintingofpolymerderivedgraphenesicsubpsubsiccompositebydirectinkwriting AT yaminli 3dprintingofpolymerderivedgraphenesicsubpsubsiccompositebydirectinkwriting |