Single-source-precursor synthesis and phase evolution of NbC–SiC–C ceramic nanocomposites with core−shell structured NbC@C and SiC@C nanoparticles
In the present work, novel NbC–SiC–C ceramic nanocomposite powders were successfully synthesized by a polymer-derived ceramic approach with the allylhydridopolycarbosilane (AHPCS) and niobium pentachloride (NbCl5) as starting materials. A single-source-precursor was first synthesized by chemical rea...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co. Ltd.
2022-01-01
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| Series: | Advanced Powder Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772834X21000099 |
| _version_ | 1828115437588578304 |
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| author | Zhaoju Yu Fen Li Qikun Zhu |
| author_facet | Zhaoju Yu Fen Li Qikun Zhu |
| author_sort | Zhaoju Yu |
| collection | DOAJ |
| description | In the present work, novel NbC–SiC–C ceramic nanocomposite powders were successfully synthesized by a polymer-derived ceramic approach with the allylhydridopolycarbosilane (AHPCS) and niobium pentachloride (NbCl5) as starting materials. A single-source-precursor was first synthesized by chemical reaction between AHPCS and NbCl5 and then pyrolyzed at 900 °C to obtain amorphous ceramic powders. After further annealing amorphous ceramics at higher temperatures in the range of 1100–1500 °C, the NbC–SiC–C ceramic nanocomposite powders were finally obtained. The single-source-precursor synthesis and polymer-to-ceramic transformation were characterized by Fourier transform infrared spectra (FT-IR) and thermal gravimetric analysis (TGA). The phase evolution of resulting ceramics was investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Interestingly, both the NbC@C and SiC@C core−shell structured nanoparticles were in-situ formed at 1300 °C to form NbC–SiC–C ceramic nanocomposites. With the highest NbCl5 content in the feed, the contents of NbC and β-SiC obtained by Rietveld refinement of the XRD patterns from the 1500 °C ceramics are 68.41 wt.% and 31.59 wt.%, respectively, indicating that the ultra-high temperature resistant NbC is the main phase. In general, the resultant NbC–SiC–C nanocomposite with NbC as main phase can be considered as candidate material for structure−function integrated applications in harsh environment. |
| first_indexed | 2024-04-11T12:40:06Z |
| format | Article |
| id | doaj.art-ca98b4424127485885242c24dd6734c3 |
| institution | Directory Open Access Journal |
| issn | 2772-834X |
| language | English |
| last_indexed | 2024-04-11T12:40:06Z |
| publishDate | 2022-01-01 |
| publisher | KeAi Communications Co. Ltd. |
| record_format | Article |
| series | Advanced Powder Materials |
| spelling | doaj.art-ca98b4424127485885242c24dd6734c32022-12-22T04:23:32ZengKeAi Communications Co. Ltd.Advanced Powder Materials2772-834X2022-01-0111100009Single-source-precursor synthesis and phase evolution of NbC–SiC–C ceramic nanocomposites with core−shell structured NbC@C and SiC@C nanoparticlesZhaoju Yu0Fen Li1Qikun Zhu2Corresponding author.; College of Materials, Key Laboratory of High Performance Ceramic Fibers (Xiamen University), Ministry of Education, Xiamen, 361005, ChinaCollege of Materials, Key Laboratory of High Performance Ceramic Fibers (Xiamen University), Ministry of Education, Xiamen, 361005, ChinaCollege of Materials, Key Laboratory of High Performance Ceramic Fibers (Xiamen University), Ministry of Education, Xiamen, 361005, ChinaIn the present work, novel NbC–SiC–C ceramic nanocomposite powders were successfully synthesized by a polymer-derived ceramic approach with the allylhydridopolycarbosilane (AHPCS) and niobium pentachloride (NbCl5) as starting materials. A single-source-precursor was first synthesized by chemical reaction between AHPCS and NbCl5 and then pyrolyzed at 900 °C to obtain amorphous ceramic powders. After further annealing amorphous ceramics at higher temperatures in the range of 1100–1500 °C, the NbC–SiC–C ceramic nanocomposite powders were finally obtained. The single-source-precursor synthesis and polymer-to-ceramic transformation were characterized by Fourier transform infrared spectra (FT-IR) and thermal gravimetric analysis (TGA). The phase evolution of resulting ceramics was investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Interestingly, both the NbC@C and SiC@C core−shell structured nanoparticles were in-situ formed at 1300 °C to form NbC–SiC–C ceramic nanocomposites. With the highest NbCl5 content in the feed, the contents of NbC and β-SiC obtained by Rietveld refinement of the XRD patterns from the 1500 °C ceramics are 68.41 wt.% and 31.59 wt.%, respectively, indicating that the ultra-high temperature resistant NbC is the main phase. In general, the resultant NbC–SiC–C nanocomposite with NbC as main phase can be considered as candidate material for structure−function integrated applications in harsh environment.http://www.sciencedirect.com/science/article/pii/S2772834X21000099Polymer-derived ceramicsNbCSiCCore-shell structureNanocomposites |
| spellingShingle | Zhaoju Yu Fen Li Qikun Zhu Single-source-precursor synthesis and phase evolution of NbC–SiC–C ceramic nanocomposites with core−shell structured NbC@C and SiC@C nanoparticles Advanced Powder Materials Polymer-derived ceramics NbC SiC Core-shell structure Nanocomposites |
| title | Single-source-precursor synthesis and phase evolution of NbC–SiC–C ceramic nanocomposites with core−shell structured NbC@C and SiC@C nanoparticles |
| title_full | Single-source-precursor synthesis and phase evolution of NbC–SiC–C ceramic nanocomposites with core−shell structured NbC@C and SiC@C nanoparticles |
| title_fullStr | Single-source-precursor synthesis and phase evolution of NbC–SiC–C ceramic nanocomposites with core−shell structured NbC@C and SiC@C nanoparticles |
| title_full_unstemmed | Single-source-precursor synthesis and phase evolution of NbC–SiC–C ceramic nanocomposites with core−shell structured NbC@C and SiC@C nanoparticles |
| title_short | Single-source-precursor synthesis and phase evolution of NbC–SiC–C ceramic nanocomposites with core−shell structured NbC@C and SiC@C nanoparticles |
| title_sort | single source precursor synthesis and phase evolution of nbc sic c ceramic nanocomposites with core shell structured nbc c and sic c nanoparticles |
| topic | Polymer-derived ceramics NbC SiC Core-shell structure Nanocomposites |
| url | http://www.sciencedirect.com/science/article/pii/S2772834X21000099 |
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