Synthesis of Ti3SiC2 Phase from Polycarbosilane Precursor |
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| Authors: | Luo Yongming Zongbo Zhang Xiujun Wang Xuening Mei Zhimin Zheng Caihong Xu |
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| Affiliation: | Beijing National Laboratory of Molecular Science (BNLMS), Institute of Chemistry, Chinese Academy of Science, Beijing, 100080, People's Republic of China |
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| Abstract: | Ti3SiC2 phase was synthesized by reactive pyrolysis of three different polycarbosilane, [Si(H)2CH2]m·[(H)Si(Vi)CH2]n·[(H)Si(Me)CH2]p (AHPCS), [Si(CH3)2CH2]x·[Si(H)(CH3)CH2]y (PCS), and [Me(H)SiC≡C]n, filled with metal Ti powder. The pyrolysis was carried out in argon atmosphere between 1200°C and 1400°C. The metal–precursor reactions and phase evolution during the pyrolysis were studied by means of X-ray diffraction and scanning electron microscopy. The results indicated that PCS/Ti system was more beneficial for the synthesis of Ti3SiC2. In addition, the high-purity Ti3SiC2 could be synthesized through the pyrolysis of green compact of the PCS/Ti system with CaF2 at 1400°C. |
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