Mei Yang, Ming-li L?u, Hong-min Zhu. Preparation and Characterization of Si3N4-TiN Nanocomposite via in situ Co-deposition in Liquid Ammonia[J]. Chinese Journal of Chemical Physics , 2007, 20(6): 717-740. doi: 10.1088/1674-0068/20/06/717-720
Citation: Mei Yang, Ming-li L?u, Hong-min Zhu. Preparation and Characterization of Si3N4-TiN Nanocomposite via in situ Co-deposition in Liquid Ammonia[J]. Chinese Journal of Chemical Physics , 2007, 20(6): 717-740. doi: 10.1088/1674-0068/20/06/717-720

Preparation and Characterization of Si3N4-TiN Nanocomposite via in situ Co-deposition in Liquid Ammonia

doi: 10.1088/1674-0068/20/06/717-720
Funds:  This work was supported by the National Basic Research Program of China (No.2007CB613301) and the National Natural Science Foundation of China (No.50374007).
  • Received Date: 2007-08-30
  • Rev Recd Date: 2007-09-04
  • "A new method of TiN/Si3N4 nanocomposite synthesis was described and tested. TiCl4 and SiCl4 used as the starting materials and sodium as the reduction agent were conducted in liquid ammonia respectively. TiCl4 and SiCl4 were reduced simultaneously and titanium nitride/silicon nitride nanocomposite powderswere obtained by in situ co-deposition at temperatures around ~ 45 oC. X-ray diffraction patterns indicate that the product was amorphous and the by-product was sodium chloride. The product powders were heated up to 1600 oC and crystallization to TiN and fi-Si3N4 happened. Due to presence of TiN, the crystallization of silicon nitride in the mixture was later than that of pure silicon nitride. Transmission electron microscopy images show the average size of powders range from 10 nm to 40 nm and scanning electron microscopy images conformed that Ti and Si elements were dispersed uniformly. A green bulk nitride composite containing 20%TiN with the mean grain size of 100-300 nm and fracture toughness of 10.1§1.1 m1=2MPa , was obtained by spark plasma sintering at 1500-1600 oC. The effect of TiN additiven microstructure and mechanical properties of composite bulk was discussed."
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Preparation and Characterization of Si3N4-TiN Nanocomposite via in situ Co-deposition in Liquid Ammonia

doi: 10.1088/1674-0068/20/06/717-720
Funds:  This work was supported by the National Basic Research Program of China (No.2007CB613301) and the National Natural Science Foundation of China (No.50374007).

Abstract: "A new method of TiN/Si3N4 nanocomposite synthesis was described and tested. TiCl4 and SiCl4 used as the starting materials and sodium as the reduction agent were conducted in liquid ammonia respectively. TiCl4 and SiCl4 were reduced simultaneously and titanium nitride/silicon nitride nanocomposite powderswere obtained by in situ co-deposition at temperatures around ~ 45 oC. X-ray diffraction patterns indicate that the product was amorphous and the by-product was sodium chloride. The product powders were heated up to 1600 oC and crystallization to TiN and fi-Si3N4 happened. Due to presence of TiN, the crystallization of silicon nitride in the mixture was later than that of pure silicon nitride. Transmission electron microscopy images show the average size of powders range from 10 nm to 40 nm and scanning electron microscopy images conformed that Ti and Si elements were dispersed uniformly. A green bulk nitride composite containing 20%TiN with the mean grain size of 100-300 nm and fracture toughness of 10.1§1.1 m1=2MPa , was obtained by spark plasma sintering at 1500-1600 oC. The effect of TiN additiven microstructure and mechanical properties of composite bulk was discussed."

Mei Yang, Ming-li L?u, Hong-min Zhu. Preparation and Characterization of Si3N4-TiN Nanocomposite via in situ Co-deposition in Liquid Ammonia[J]. Chinese Journal of Chemical Physics , 2007, 20(6): 717-740. doi: 10.1088/1674-0068/20/06/717-720
Citation: Mei Yang, Ming-li L?u, Hong-min Zhu. Preparation and Characterization of Si3N4-TiN Nanocomposite via in situ Co-deposition in Liquid Ammonia[J]. Chinese Journal of Chemical Physics , 2007, 20(6): 717-740. doi: 10.1088/1674-0068/20/06/717-720

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