纳米晶TaZr<sub>2.75</sub>C<sub>3.75</sub>固溶陶瓷粉末的制备与表征

doi:10.19976/j.cnki.43-1448/TF.2022019

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Abstract Single-phase solid solution ceramic powders TaZr_2.75C_3.75 were synthesized by combining solvothermal and carbothermal reduction. In which, TaCl₅ and ZrCl₄were used as the tantalum and zirconium source respectively and phenolic resin was used as the carbon source. The possibility of the synthesis of TaZr_2.75C_3.75 powders by the carbothermal reduction method was demonstrated by thermodynamic and atomic size effect. The effects of process parameters such as acetylacetone content, metal atom concentration and solvent type on the powder morphology and particle size were investigated. The results show that the single-phase TaZr_2.75C_3.75 solid solution ceramic powders can be prepared by the carbothermal reduction reaction at 1 700 ℃. Increasing the content of acetylacetone can improve the dispersibility of the powders. With increasing the concentration of metal atoms, the powder changes from a spherical shape to an irregular shape, and the average particle size decreases from the micron level (~2.13 µm) to the submicron level (~0.140 µm). Compared witn butanol solvent, better dispersion and smaller particle size of TaZr_2.75C_3.75 solid solution ceramic powders can be achieved with ethanol as a solvent.

Key words： solvothermal carbothermal reaction carbide single-phase solid solution nanocrystal

Received: 11 March 2022 Published: 14 September 2022

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	JANG Jie
	YI Maozhong
	ZHOU Yuanming
	PENG Ke

Cite this article:

JANG Jie,YI Maozhong,ZHOU Yuanming, et al. Preparation and characterization of nanocrystalline TaZr_2.75C_3.75 solid solution ceramic powder[J]. Materials Science and Engineering of Powder Metallurgy, 2022, 27(4): 426-435.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2022019 OR http://pmbjb.csu.edu.cn/EN/Y2022/V27/I4/426

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