Facile synthesis of fine Ti–Al intermetallic compound powders via sodiothermic reduction in molten CaCl2

Chao Du; Jiusan Xiao; Bao Zhang; Hongmin Zhu

doi:10.1016/j.intermet.2020.107038

Facile synthesis of fine Ti–Al intermetallic compound powders via sodiothermic reduction in molten CaCl₂

Chao Du, Jiusan Xiao, Bao Zhang, Hongmin Zhu

ENG - Metallurgy

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Fine powders of titanium aluminides, the Ti–Al intermetallic compounds were directly synthesized via sodiothermic reduction of TiO₂/Al₂O₃ composites in molten CaCl₂. By using uniformly ball milled TiO₂/Al₂O₃ composites, all types of titanium aluminides (Ti₃Al, TiAl and TiAl₃) were successfully synthesized in strictly single phase of the all product powders. Through this synthesis method, the composition of Ti–Al alloy powders is tunable in the entail range of the binary system, and the all composition is uniformed in the all particles. The average particle size of the product powders was in the range of some hundreds of nanometers. The oxygen content in the product powders was proportional to its specific surface area, and was reduced down to less than 1500 ppm when reacted at 1373 K for 72 h.

Original language	English
Article number	107038
Journal	Intermetallics
Volume	129
DOIs	https://doi.org/10.1016/j.intermet.2020.107038
Publication status	Published - 2021 Feb

Keywords

Co-reduction
Molten CaCl
Oxygen content
Ti–Al intermetallics

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10.1016/j.intermet.2020.107038

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title = "Facile synthesis of fine Ti–Al intermetallic compound powders via sodiothermic reduction in molten CaCl2",

abstract = "Fine powders of titanium aluminides, the Ti–Al intermetallic compounds were directly synthesized via sodiothermic reduction of TiO2/Al2O3 composites in molten CaCl2. By using uniformly ball milled TiO2/Al2O3 composites, all types of titanium aluminides (Ti3Al, TiAl and TiAl3) were successfully synthesized in strictly single phase of the all product powders. Through this synthesis method, the composition of Ti–Al alloy powders is tunable in the entail range of the binary system, and the all composition is uniformed in the all particles. The average particle size of the product powders was in the range of some hundreds of nanometers. The oxygen content in the product powders was proportional to its specific surface area, and was reduced down to less than 1500 ppm when reacted at 1373 K for 72 h.",

keywords = "Co-reduction, Molten CaCl, Oxygen content, Ti–Al intermetallics",

author = "Chao Du and Jiusan Xiao and Bao Zhang and Hongmin Zhu",

note = "Funding Information: This work was financially supported by the Doctor's Start-up Research Foundation of Anhui University of Science and Technology, China (Grant No. 11285) and the Pre Research Project for NSFC of Anhui University of Science and Technology, China (Grant No. 12357). Funding Information: This work was financially supported by the Doctor's Start-up Research Foundation of Anhui University of Science and Technology, China (Grant No. 11285 ) and the Pre Research Project for NSFC of Anhui University of Science and Technology, China (Grant No. 12357 ). Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2021",

month = feb,

doi = "10.1016/j.intermet.2020.107038",

language = "English",

volume = "129",

journal = "Intermetallics",

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AU - Du, Chao

AU - Xiao, Jiusan

AU - Zhang, Bao

AU - Zhu, Hongmin

N1 - Funding Information: This work was financially supported by the Doctor's Start-up Research Foundation of Anhui University of Science and Technology, China (Grant No. 11285) and the Pre Research Project for NSFC of Anhui University of Science and Technology, China (Grant No. 12357). Funding Information: This work was financially supported by the Doctor's Start-up Research Foundation of Anhui University of Science and Technology, China (Grant No. 11285 ) and the Pre Research Project for NSFC of Anhui University of Science and Technology, China (Grant No. 12357 ). Publisher Copyright: © 2020 Elsevier Ltd

PY - 2021/2

Y1 - 2021/2

N2 - Fine powders of titanium aluminides, the Ti–Al intermetallic compounds were directly synthesized via sodiothermic reduction of TiO2/Al2O3 composites in molten CaCl2. By using uniformly ball milled TiO2/Al2O3 composites, all types of titanium aluminides (Ti3Al, TiAl and TiAl3) were successfully synthesized in strictly single phase of the all product powders. Through this synthesis method, the composition of Ti–Al alloy powders is tunable in the entail range of the binary system, and the all composition is uniformed in the all particles. The average particle size of the product powders was in the range of some hundreds of nanometers. The oxygen content in the product powders was proportional to its specific surface area, and was reduced down to less than 1500 ppm when reacted at 1373 K for 72 h.

AB - Fine powders of titanium aluminides, the Ti–Al intermetallic compounds were directly synthesized via sodiothermic reduction of TiO2/Al2O3 composites in molten CaCl2. By using uniformly ball milled TiO2/Al2O3 composites, all types of titanium aluminides (Ti3Al, TiAl and TiAl3) were successfully synthesized in strictly single phase of the all product powders. Through this synthesis method, the composition of Ti–Al alloy powders is tunable in the entail range of the binary system, and the all composition is uniformed in the all particles. The average particle size of the product powders was in the range of some hundreds of nanometers. The oxygen content in the product powders was proportional to its specific surface area, and was reduced down to less than 1500 ppm when reacted at 1373 K for 72 h.

KW - Co-reduction

KW - Molten CaCl

KW - Oxygen content

KW - Ti–Al intermetallics

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Facile synthesis of fine Ti–Al intermetallic compound powders via sodiothermic reduction in molten CaCl₂

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Keywords

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