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Molten Salt Electrochemical Synthesis of Ternary Carbide Ti 3 AlC 2 from Titanium‐Rich Slag
Author(s) -
Pang Zhongya,
Zou Xingli,
Li Shangshu,
Tang Wei,
Xu Qian,
Lu Xionggang
Publication year - 2020
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201901300
Subject(s) - materials science , molten salt , titanium , electrolysis , metallurgy , slag (welding) , electrochemistry , metal , chemical engineering , carbide , titanium carbide , phase (matter) , electrode , chemistry , electrolyte , engineering , organic chemistry
Ti 3 AlC 2 is electrochemically synthesized from titanium‐rich slag/Al 2 O 3 /C mixtures in molten salts. The intermediate products are systematically analyzed to investigate the formation process of Ti 3 AlC 2 . The results show that the synthesis process typically involves an electrodeoxidation process and in situ carburization/combination process. In addition, most of the undesired metallic oxides contained in the titanium‐rich slag are removed effectively during the electrolysis process, and the removal mechanism of these undesired metallic oxides is further discussed. The influences of different molten salts (including molten CaCl 2 and CaCl 2 –NaCl) and temperatures (range of 800–1000 °C) on the final products are also studied. The results show that these electrosynthesis conditions influence the morphology and phase composition of the products. The synthesized Ti 3 AlC 2 particles possess an irregular plate‐like morphology. It is suggested that the molten salt electrochemical synthesis technology is a promising process to produce Ti 3 AlC 2 and/or other MAX phases from multicomponent complex ores.