Duplex Mechanism of TiC Formation and Ti Dissolution Behavior in KCl-LiCl Molten Salt

Nadimi, Hamed; Sarpoolaky, Hossein; Soltanieh, Mansour

doi:10.22068/ijmse.3322

Volume 20, Issue 4 (December 2023) IJMSE 2023, 20(4): 1-8 | Back to browse issues page

‎ 10.22068/ijmse.3322

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Nadimi H, Sarpoolaky H, Soltanieh M. Duplex Mechanism of TiC Formation and Ti Dissolution Behavior in KCl-LiCl Molten Salt. IJMSE 2023; 20 (4) :1-8
URL: http://ijmse.iust.ac.ir/article-1-3322-en.html

Duplex Mechanism of TiC Formation and Ti Dissolution Behavior in KCl-LiCl Molten Salt

Hamed Nadimi

, Hossein Sarpoolaky

, Mansour Soltanieh

Abstract: (5782 Views)

In the present investigation, an attempt was made to evaluate the dissolution behavior of Ti in molten KCl-LiCl. The X-ray diffraction (XRD) pattern of heated Ti plate at 800 ^oC for 4 h without carbon black in molten salt revealed that TiCl₃ formation was feasible. For more assurance, Ti plate was heated at 950 ^oC for 4 h in the presence of carbon black to identify synthesized TiC. Transmission electron microscope (TEM) and scanning electron microscope (SEM) images from precursors and the final product showed that nano-crystalline TiC formation from coarse Ti particles was almost impossible without Ti dissolution. Thermodynamics calculations using Factsage software proved that it was possible to form various TiCl_x compounds. The TiC formation mechanism can be discussed in two possible ways: a reaction between Ti ion and carbon black for synthesizing TiC (direct) and a reaction between TiCl₄ and carbon black led to indirect TiC synthesis. Elemental mapping using energy dispersive X-ray spectroscope (EDS) indicated that up to 815 ^oC, chlorine existed in the map.