Microstructure and Fracture Toughness of Compact TiC-Fe Gradient Coating Fabricated on Cast Iron Substrate by Two-Step In Situ Reaction

Bai, Haiqiang; Zhong, Lisheng; Shang, Zhao; Cui, Pengjie; Lee, Kang; Lv, Zhenlin; Xu, Yunhua

doi:10.1007/s11837-020-04047-1

Cited by 5 publications

(1 citation statement)

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“…Another diffusion-based method is to deposit Ti with CVD on carbon steel by keeping the substrate at a temperature that will allow the diffusion of carbon in the steel into the deposited Ti [8]. It is also possible to form a TiC layer in a two-step process that consists of depositing Ti with the PVD method and then realizing the diffusion process by heat treatment under vacuum [9]. In diffusion-based methods, treatment temperature ranging between 950 and 1250°C, time, and flux of titanium control the kinetics of the process.…”

Section: Introductionmentioning

confidence: 99%

Tic production on steel with cathodic arc based -diffusion process

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2022

Surface Engineering

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A coating-diffusion method based on cathodic arc physical deposition (CA-PVD) is introduced for the production of titanium carbide on steel substrates. The method allowed the production of TiC layer in a temperature range of 1000-1200°C in a controlled manner. The Fe-Ti compounds forming at the initial diffusion states are the source of iron in TiC. The free energy of formations indicated that Fe-Ti alloying at the interface takes place after depletion of C. The initially formed TiC layer does not grow in layer mode and kinetically hinders the reaction between carbon depleted zones in the steel. As the process proceeds, iron in the Fe-Ti compounds at the substrate diffusion layer interface is released with the carburization of titanium and carried towards the surface either by deposited fresh titanium layers or macroparticles. Macro particles played an essential role in collecting and carrying iron to the surface of the TiC layer.

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Section: Introductionmentioning

confidence: 99%