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Advances in Surface Engineering III: Poster Session
Sponsored by: TMS Materials Processing and Manufacturing Division, TMS: Surface Engineering Committee
Program Organizers: Tushar Borkar, Cleveland State University; Arif Mubarok, PPG; Rajeev Gupta, North Carolina State University; Sandip Harimkar, Oklahoma State University; Bharat Jasthi, South Dakota School of Mines & Technology

Wednesday 5:30 PM
March 17, 2021
Room: RM 37
Location: TMS2021 Virtual

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Damage Tolerance of TiC-laden Tribaloy T400 Suspension-powder Plasma-sprayed Composite Biocompatible Coating: Moumita Mistri¹; Shrikant Joshi²; Kantesh Balani¹; Kamal Kar¹; ¹Indian Institute of Technology Kanpur; ²University West
    TiC-reinforced Tribaloy T400 suspension-powder plasma-sprayed coating is deposited. A uniform and adherent T400-TiC coating of thickness ~100 µm revealed in microstructural analysis further confirms dendritic Laves CoMoSi/Co₃Mo₂Si and hard intermetallic Co₇Mo₆/Co₂Mo₇ phases of T400, along with the corresponding TiC phases, in phase study. Synergistic reinforcement of TiC has elicited an enhancement in elastic modulus (of ~184.5 GPa) by ~36%, and Vickers hardness (of ~11.5 GPa) by ~82% in comparison to that of T400 (~135.2 GPa, and ~6.3 GPa respectively. A subsequent deceased fretting wear contact diameter, hence an improved damage tolerance, in T400-TiC compared to T400 alone is noted from a contact area-based wear model postulated herein. Further, with synergistic cell viability in L929 fibroblast, TiC reinforcement in T400 is ascertained to accommodate heavy-duty in-situ load-bearing application with substantially improved micro-hardness via retaining the smaller grain size, and a subsequent fretting wear augmentation through carbide phase strengthening.

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