Spark plasma sinterability of TiC ceramics with different nitride additives

Abbas Sabahi Namini*, Seyed Ali Delbari, Nilgun Baydogan, Mohammad Vajdi, Farhad Sadegh Moghanlou, Mehdi Shahedi Asl

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

This research aimed to assess the effect of various nitride additives, i.e., AlN, hexagonal BN, Si3N4, TiN, and ZrN, on the sinterability, microstructure, and mechanical-physical characteristics of TiC-based materials. All ceramics were sintered at the same sintering conditions using the spark plasma sintering (SPS) process. A relative density over 100% was secured by introducing 5 wt% AlN to the TiC matrix. By contrast, the Si3N4 additive had the most detrimental influence on the sinterability of TiC, resulting in a relative density of around 90.4%. Both ZrN and Si3N4 additives were fully consumed over the SPS route, contributing to the in-situ formation of (ZrC + TiN), and SiC ingredients, respectively. Additionally, the finest microstructure was obtained by using BN as an additive. The best flexural strength (688 MPa) was secured for the TiC-AlN sample, while the lowest (219 MPa) was related to the TiC-Si3N4 composite. Considering the hardness values, the highest number (3128 HV0.1 kg) was associated with the monolithic sample, followed by the TiC-AlN ceramic, at 3050 HV0.1 kg, while the lowest hardness of 2649 HV0.1 kg was attained for the TiC-ZrN composite. Ultimately, both BN and AlN additives enhanced the thermal conductivity of TiC, reaching values of 18.6 and 21.9 W/mK, respectively.

Original languageEnglish
Pages (from-to)363-370
Number of pages8
JournalJournal of the Taiwan Institute of Chemical Engineers
Volume123
DOIs
Publication statusPublished - Jun 2021

Bibliographical note

Publisher Copyright:
© 2021 Taiwan Institute of Chemical Engineers

Funding

This research work was financially supported by Synsint Research Group (Grant No. SS-2021–004).

FundersFunder number
Synsint Research GroupSS-2021–004

    Keywords

    • Additive
    • Characterization
    • Nitrides
    • Spark plasma sintering
    • Titanium carbide

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