Microstructural and mechanical characterization of spark plasma sintered TiC ceramics with TiN additive. Issue 11 (1st August 2020)

• Record Type: Journal Article
• Authors: Pazhouhanfar, Yaghoub; Sabahi Namini, Abbas; Delbari, Seyed Ali; Nguyen, Thang Phan; Le, Quyet Van; Shaddel, Shahrzad; Pazhouhanfar, Morteza; Shokouhimehr, Mohammadreza; Shahedi Asl, Mehdi
• Is Part Of: Ceramics international. Volume 46:Issue 11(2020)Part B
• Page Start: 18924
• Page End: 18932
• Publication Date: 2020-08-01
• Subjects: TiC -- TiN -- Solid solution -- C3N4 -- SPS; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.04.215
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: This investigation intends to study the influence of titanium nitride (TiN) additive on the sintering behavior, mechanical features and microstructural development of TiC-based substances. For this objective, two different samples, namely monolithic TiC and TiC-5 wt% TiN, were sintered at 1900 °C using the SPS method. The specimens were held at the ultimate temperature for 10 min under 40 MPa. X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) were implemented to characterize the as-produced specimens. Introducing TiN increased the relative density of TiC by around 1.5%, standing next to 97%. The assessments revealed the creation of non-stoichiometric TiC1-x along with some graphitized carbon phases in the undoped ceramic. By contrast, TiN additive completely dissolved into the TiC matrix in the composite sample and a new in-situ phase (C3 N4 ) appeared. Finally, a Vickers hardness of ~2750 HV0.1 and a flexural strength of ~450 MPa were achieved for the TiN-doped specimen.