Rominiyi, ALShongwe, MBTshabalala, Lerato COgunmuyiwa, ENJeje, SOBabalola, BJOlubambi, PA2020-10-122020-10-122020-12Rominiyi, A.L., Shongwe, M.B., Tshabalala, L.C., et al. 2020. Spark plasma sintering of Ti-Ni-TiCN composites: Microstructural characterization, densification and mechanical properties. Journal of Alloys and Compounds, vol, 848, pp. 1-100925-83881873-4669doi.org/10.1016/j.jallcom.2020.156559https://www.sciencedirect.com/science/article/pii/S0925838820329236http://hdl.handle.net/10204/11628Copyright: 2020, Elsevier. Due to copyright restrictions, the attached PDF file contains the abstract of the full-text item. For access to the full-text item, please consult the publisher's website.Ti–Ni–TiCN composites with varying TiCN contents (5, 10 and 15 wt%) were consolidated using the novel spark plasma sintering technique at a sintering temperature of 1100 °C, for 10 min holding time under a vacuum condition of lower than 4 Pa, 100 °C/min heating rate and applied pressure of 50 MPa. The effects of Ni additive and TiCN nanoceramic reinforcement content on densification, microstructure and mechanical properties of the developed composites were investigated. Scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscope (EDS) and X-ray diffraction (XRD) techniques were employed to study the morphology and phases present in the developed composites. SEM results revealed the presence of undissolved particles and lamella arrangements of phases within the matrix of the sintered composites which were confirmed by the EDS and XRD results as undissolved TiCN particles, in-situ formed TiN and Ti(sub2)Ni intermetallic phases. The relative density of the sintered compacts decreased from 99.3% to 98.23% with increase in the reinforcement content. The hardness of the sintered composites was found to increase with increasing reinforcement content. Compressive test results indicated that Ti–Ni–TiCN composites displayed improved compressive strength than the pure Ti samples. The optimum properties were obtained in Ti–6Ni–10TiCN composite with Vickers hardness of 398 HV(sub1.0), compressive yield and ultimate strengths of about 998 MPa and 1156 MPa respectively.enCompressive strengthsIn-situ TiNMetal matrix compositesSpark plasma sinteringTiCN nanoceramicsArticleRominiyi, A., Shongwe, M., Tshabalala, L. C., Ogunmuyiwa, E., Jeje, S., Babalola, B., & Olubambi, P. (2020). Spark plasma sintering of Ti-Ni-TiCN composites: Microstructural characterization, densification and mechanical properties. http://hdl.handle.net/10204/11628Rominiyi, AL, MB Shongwe, Lerato C Tshabalala, EN Ogunmuyiwa, SO Jeje, BJ Babalola, and PA Olubambi "Spark plasma sintering of Ti-Ni-TiCN composites: Microstructural characterization, densification and mechanical properties." (2020) http://hdl.handle.net/10204/11628Rominiyi A, Shongwe M, Tshabalala LC, Ogunmuyiwa E, Jeje S, Babalola B, et al. Spark plasma sintering of Ti-Ni-TiCN composites: Microstructural characterization, densification and mechanical properties. 2020; http://hdl.handle.net/10204/11628.TY - Article AU - Rominiyi, AL AU - Shongwe, MB AU - Tshabalala, Lerato C AU - Ogunmuyiwa, EN AU - Jeje, SO AU - Babalola, BJ AU - Olubambi, PA AB - Ti–Ni–TiCN composites with varying TiCN contents (5, 10 and 15 wt%) were consolidated using the novel spark plasma sintering technique at a sintering temperature of 1100 °C, for 10 min holding time under a vacuum condition of lower than 4 Pa, 100 °C/min heating rate and applied pressure of 50 MPa. The effects of Ni additive and TiCN nanoceramic reinforcement content on densification, microstructure and mechanical properties of the developed composites were investigated. Scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscope (EDS) and X-ray diffraction (XRD) techniques were employed to study the morphology and phases present in the developed composites. SEM results revealed the presence of undissolved particles and lamella arrangements of phases within the matrix of the sintered composites which were confirmed by the EDS and XRD results as undissolved TiCN particles, in-situ formed TiN and Ti(sub2)Ni intermetallic phases. The relative density of the sintered compacts decreased from 99.3% to 98.23% with increase in the reinforcement content. The hardness of the sintered composites was found to increase with increasing reinforcement content. Compressive test results indicated that Ti–Ni–TiCN composites displayed improved compressive strength than the pure Ti samples. The optimum properties were obtained in Ti–6Ni–10TiCN composite with Vickers hardness of 398 HV(sub1.0), compressive yield and ultimate strengths of about 998 MPa and 1156 MPa respectively. DA - 2020-12 DB - ResearchSpace DP - CSIR KW - Compressive strengths KW - In-situ TiN KW - Metal matrix composites KW - Spark plasma sintering KW - TiCN nanoceramics LK - https://researchspace.csir.co.za PY - 2020 SM - 0925-8388 SM - 1873-4669 T1 - Spark plasma sintering of Ti-Ni-TiCN composites: Microstructural characterization, densification and mechanical properties TI - Spark plasma sintering of Ti-Ni-TiCN composites: Microstructural characterization, densification and mechanical properties UR - http://hdl.handle.net/10204/11628 ER -