In-situ synthesis of TiN and TiB2 compounds during reactive spark plasma sintering of BN–Ti composites

Maryam Abdolahpour Salari; Günay Merhan Muğlu; Mohsen Rezaei; M. Saravana Kumar; Harikrishnan Pulikkalparambil; Suchart  Siengchin

doi:10.53063/synsint.2021.119

Maryam Abdolahpour Salari ¹
Günay Merhan Muğlu ²
Mohsen Rezaei ³
M. Saravana Kumar ⁴
Harikrishnan Pulikkalparambil ⁵
Suchart Siengchin ⁵

¹ Department of Physics, Faculty of Sciences, Ataturk University, Erzurum, Turkey
² Hınıs Vocational College, Department of Medical Services and Techniques, Ataturk University, Erzurum, Turkey
³ Department of Chemistry, Faculty of Sciences, Ataturk University, Erzurum, Turkey
⁴ Department of Mechanical Engineering, Mount Zion College of Engineering and Technology, Pudukkottai, Tamil Nadu, India
⁵ Department of Materials and Production Engineering, The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut’s University of Technology North Bangkok, Bangkok, 10800, Thailand

https://doi.org/10.53063/synsint.2021.119

Abstract

A BN-TiB₂-TiN composite was produced via reactive sintering of the hexagonal BN (hBN) with 20 wt% Ti. Spark plasma sintering (SPS) was used as the fabrication method and the sample was characterized by X-ray diffractometry, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. According to the results, the Ti was utterly consumed during the SPS, led to the in-situ TiB₂ and TiN_0.9formations. Additionally, the microstructural study revealed the nucleation and growth of new hBN platelets from the initial fine hBN particles. Anyway, the final composite reached a relative density of 95%, because of the remaining free spaces between the hBN platelets. It was found that some nitrogen and boron atoms could leave the TiN and TiB₂ microstructures, respectively, and diffuse into the opposing phase.

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Keywords: Boron nitride, Titanium, Reactive spark plasma sintering, In-situ phases, Synthesis

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