Highly textured TiN ceramic prepared by edge-free spark plasma sintering

Abstract

Highly textured TiN ceramic was successfully prepared by edge-free spark plasma sintering (EFSPS) method at 1600°C using anisotropic Ti₂AlN cylinder as preform. The phase and crystalline evolutions from anisotropic Ti₂AlN to textured bulk TiN were revealed via changing the EFSPS temperature. The orientation degree of the as-fabricated TiN ceramic was evaluated by X-ray diffraction and electron backscattered diffraction. It was found that the lll planes of TiN grains were perpendicular to the SPS-loading direction and the Lotgering orientation factor on the top surface of bulk TiN was as high as f_(lll)= 0.88. Because of the highly textured microstructure, the obtained TiN ceramic exhibited anisotropic mechanical and physical properties.

KEYWORDS:

• Nitrides
• spark plasma sintering
• electron backscattering diffraction (EBSD)
• X-ray diffraction (XRD)
• textured microstructure
• orientation factor
• mechanical properties
• physical properties

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (grant numbers 51872222, 51602184) and State Key Laboratory of Mechanical Transmission for Mechanical Behavior of Materials (grant number 20151714).