HARDNESS AND ELASTIC MODULUS OF TITANIUM NITRIDE COATINGS PREPARED BY PIRAC METHOD

Siyuan Wu, Shoujun Wu, Guoyun Zhang and Weiguo Zhang
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Siyuan Wu: College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling Shaanxi 712100, P. R. China
Shoujun Wu: College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling Shaanxi 712100, P. R. China
Guoyun Zhang: #x2020;State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling Shaanxi 712100, P. R. China
Weiguo Zhang: #x2021;College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling Shaanxi 712100, P. R. China

Surface Review and Letters (SRL), 2018, vol. 25, issue 01, 1-8

Abstract: In the present work, hardness and elastic modulus of a titanium nitride coatings prepared on Ti6Al4V by powder immersion reaction-assisted coating (PIRAC) are tested and comparatively studied with a physical vapor deposition (PVD) TiN coating. Surface hardness of the PIRAC coatings is about 11GPa, much lower than that of PVD coating of 22GPa. The hardness distribution profile from surface to substrate of the PVD coatings is steeply decreased from ∼22GPa to ∼4.5GPa of the Ti6Al4V substrate. The PIRAC coatings show a gradually decreasing hardness distribution profile. Elastic modulus of the PVD coating is about 426GPa. The PIRAC coatings show adjustable elastic modulus. Elastic modulus of the PIRAC coatings prepared at 750∘C for 24h and that at 800∘C for 8h is about 234 and 293GPa, respectively.

Keywords: Titanium nitride; coating; PIRAC method; elastic modulus; hardness (search for similar items in EconPapers)
Date: 2018
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DOI: 10.1142/S0218625X18500403

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