Influence of Thermochemical Treatment on the Surface Topography of Titanium

Issues » Volume 39, Issue 9

I. M. Pohrelyuk$^{1}$, S. M. Lavrys$^{1}$, I. V. Stasyshyn$^{1}$, O. V. Penkovyi$^{2}$

$^{1}$Karpenko Physico-Mechanical Institute, NAS of Ukraine, 5, Naukova Str., 79060 Lviv, Ukraine
$^{2}$Lviv Polytechnic National University, 12 Bandera Str., 79013 Lviv, Ukraine

Received: 13.03.2017. Download: PDF

Influence of the thermochemical treatment (nitriding and boriding) on the surface topography of the Grade 2 commercially pure titanium is analysed. As established, the single-phase nitride (Ti$_2$N) or boride (TiB) films are formed on the surface during thermodiffusive saturation with nitrogen or boron at the temperature of 750°C. With increasing saturation temperature to 900°C, the formed surface film becomes a two-phase (TiN + Ti$_2$N or TiB$_2$ + TiB) one. As found, a surface roughness of the Grade 2 titanium increases, regardless of thermochemical treatment (nitriding, boriding). However, the combination of the height, spacing and additional (skewness, kurtosis) roughness parameters of a titanium surface favourably singles out boriding compared with nitriding.

Key words: titanium, nitriding, boriding, phase-structural state, microhardness, surface topography, roughness.

URL: http://mfint.imp.kiev.ua/en/abstract/v39/i09/1183.html

DOI: https://doi.org/10.15407/mfint.39.09.1183

PACS: 62.20.Qp, 68.35.Ct, 68.35.Dv, 68.35.Fx, 68.35.Gy, 68.37.Hk, 68.55.J-, 81.65.Lp

Citation: I. M. Pohrelyuk, S. M. Lavrys, I. V. Stasyshyn, and O. V. Penkovyi, Influence of Thermochemical Treatment on the Surface Topography of Titanium, Metallofiz. Noveishie Tekhnol., 39, No. 9: 1183—1196 (2017) (in Ukrainian)

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