Effect of nitriding conditions of Ti6Al7Nb on microstructure of TiN surface layer
Authors:
- Krzysztof Szymkiewicz,
- Jerzy Morgiel,
- Łukasz Maj,
- Małgorzata Pomorska,
- Michał Tarnowski,
- Oleh Tkachuk,
- Iryna Pohrelyuk,
- Tadeusz Wierzchoń
Abstract
Presented experiments were aimed at comparing microstructure of the TiN layer produced on Ti6Al7Nb alloy being gas nitrided (GN) or glow discharge nitrided with either active screen (GD-ASN) or at cathode potential (GD-CPN). They were treated at 620 °C, 680 °C, 740 °C and 830 °C for 6 h. The transmission electron microscopy investigations showed that thickness of the TiN layer depends less on average temperature of nitrided piece, but more on temperature of its surface, being the highest for the GD-CPN process. The growth of TiN layer during the GN treatment proceeds mainly towards the core and to a lesser extent at the surface. The former process is controlled by chemisorption and inward diffusion of nitrogen atoms, while the latter by outward diffusion of titanium. The factor controlling the growth of TiN during the GD-ASN treatment is exclusively the flux of the titanium atoms sputtered from the active screen. The thickness of the TiN layer produced during the GD-CPN process in the temperature range between 680 °C and 830 °C is controlled in the same way as during the GN, except the fact that bombardment of the processed material with nitrogen ions strongly raises the surface temperature.
- Record ID
- CUT86adcd04757243f098154fc4af7003e2
- Publication categories
- ;
- Author
- Journal series
- Journal of Alloys and Compounds, ISSN 0925-8388, e-ISSN 1873-4669
- Issue year
- 2020
- Vol
- 845
- Pages
- [1-7]
- Article number
- 156320
- Other elements of collation
- fot.; schem.; wykr.; Bibliografia (na s.) - 7; Bibliografia (liczba pozycji) - 22; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 845
- Keywords in English
- titanium alloys, nitriding, TiN, microstructure, electron microscopy
- DOI
- DOI:10.1016/j.jallcom.2020.156320 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S0925838820326840 Opening in a new tab
- Related project
- Międzynarodowe interdyscyplinarne studia doktoranckie z zakresu nauk o materiałach z wykładowym językiem angielskim. . Project leader at PK: , ,
- Language
- eng (en) English
- Score (nominal)
- 0
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT86adcd04757243f098154fc4af7003e2/
- URN
urn:pkr-prod:CUT86adcd04757243f098154fc4af7003e2
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