2005
DOI: 10.1007/s11085-005-4385-2
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Cyclic-Oxidation Resistance of Protective Silicide Layers on Titanium

Abstract: Titanium was powder siliconized and gas nitrided, in order to improve its cyclic-oxidation resistance. Siliconizing was performed in a pure-silicon powder at temperatures in the range of 800-1100 • C for 3-48 h. Gas nitriding was carried out in pure N 2 at 1100 • C/12 h. Cyclic-oxidation experiments with the siliconized and nitrided samples were conducted in air at 850 and 950 • C for up to 560 h. It was found that the siliconized layers grew according to the parabolic law with the activation energy for silico… Show more

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Cited by 16 publications
(20 citation statements)
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“…On the other hand, titanium exhibits an allotropic transition between a low temperature hcp α-Ti and a high temperature bcc β-Ti at 882°C. According to Vojt ch et al [8], a 20 µm-thick TiN layer and a 50 µm-thick α-Ti(N) layer were obtained when pure titanium was gas-nitrided at 1100°C for 12 h in atmospheric nitrogen. Their nitriding temperature was well above the β-transus of pure titanium (882°C).…”
mentioning
confidence: 99%
“…On the other hand, titanium exhibits an allotropic transition between a low temperature hcp α-Ti and a high temperature bcc β-Ti at 882°C. According to Vojt ch et al [8], a 20 µm-thick TiN layer and a 50 µm-thick α-Ti(N) layer were obtained when pure titanium was gas-nitrided at 1100°C for 12 h in atmospheric nitrogen. Their nitriding temperature was well above the β-transus of pure titanium (882°C).…”
mentioning
confidence: 99%
“…1. It was shown in our previous work [5] that the protective effect of the powder siliconized layers is much better as compared to commonly used nitrided layers. A protective effect of the layer prepared by the liquid phase alloying is illustrated in Fig.…”
Section: Oxidation Resistancementioning
confidence: 82%
“…It was shown [5] that the protective effect of the siliconized layers is due to an incorporation of silicon into the scales which are formed during oxidation. Silicon is known to reduce the transport rate of oxygen in rutile and the porosity of scales.…”
Section: Oxidation Resistancementioning
confidence: 99%
“…The papers [67][68][69][70][71] show that siliconizing of titanium greatly improves its resistance to isothermal and cyclic oxidation since a Ti 5 Si 3 layer forms on the surface. The oxidation kinetics of the silicide coating is parabolic.…”
Section: High-temperature Oxidation Of Silicidesmentioning
confidence: 99%