Formation, tribological and corrosion properties of thicker Ti-N layer produced by plasma nitriding of titanium in a N2-NH3 mixture gas

Shen, Hongyu; Wang, Liang

doi:10.1016/j.surfcoat.2020.125846

Cited by 24 publications

(12 citation statements)

References 34 publications

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“…The process of cathode glow discharge nitriding is well characterised in many studies and scientific publications [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. The diagram of the analysis of the ion nitriding device is shown in Figure 2 .…”

Section: Methodsmentioning

confidence: 99%

“…In other tests (with the process parameters: temp. 700 °C and 750 °C, times 2 and 4 h in NH 3 and N 2 + NH 3 gas mixture in ratio 2:1) showed that ion nitriding of industrially pure titanium at a temperature of 750 °C for 4 h significantly improved its wear resistance, lowered the friction coefficient and increased corrosion resistance due to the formation of a thicker Ti-N layer [ 12 ]. Kapczinski et al [ 13 ] showed that an improvement in tribological properties was obtained for the treated samples with the process duration of 3 h; in N 2 -H 2 plasma atmosphere; at nitriding temperatures of 600 and 800 °C.…”

Section: Introductionmentioning

confidence: 99%

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The Effectiveness of Active Screen Method in Ion Nitriding Grade 5 Titanium Alloy

et al. 2021

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The study assessed the effect of ion nitriding on the properties of the surface layer of Grade 5 titanium alloy used, among others, in medicine. Titanium and its alloys have low hardness and insufficient wear resistance in conditions of friction which limits the use of these materials. The improvement of these properties is only possible by the appropriate modification of the surface layer of these alloys. The ion nitriding process was carried out in a wide temperature range, i.e., 530–590 °C, and in the time range 5–17 h. Two variants of nitriding were applied: cathodic (conventional) nitriding and nitriding using the active screen method. The research results presented in this article allow for stating that each of the applied nitriding variants improves the analysed properties (nitrogen diffusion depth, hardness, wear resistance, microstructure analysis and surface topography) of the surface layers in relation to the material before nitriding. The hardness increased in every nitriding variant (the use of the additional active screen increased the hardness to 1021 HK0.025). The greatest increase in titanium abrasion resistance was found for surfaces after cathodic nitriding with an active screen. Each of the applied nitriding variants resulted in surface development.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Effectiveness of Active Screen Method in Ion Nitriding Grade 5 Titanium Alloy

et al. 2021

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“…Researchers have reported the effect of the ratio of N 2 and H 2 on the plasma nitriding of austenitic stainless steels [25][26][27][28][29]. The previous work demonstrated that mixture of nitrogen (N 2 ) and ammonia (NH 3 ) with proper ratio could enhance the rate of plasma nitriding [30].…”

Section: Introductionmentioning

confidence: 99%

Effect of nitriding temperature and its effects on the corrosion and wear resistance of 304 austenitic stainless steel

Peng,

Wang

2023

Surf. Topogr.: Metrol. Prop.

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Rapid plasma nitriding of AISI 304 austenitic stainless steel (304SS) was carried out at 440, 460 °C and 480 °C for 1 h in a mixture of NH3 and N2 with a ratio of 1:2. The phase composition, thickness of nitrided layer and properties of wear, and corrosion resistance were evaluated. After nitriding at 480 °C for 1 h, a 6.3 μm the thick nitrided layer was achieved. The influence of the nitriding process on the microstructure, morphology, hardness, corrosion, and wear resistance of the nitrided layers were also studied. Compared with unnitrided 304SS, the wear and corrosion resistances were substantially improved.

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“…Plasma nitriding favors the formation of hard and wear-resistant ceramic compound layers of titanium nitrides on titanium and its alloys, as well as a solid-solution sublayer of N-interstitial α-Ti crystals [ 18 ]. High-temperature nitriding with a long time of treatment can significantly improve the hardness and wear performance of titanium alloys [ 18 , 19 , 20 ] but can cause mechanical degradation, unpredictable deformation, and even β phase transformation leading to failure of the industrial components [ 21 ]. As a probable method to overcome these drawbacks, low-temperature plasma nitriding treatment below 700 °C has attracted the attention of many researchers [ 22 , 23 , 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Structure and Wear Performance of a Titanium Alloy by Using Low-Temperature Plasma Oxy-Nitriding

Li¹,

Wang

Wang³

et al. 2023

Materials

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To solve the problems of high nitriding temperature and long nitriding time with conventional plasma nitriding technologies, a kind of low-temperature plasma oxy-nitriding technology containing two-stage processes with different ratios of N to O was developed on a TC4 alloy in this paper. A thicker permeation coating can be obtained with this new technology compared to conventional plasma nitriding technology. The reason for this is that the oxygen introduction in the first two-hour oxy-nitriding step can break the continuous TiN layer, which facilitates the quick and deep diffusion of the solution-strengthening elements of O and N into the titanium alloy. Moreover, an inter-connected porous structure was formed under a compact compound layer, which acts as a buffer layer to absorb the external wear force. Therefore, the resultant coating showed the lowest COF values during the initial wear state, and almost no debris and cracks were detected after the wear test. For the treated samples with low hardness and no porous structure, fatigue cracks can easily form on the surface, and bulk peeling-offcan occur during the wear course.

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Formation, tribological and corrosion properties of thicker Ti-N layer produced by plasma nitriding of titanium in a N2-NH3 mixture gas

Cited by 24 publications

References 34 publications

The Effectiveness of Active Screen Method in Ion Nitriding Grade 5 Titanium Alloy

The Effectiveness of Active Screen Method in Ion Nitriding Grade 5 Titanium Alloy

Effect of nitriding temperature and its effects on the corrosion and wear resistance of 304 austenitic stainless steel

Structure and Wear Performance of a Titanium Alloy by Using Low-Temperature Plasma Oxy-Nitriding

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