Microstructure and physical properties of iron carbide films formed by plasma enhanced chemical vapor deposition

Siriwardane, Harshini P.; Pringle, Oran Allan; Newkirk, Joseph William; James, William Joseph

doi:10.1016/s0040-6090(96)08555-0

Cited by 12 publications

(5 citation statements)

References 6 publications

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“…This mechanism is known as metal dusting, which may result in deterioration of the layer formed and may compromise the mechanical properties of the treated material . However, metal dusting seems very unlikely to have occurred in this research because this film does not have the same interface with the Fe 3 C phase, as seen in the microstructures in 16,24,25 .…”

Section: Resultsmentioning

confidence: 86%

“…This graphite film can also occur due a supersaturation of cementite, thus causing graphite phase precipitation 16,24,25 . This mechanism is known as metal dusting, which may result in deterioration of the layer formed and may compromise the mechanical properties of the treated material .…”

Section: Resultsmentioning

confidence: 99%

“…This technique was also found to be an efficient technique in the hardening process of austenitic 12,13 and martensitic 14,15 stainless steel due to the sensitization phenomenon above 450 °C in these materials. Furthermore, there are some studies in the literature, which use plasma carburizing at low temperature as a useful method to produce surface layers of pure cementite [16][17][18][19] .…”

Section: Introductionmentioning

confidence: 99%

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Plasma Carburizing of Sintered Pure Iron at Low Temperature

et al. 2015

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In this work, plasma carburizing of sintered pure iron at low temperature was investigated. Samples were carburized under a dc abnormal glow discharge in two mixed atmospheres (5%CH 4 + 95%H 2 and 20%CH 4 + 80%H 2 ) at 500 °C and 700 °C for 3 and 6 hours. The influence of these parameters was investigated by Scan Electron Microscopy (SEM), X-ray Diffraction (DRX), Raman spectroscopy and microhardness measurements. There is a correlation between temperature and layer morphology, and a layer of polycrystalline cementite was obtained at 500 °C and 700 °C on a ferrite substrate. Furthermore, the carburized layer thickness increased with an increase in the treatment time and the methane percentage. The topography is very dependent on the treatment temperature.

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Section: Resultsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Plasma Carburizing of Sintered Pure Iron at Low Temperature

et al. 2015

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“…Carburizing treatments at low temperatures has been developed, as described in [10][11][12][13] , for stainless steels to avoid sensitization above 450 °C in these materials, and also for sintered pure iron and automobile gears, again, both to ensure dimensional control 9,14 . Furthermore, the literature contains some studies describing plasma carburizing at low temperatures as a method to produce surface layers of pure cementite [15][16][17][18] . This work evaluates the layers obtained in AISI 1005 steel for different plasma surface treatments with regards to the structure, microstructure and hardness of the formed layers.…”

Section: Introductionmentioning

confidence: 99%

AISI 1005 Steel Plasma Treated by Different Thermochemical Surface Treatments

et al. 2016

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To modify the surface structure of AISI 1005 steel and its properties without any dimensional loss, different plasma surface treatments were performed at low temperatures (500 °C) in this study. The samples were subjected to single plasma treatments including: nitriding (N5% and N3%), carburizing (CE) and ferritic nitrocarburizing (NC) and to duplex treatments of nitriding followed by carburizing (N5%+CE and N3%+CE) and ferritic nitrocarburizing followed by carburizing (NC+CE). The gas mixture used for these treatments was varied as follows: nitriding (5%N 2 +95%H 2 and 3%N 2 +97%H 2 ), carburizing (5%CH 4 +95%H 2 ) and ferritic nitrocarburizing (5%N 2 +1.5%CH 4 +93.5%H 2 ). A microstructural characterization of the samples was carried out using optical and scanning electron microscopy in addition to XRD analysis. Microhardness testing was also performed. The XRD analysis showed a stabilization of the outermost cementite layer for all of the carburizing treatments. The results show that a greater hardness increase was achieved for the nitriding treatment as well as a more regular compound layer. However, a greater depth of hardening was obtained in samples with NC+CE and N5%+CE, which extended to the hardened depth to 800 μm.

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“…The iron carbides obtained as a product of iron carburisation are interesting materials, which can be used, for example, as sensors, magnets, alternative raw materials for the production of steel [1,2], for the denitrification of liquid steel [3] or as catalysts [4]. Fine or coarse grain iron carbide can be obtained by carburisation of iron oxides with carbon monoxide [5,6]; sonochemical decomposition of Fe(CO) 5 [7]; mechanosynthesis of elemental Fe and graphite powders [8]; plasma enhanced chemical vapour deposition [9]; or reaction of hydrocarbons with iron [10][11][12][13][14][15]. The nanocrystalline iron carbide was prepared by a reaction with of methane with nanocrystalline iron at a relatively low temperatures (below 600 °C).…”

Section: Introductionmentioning

confidence: 99%

Preparation of Nanocrystalline Iron Carbide by Reaction of Iron with Methane

Arabczyk

Konicki

Narkiewicz

2003

SSP

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The process of the formation of nanocrystalline iron carbide in the reaction of nanocrystalline iron with pure methane, or CH 4 /H 2 (2 :1) gas mixture under atmospheric pressure, at 580 O C has been studied. The carburisation process has been controlled by a thermobalance. The rate of the carburisation process depended on the chemical composition of the iron surface and on the process conditions. As a result of the process, iron carbide is obtained together with unconverted a-iron or a carbon deposit. The optimal conditions to produce iron carbide only can be reached when the reaction rate is lowered, by the dilution of methane with hydrogen, or by a modification of the surface of the nanocrystalline iron. The samples before and after the carburisation process have been characterised by XRD. The average size of the iron carbide crystallites produced was 35 nm.

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Microstructure and physical properties of iron carbide films formed by plasma enhanced chemical vapor deposition

Cited by 12 publications

References 6 publications

Plasma Carburizing of Sintered Pure Iron at Low Temperature

Plasma Carburizing of Sintered Pure Iron at Low Temperature

AISI 1005 Steel Plasma Treated by Different Thermochemical Surface Treatments

Preparation of Nanocrystalline Iron Carbide by Reaction of Iron with Methane

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