Surface modification of constructional steels by irradiation with high intensity pulsed nitrogen plasma beams

Langner, J.; Piekoşzewski, J.; Werner, Z.; Tereshin, V.I.; Chebotarev, V. V.; Garkusha, I.E.; Waliś, L.; Sartowska, B.; Starosta, Wojciech; Szymczyk, W; Kopcewicz, M.; Grabias, A.

doi:10.1016/s0257-8972(00)00616-2

Cited by 24 publications

(17 citation statements)

References 7 publications

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“…Yapıda görülen FeN,Fe2-3N, W3O, -Fe fazları malzeme yüzey özellikleri etkileyen önemli fazlardır. Özellikle nitrür esaslı fazlar, wolfram ve wolframoksit bileşikleri sertlik ve aşınma dayanımlarının artmasında etkili fazlardır [6,9,10]. Tyurin ve arkadaşları da yaptıkları çalışmalarda aynı fazların varlıklarını tespit etmişlerdir [4].…”

Section: Procedure)unclassified

Pulse plazma yöntemi modifiye edilmiş sıcak iş takım çeliklerinin yüzey özellikleri

Özbek¹

2017

SAÜ Fen Bilimleri Enstitüsü Dergisi

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ÖZPulse plazma prosesi bir modifikasyon yöntemidir. Bu çalışmada; sıcak iş takım olan W360 ISOBLOC çeliğinin yüzeyleri pulse plazma sistemi ile modifiye edilmiş ve bu yüzeylerin mekaniksel ve mikroyapısal özellikleri araştırılmıştır. Deneysel çalışmalarda üç farklı nozul mesafesi (30mm, 40mm, 50mm) ve pulse sayısı (15, 10, 5) kullanılmıştır. Modifiye edilen numunelerin optik mikroyapı fotoğrafları çekilmiş ve modifikasyon tabaka kalınlıkları ölçülmüştür. Pulse plazma prosesinin uygulandığı parametrelerin değişiminin modifikasyon tabaka kalınlığını ve yapısını etkilediği belirlenmiştir. Modifikasyon tabakasından alınan x-ışını analizlerinde FeN, Fe2N, -Fe piklerine rastlanmıştır. Çelik yüzeylerine SEM ve EDS analizleri uygulanmıştır. Mikrosertlik ölçümlerinde mesafeye ve pulse plazma parametrelerine göre değişen sertlik değerleri elde edilmiştir. Modifikasyon işlemi uygulanmadan çeliğin sertlik değeri 4-6 kat artmıştır.Anahtar Kelimeler: Pulse plazma, Sıcak iş takım çeliği, Modifikasyon, SertlikThe surface properties of hot work steel modificated with pulse plasma treatment ABSTRACTIn this study, the surface properties of a W360 ISOBLOC as hot work steel was investigated in respect to mechanical and microstructural aspects. Three were three different sample-plasma gun nozzle distances (30, 40 and 50 mm) and three different pulse number (5,10 and 15) were chosen for the surface modification at a constant battery capacity of 800 mf. After pulse plasma surface treatment, the modified surface layers were examined using an optical microscope. The SEM and EDS analyses were applied to surface on samples. It was observed that surface treatment affects the formation of a new structure. XRD analyses was done. The new phases were formed such as FeN, Fe2N, -Fe, W3O which is located in the modification layer. The samples were also subjected to micro-hardness measurements. It was found that the hardness values of modified surfaces are 4-6 times higher than that of the untreated samples.

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Section: Procedure)unclassified

Pulse plazma yöntemi modifiye edilmiş sıcak iş takım çeliklerinin yüzey özellikleri

Özbek¹

2017

SAÜ Fen Bilimleri Enstitüsü Dergisi

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“…Both electrodes were about 20 cm in length, and each of them consisted of 32 thin molybdenum (Mo) rods distributed symmetrically around the electrode peripheries [7,8]. The facility was equipped with a fast-acting gas valve used to inject some amount of the working gas, and the main discharge could be powered from a condenser bank charged to 30-35 kV.…”

Section: Experimental Set-upmentioning

confidence: 99%

“…Studies of the behaviour of this material were performed, e.g., using pulsed plasma streams generated within plasma-focus (PF) facilities [2], but such streams contained many impurities from metal electrodes. Therefore, it was reasonable to use plasma streams emitted from a so-called Rod Plasma Injector (RPI), which (due to self-screening of the rod electrodes by their own magnetic fi elds) can produce plasma containing smaller amounts of impurities [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…In order to obtain new information about behaviour of CFC samples irradiated by relatively clean deuterium plasma, it was decided to use the RPI-IBIS facility [7,8] operated at the NCBJ in Otwock-Swierk, Poland. The main aim of the Research on interactions of plasma streams with CFC targets in the Rod Plasma Injector facility reported study was to investigate optical emission spectra -fi rst from plasma propagating freely in the RPI-IBIS vacuum chamber (in order to determine the optimal operational mode of this machine), and next to investigate spectra from plasma interacting with a CFC target.…”

Section: Introductionmentioning

confidence: 99%

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Research on interactions of plasma streams with CFC targets in the Rod Plasma Injector facility

et al. 2016

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Abstract. This paper present results of optical spectroscopy studies of interactions of intense plasma streams with a solid target made of carbon fi bre composite (CFC). The experiments were carried out within the Rod Plasma Injector (RPI) IBIS facility. The optical measurements were performed fi rst for a freely propagating plasma stream in order to determine the optimal operational parameters of this facility. Optical emission spectra (OES) were recorded for different operational modes of the RPI IBIS device, and spectral lines were identifi ed originating from the working gas (deuterium) as well as some lines from the electrode material (molybdenum). Subsequently, optical measurements of plasma interacting with the CFC target were performed. In the optical spectra recorded with the irradiated CFC samples, in addition to deuterium and molybdenum lines, many carbon lines, which enabled to estimate erosion of the investigated targets, were recorded. In order to study changes in the irradiated CFC samples, their surfaces were analysed (before and after several plasma discharges) by means of scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) techniques. The analysis of the obtained SEM images showed that the plasma irradiation induces noticeable changes in the surface morphology, for example vaporisation of some carbon fi bres and formation of microcracks. The obtained EDS images showed that upon the irradiated target surface, some impurity ions are also deposited, particularly molybdenum ions from the applied electrodes.

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“…Surface interaction of pulsed high-power sources such as laser [6,7], ion [8,9], and electron [10,11] beams, low pressure arc discharges and plasma flows [12][13][14] has been intensively studied up to now. The ion or plasma pulses can transport some material species to the target that may play an important role in the modification of a given target material.…”

Section: Introductionmentioning

confidence: 99%

Effect of Compressed Plasma Flow on Tantalum-Titanium Thin Layer Deposited on Silicon Substrate

Sari¹

2014

IJMSA

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Abstract:The interaction of a dense compressed nitrogen plasma flow with a system of Ta-Ti layers on a silicon substrate has been investigated. This plasma flow was generated in a quasi-stationary pulsed plasma accelerator that can provide a supersonic high energy plasma flux. The plasma pulse duration, discharge current, concentration, and energy densities absorbed by the target were 100 µs, 80 kA, 10 18 cm −3 , and 3-13 J/cm 2 respectively. The samples were exposed to a single plasma pulseor to a series of pulses and were characterized by scanning electron microscopy, X-ray diffraction, and energy dispersive X-ray analyses. The result showed that the changes in the elemental and structure phase compositions depends on energy and number of plasma pulses. Formation of Ti 5 Si 3 and Ta 2 N, are the main results of the current research.

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Surface modification of constructional steels by irradiation with high intensity pulsed nitrogen plasma beams

Cited by 24 publications

References 7 publications

Pulse plazma yöntemi modifiye edilmiş sıcak iş takım çeliklerinin yüzey özellikleri

Pulse plazma yöntemi modifiye edilmiş sıcak iş takım çeliklerinin yüzey özellikleri

Research on interactions of plasma streams with CFC targets in the Rod Plasma Injector facility

Effect of Compressed Plasma Flow on Tantalum-Titanium Thin Layer Deposited on Silicon Substrate

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