PLASMA NITRIDING THESIS

PLASMA NITRIDING THESIS

Effect of pulse repetition time on surface properties of pulsed plasma nitrided AISI steel. Decreasing chromium precipitation in AISI stainless steel during the plasma-nitriding process. This concept of plasma generation and control was put into practice. Metallurgical response of an AISI steel to different plasma nitriding gas mixtures. Hardness distribution at the vicinity of the inner surface of the through-hole in the micro-nozzle outlet. Effects of various gas mixtures on plasma nitriding behavior of AISI steel. As suggested in [ 18 ], the flow rate ratio of H 2 to N 2 in the mixture gas also affected the NH-radical yields in the generated plasmas.

The structural and mechanical properties especially the fatigue behaviour of the raw, quenched and plasma nitrided AISI steel were examined. The effects of plasma nitriding process parameters on the wear characteristics of AISI M2 tool steel. Materials Characterization, 61 10 , Surface and Coatings Technology, , SS Don’t have an account? Characterisation of nitrogen-bearing surface layers on Nibase superalloys. Advanced Science Letters, 22 11 ,

These nozzle outlets contact and hit the joined surfaces; the stainless steel nozzles often deform and become damaged in the joining process.

Discussion Several surface modification processes are thought to improve the mechanical and chemical properties of through-hole surfaces in stainless steel pipes and nozzles. Metallurgical response of an AISI steel to different plasma nitriding gas mixtures. Thin Solid Films, 2 Wasa conceived and designed the experiments; T.

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This means that the inner surface of the pipes should be nitrided to have a nitrogen content value that is higher than the maximum nitrogen solubility limit of 0. Applied Physics, 24 7 Advanced Science Letters, 22 11 Materials Characterization, 49 3 Thin Solid Films, 2 Effect of duty cycle on surface properties of AISI using a pulsed plasma nitriding process. Options for accessing this content: It was found that plasma ion nitriding process is more reliable as compared to other existing processes in use.

Effect of frequency on the properties of plasma nitrided AISI steel. Materials Science and Engineering: Surface and Coatings Technology,SS Effects of hydrogen on iron nitriding in a pulsed plasma. Plasma nitriding of stainless steels at low temperatures.

plasma nitriding thesis

The solubility of nitrogen atoms in the steel matrix have been explained through Fe-N system. Procedia Engineering, 68, JWRI, 22 1 Thermodynamic analysis of the FeN system using the compound-energy model with predictions of the vibrational entropy. Surface and Coatings Technology, Wear, Metallurgical and Materials Transactions A, 46 12 The hydrogen—nitrogen mixed gas was blown into the inlet of these nozzles.

A Review on Plasma Ion Nitriding (PIN) Process

Since the metallic melts, the solders, and the chemically active agents flow along plaama inside, its inner surface must be hardened and chemically modified. Glow-discharge nitriding of sintered stainless steels. Figure 8 depicts the optical microscopic image of the specimen with hardness measurement locations from 1 to 3 at the vicinity of the nozzle outlet inner surface.

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Nitride precipitation in salt-bath nitrided interstitial-free steel.

Low Temperature Plasma Nitriding of Inner Surfaces in Stainless Steel Mini-/Micro-Pipes and Nozzles

Table 2 Hardness distribution at the vicinity of the inner surface of the through-hole in the mini-nozzle outlet. International Journal of Advancements in Technology, 2 4 Synthesis of metastable phases via pulsed-laser-induced reactive quenching at liquid-solid interfaces.

plasma nitriding thesis

Each nitriding unit in the cascaded system works as a miniature nitriding reactor with a substantial reduction of processing time in heating and cooling. Catalysis Letters, 13 Electric Arc Furnace Conference Proceedings pp.

nitridnig Abstract In this review paper, an effort has been made to understand the plasma ion nitriding process and other existing nitriding processes used in industries.

PLASMA NITRIDING THESIS

Vacuum, 83 12 , This implies that the inner surface of the through-hole of the mini-nozzle was plasma-nitrided to the extent that a hardness much higher than HV for the bare AISI stainless steels was attained. Dependence of substrate composition. Nitriding kinetics of Inconel Surface structure and properties of ion-nitrided austenitic stainless steels. Low-pressure, high-density plasma nitriding: After plasma nitriding at K for

Relative merits of various ambient gases. The lowpressure RF plasma as a medium for nitriding iron and steel. Microstructure and properties of the compound layer obtained by pulsed plasma nitriding in steel gears. Temperature and dose dependences of nitrogen implantation into iron. Applied Physics Letters, 53 22 , Nitride precipitation in salt-bath nitrided interstitial-free steel.

The solubility of nitrogen atoms in the steel matrix have been explained through Fe-N system. In cellular phones, many devices and sensors are joined onto liquid crystal panels by adhesives, which are deposited onto the joined interface [ 2 ]. Plasma Nitriding of AISI Stainless Steel Pipe In a manner similar to the hollow cathode device in Figure 2 plsama, the nitrogen ion density is expected to increase along the carrier gas flow direction through the pipe and nozzle since the nitrogen atom and NH—radical flux intensity is enhanced toward the outlet of the pipe and nozzle.

plasma nitriding thesis

The lowpressure RF plasma as a medium for nitriding iron and steel. Journal of Applied Physics, 62 3 Microstructure and properties of the compound layer obtained by pulsed plasma nitriding in steel gears. Advanced Science Letters, 22 11 In particular, the highly densified plasma by the hollow-cathode effect provides a means of forming a nitriing nitrided layer at the inner surface of the narrow channels in the mini- and micro-nozzles.

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Effect of additive alloying element on plasma nitriding and carburizing behavior for austenitic stainless steels. Effect of frequency on the properties of plasma nitrided AISI steel.

Effect of carburizing time and wear properties on carburized heat treated Chromium Cr and Nickel- Chromium Ni-Cr steel. Japanese Journal of Applied Physics, 36 7S Modifying the properties of the Inconel nickel alloy by glow discharge assisted nitriding. International Journal of Advancements in Plasmw, 2 4 Oxidation interference in direct laser nitridation of titanium: The effect of nitrdiing plasma nitriding process parameters and role of various alloying elements in the plasma nitriding process have been also discussed.

Low Temperature Plasma Nitriding of Inner Surfaces in Stainless Steel Mini-/Micro-Pipes and Nozzles

Hollow Cathode Device In order to ignite the nitrogen plasmas only in the nozzle through-holes as well as the pipes, the RF-plasmas were confined in the inside of electrically conductive space. Author information Article notes Copyright and License information Disclaimer. The influence of the mode of plasma generation on the plasma nitriding behavior of a microalloyed steel Doctoral Dissertation, University of Wollongong.

Hardness distribution at the vicinity of the inner surface of the through-hole in the micro-nozzle outlet. Influence of nitrided and carbonitrided interlayers on enhanced nucleation of diamond on stainless steel Temperature and dose dependence of nitrogen implantation into iron: Effect of the ion nitriding surface hardening process on fatigue behavior of AISI steel.

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plasma nitriding thesis

In this study, the effect of plasma nitriding on the structure and mechanical properties of cold drawn low alloy AISI steel has been investigated. Hydrogen plays a significant role in the plasma nitriding process. This concept of plasma generation and control was put into practice.

The highest hardness, tensile strength and impact toughness values were obtained from the plasma nitrided steel. Plasma nitriding of AISI ball bearing steel and effect of heat treatment on nitrided layer. Plasma immersion ion implantation using plasmas generated nitridng radio frequency techniques.

Modelling of diffusion—precipitation in nitrided alloyed iron. Open in a separate window.

A Review on Plasma Ion Nitriding (PIN) Process

The structural and mechanical properties especially the fatigue behaviour of the raw, quenched and plasma nitrided AISI steel were examined. Nitrieren von Aluminiumlegierungen mit UV-Laserstrahlung.

plasma nitriding thesis

Journal of Applied Physics, 62 11 Glow-discharge nitriding of sintered stainless steels.