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glow-discharge process

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900071
EISBN: 978-1-62708-350-8
... with an overview of the history of ion nitriding. This is followed by sections that describe how the ion nitriding process works, glow discharge characteristics, process parameters requiring good control, and the applications of plasma processing. The chapter explores what happens in the ion nitriding process...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900001
EISBN: 978-1-62708-350-8
... and to supply nitrogen ions for nitriding (see Chapter 8 for details). The process dates back to the work of a German physicist, Dr. Wehnheldt, who in 1932 developed what he called the “glow discharge” method of nitriding. Wehnheldt encountered severe problems with the control of the glow discharge. He...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900089
EISBN: 978-1-62708-350-8
...) for different types of discharge in argon Fig. 7 Hot-wall plasma nitriding furnace. Arrows indicate the air blowers that cool the external process vessel wall. Courtesy of Plateg GmbH Fig. 8 Power characteristics (a) Continuous dc. (b) Pulsed dc. Abnormal glow discharge (see Fig. 5 ) occurs...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900185
EISBN: 978-1-62708-350-8
... Fig. 1 Complete glow seam coverage, ensuring complete nitriding of all surfaces. Courtesy of Plateg GmbH Fig. 2 Workpiece during plasma nitriding with continuous dc glow discharge. Numerous micro-arcs are visible on the workpiece surface and may produce microscopic damage. A large...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410551
EISBN: 978-1-62708-265-5
..., travel through the vacuum, and deposit on a substrate ( Ref 22.32 ). For many applications, deposition processes that are based solely on thermal evaporation are being replaced by sputtering and ion plating, more efficient processes that use glow discharge plasmas. Sputtering is a coating process...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.htgpge.t67320159
EISBN: 978-1-62708-347-8
.... For selective ion nitriding, masking by mechanical means such as plate covers, which act as barriers between the glow of discharge and the part surfaces, is advisable. Masking with copper plating causes sputtering and is not advisable. As an alternate to masking, parts may be nitrided all over first...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900139
EISBN: 978-1-62708-350-8
... 27 (in German) 13. Marciniak A. , “ Processes of the Cathode Heating and Nitriding under a Glow Discharge Condition, ” Ph.D. dissertation, Warsaw University of Technology , 1983 (in Polish) 14. Marciniak A. , Surf. Eng. , Vol 1 , 1985 , p 283 10.1179/sur.1985.1.4.283...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900305
EISBN: 978-1-62708-358-4
... efficient sputtering or ion-plating processes using glow discharge plasmas. Sputtering is a PVD coating process in which atoms are ejected mechanically from a target by the impact of ions or energetic neutral atoms. Figure 16-8 shows schematically the mechanism of sputtering in a simple diode system...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250227
EISBN: 978-1-62708-345-4
... to the high magnitude of a fluctuating load. Ion, or plasma, nitriding is a vacuum process that takes place in the plasma of high current glow in a vessel. The workpiece, in this case, a gear, forms the cathode, whereas the vessel wall is the anode. The vessel is evacuated prior to nitriding. Gas...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240395
EISBN: 978-1-62708-251-8
... carburizing is basically a vacuum process using glow discharge to introduce carbon-bearing ions to the steel surface for subsequent diffusion. This process is effective in increasing carburization rates because the process bypasses the several dissociation steps that are required to produce active soluble...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440141
EISBN: 978-1-62708-262-4
... case. Nitrided cases also have greater resistance to softening from heat compared with carburized cases. Plasma (Ion) Nitriding Plasma, or ion, nitriding is a method of surface hardening using glow discharge technology to introduce nascent (elemental) nitrogen to the surface of a metal part...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350231
EISBN: 978-1-62708-315-7
... energy. Synonymous with plasma carburizing or glow- discharge carburizing. ion implantation. The process of modifying the physical or chemical properties of the near surface of a solid (target) by embedding appro- priate atoms into it from a beam of ionized particles. Glossary of Terms / 245 ion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.9781627083157
EISBN: 978-1-62708-315-7
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740325
EISBN: 978-1-62708-308-9
... coatings and various pack cementation and deposition processes. It also discusses the selection and use of industrial paints and paint application methods. buffing cleaning coating honing mass finishing SURFACE FINISHES AND COATINGS are used in a variety of ways to improve the material...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230361
EISBN: 978-1-62708-298-3
... subjected to physical sputtering by positive ions, usually argon, produced in a glow discharge. The sputtered material is emitted as a cosine distribution, depositing on a substrate. (The cosine distribution gives the amount or intensity that is emitted from some source as a function of cosine θ. The form...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060197
EISBN: 978-1-62708-261-7
.... A lamellar shape has more surface energy than a spherical shape, and so lamellar cementite has a tendency to become spheroidized at temperatures just below the lower critical temperature (Ac 1 ). In fact, heat treatments are used to accelerate this process (see “ Spheroidizing ” in section 9.5...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2023
DOI: 10.31399/asm.tb.stmflw.t59390039
EISBN: 978-1-62708-459-8
... Abstract This chapter covers the different types of wear encountered in metalworking processes. It discusses the mechanisms involved in adhesive, abrasive, chemical, and fatigue wear and key contributing factors, including the composition and structure of tool and workpiece materials...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350095
EISBN: 978-1-62708-315-7
... to equipment costs and throughput. Plasma (Ion) Carburizing Plasma (ion) carburizing is basically a vacuum process utilizing glow-discharge technology to introduce carbon-bearing ions to the steel surface for subsequent diffusion ( Ref 11 ). This process is effective in increasing carburization rates...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140189
EISBN: 978-1-62708-264-8
... is called a plasma or a glow discharge. A problem with trying to carburize steels using only natural gas (methane, CH 4 ) is that the rate of step 1 of the carburizing process is much lower than that obtained with endo gas. However, the step 1 rate for pure methane can be increased dramatically by either...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2023
DOI: 10.31399/asm.tb.stmflw.9781627084598
EISBN: 978-1-62708-459-8