Results 261 to 270 of about 8,509 (311)

Plasma nitriding of Sm2Fe17

Journal of Alloys and Compounds, 1993
Abstract An intermetallic compound Sm 2 Fe 17 N x was synthesized by plasma nitriding of Sm 2 Fe 17 in a stream of N 2 H 2 mixed gas. The reaction proceeded at a lower temperature (around 423 K) than that of the conventional thermal technique, but not at room temperature.
Ken-ichi Machida, Eiji Yamamoto, Gin-ya Adachi   +2 more
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Cubic Aluminum Nitride Coating Through Atmospheric Reactive Plasma Nitriding

Journal of Thermal Spray Technology, 2010
Aluminum nitride is a promising material for structural and functional applications. Cubic AlN (c-AlN) is expected to have higher thermal conductivity due to their high symmetry; however, its fabrication is difficult. In this study, c-AlN was synthesized by atmospheric plasma spray process through the reaction between Al feedstock powder and nitrogen ...
Mohammed Shahien, Motohiro Yamada, Toshiaki Yasui, Masahiro Fukumoto   +3 more
openaire   +1 more source

Formation of Aluminum Nitrides by Precipitate-Accommodated Plasma Nitriding

MRS Proceedings, 2007
AbstractPrecipitate accommodated nitriding is proposed as a new, non-traditional surface treatment of aluminum alloys. In the case of nitriding the aluminum-copper alloys, Al2Cu plays an important role as a nucleation site to form AlN by the two step reactions of Al2Cu + 2N → 2AlN + Cu and Cu + 2Al → Al2Cu and as a helper to preserve the fast nitrogen ...
Tatsuhiko Aizawa, Patama Vissutipitukul
openaire   +1 more source

Plasma Nitriding Potential and a New Modeling Approach for Plasma Nitriding Process Control

Heat Treating Conference, 2015
Abstract Plasma nitriding is a thermochemical surface heat treatment of steel components to produce nitride layers which increase wear-, corrosion- and fatigue resistance. Research into plasma nitriding lately showed that there is a significant and characteristic amount of ammonia formed off the process gases nitrogen and hydrogen.
Marian Georg Skalecki, Heinrich Klümper-Westkamp, Franz Hoffmann, Hans-Werner Zoch, Sebastian Bischoff, Jörn Rohde   +5 more
openaire   +1 more source

Active Screen Plasma Nitriding

2016
Conventional plasma nitriding has some limitations and disadvantages such as edge effect, hollow-cathode effect (The hollow-cathode effect usually seen in industry resulted by incorrect fixturing. This problem arises from insufficient distance between the parts to be nitrided.
Hossein Aghajani, Sahand Behrangi
openaire   +1 more source

Conventional DC Plasma Nitriding

2016
As known before, the usual source for generating the plasma in plasma nitriding system is DC current (conventional or pulsed). This chapter just includes the results obtained by conventional DC plasma nitriding system on different grades of steels including stainless steels (austenitic, martensitic or precipitation hardening types), tool steels, and ...
Hossein Aghajani, Sahand Behrangi
openaire   +1 more source

Carbon nitride film deposition by active screen plasma nitriding

Materials Letters, 2011
Abstract Deposition of CN-based films by a novel version of active screen plasma nitriding, aiming at surface modification of polymers, is reported. The approach relies on the use of pure graphite as the grid material, which was found to act both as an active screen and as a dry source of carbon atoms for the synthesis of thin films consisting mainly
Ângela E. Crespi, Marcelo E.H. Maia da Costa, Carlos A. Figueroa, Marta E.R. Dotto, Alan P. Kauling, Gabriel V. Soares, Israel J.R. Baumvol, Cristiano Giacomelli   +7 more
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Initial nitride formation during plasma-nitridation of cobalt surfaces

Applied Physics Letters, 2016
Nitridation of metal surfaces is of central importance in microelectronics and spintronics due to the excellent mechanical, thermal, and electrical properties of refractory nitrides. Here, we examine the chemical and structural modification of cobalt surfaces upon nitrogen plasma treatment, using in situ spectroscopic methods, as a method for synthesis
E. C. Mattson, D. J. Michalak, W. Cabrera, J. F. Veyan, Y. J. Chabal   +4 more
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Plasma nitriding of Inconel 625

Surface Technology, 1979
Abstract Inconel 625 was nitrided in an N 2 + H 2 d.c. glow discharge, with the samples of Inconel being bombarded at a high temperature of about 500 °C and a high gas pressure of 3 Torr. Treatment for 10 h under these conditions enhanced the hardness by a factor of about 4.5 compared with the untreated alloy.
A.S. Rizk, D.J. McCulloch
openaire   +1 more source

Formation of aluminum nitride by intensified plasma ion nitriding

Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 1991
Ion nitriding of pure Al with an intensified glow discharge was attempted in the present work. The results showed that formation of aluminum nitride is feasible under low pressure, enhanced plasma conditions. The nitride formed had a dense structure and an ultrafine nuclei size (less than 100 Å).
E. I. Meletis, S. Yan
openaire   +1 more source