Results 251 to 260 of about 7,907 (301)

Gas nitriding – process control and nitriding non-ferrous alloys

Surface Engineering, 2001
This paper, based on the Second Lakhtin Memorial Lecture, gives an overview of the developments in the process control of gas nitriding and describes the current status of nitriding of non-ferrous alloys. Control of the nitriding process involves both thermodynamic and kinetic factors.
B. Reinhold, K. Wilsdorf
openaire   +1 more source

Mechanochemistry of lithium nitride under hydrogen gas

Physical Chemistry Chemical Physics, 2015
This article unveils reaction paths and chemical kinetics during mechanochemical hydrogenation of lithium nitride, a key material for hydrogen storage.
Z, Li, J, Zhang, S, Wang, L, Jiang, M, Latroche, J, Du, F, Cuevas   +6 more
openaire   +2 more sources

Synthesis of Aluminum Nitride Nanopowder by Gas‐Reduction–Nitridation Method

Journal of the American Ceramic Society, 2003
Aluminum nitride (AlN) nanopowder was successfully synthesized from transition alumina nanopowder using an NH 3 –C 3 H 8 gas mixture as a reduction–nitridation agent.
Takayuki Suehiro, Naoto Hirosaki, Ryo Terao, Junichi Tatami, Takeshi Meguro, Katsutoshi Komeya   +5 more
openaire   +1 more source

Gas Nitriding and Gas Nitrocarburizing of Steels

2013
AbstractThis article summarizes the terminology for gas reactions, and discusses low-temperature nitriding and nitrocarburizing of stainless steels. It describes the various nitriding processes, namely, high- and low-pressure nitriding, oxynitriding, sulfonitriding, oxysulfonitriding, ferritic nitrocarburizing and austenitic nitrocarburizing.
K.-M. Winter, J. Kalucki
openaire   +1 more source

Brief gas nitriding of structural steels

Metal Science and Heat Treatment, 1977
1. Nitriding in a mixture of 50% NH3+50% natural gas at 570° for 6–8 h ensures formation of a carbonitride layer as thick as 20 μ consisting of e and γ′ phases and a diffusion zone with a thickness ∼0.3 mm. 2. Brief nitriding of steel 40Kh increases the fatigue strength more than twice. 3.
V. V. Goryushin, V. N. Glushchenko, M. E. Duka, G. A. Kondrasheva   +3 more
openaire   +1 more source

High-Pressure Gas Nitriding of Steels

Metal Science and Heat Treatment, 2004
The structure, hardness, and thickness of the hardened layer on steel 16Kh2N3MFBAYu-Sh (martensitic class), steel 12Kh18N10T (austenitic class), and iron are studied after nitriding at a nitrogen pressure of 100 – 150 MPa and temperature of 950 – 1150°C with 3-h hold and after additional heat treatment consisting of 1-h tempering at 300 – 600°C.
S. A. Gerasimov, V. A. Golikov, M. A. Gress, G. G. Mukhin, V. I. Snop   +4 more
openaire   +1 more source

Solar gas nitriding of Ti6Al4V alloy

Applied Surface Science, 2013
Abstract The main purpose of this work was to study the activating effect of concentrated solar energy (CSE) on the high-temperature nitriding of Ti6Al4V alloy. Solar nitriding was conducted using a low-cost solar installation based on a Fresnel lens with a maximum density power of 250 W/cm2 at its focus.
Gloria P. Rodriguez, Gemma Herranz, Ana Romero   +2 more
openaire   +1 more source

Titanium alloys after surface gas nitriding

Surface and Coatings Technology, 2006
Abstract Experimental studies using differential scanning calorimetry (DSC) for nitriding of four titanium-alloys near α Ti–8Al–1Mo–1V, near α Ti–6Al–2Sn–4Zr–2Mo, α + β Ti–6Al–4V and near β Ti–10V–2Fe–3Al at different temperatures and for different periods of time are presented.
Zhecheva, A., Malinov, Savko, Sha, Wei
openaire   +1 more source

Gas Nitriding of Steel Parts

2017
<div class="section abstract"> <div class="htmlview paragraph">This specification covers a process for surface-hardening parts, made from appropriate low-alloy steels (See <span class="xref">8.4</span>), by the introduction of nitrogen from ammonia.</div></div>
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Gas pressure sintering of ?-silicon nitride

Journal of Materials Science, 1991
The sintering behaviour of β-Si3N4 powder was investigated in 980 kPa (10 atm) nitrogen at 1800–2000 °C. It is shown that β-Si3N4 has a higher sinterability than the finer α-Si3N4. The solution of small grains and reprecipitation on large grains occurred during sintering at >1600 °C.
M. Mitomo, S. Uenosono
openaire   +1 more source