(72) Inventors: BEKIR SAMI YILBAS, DHAHRAN (57) ABSTRACT (SA); SOHAIL AKHTAR, DHAHRAN (SA); CIHAN KARATAS’ ANKARA The laser nitriding method of making phosphor bronze with (TR); CHRIS CHATWIN’ BRIGHTON surface-embedded titanium carbide particles involves coating (GB) a cleaned phosphor bronze workpiece with a thin ?lm formed (73) Assignee: KING FAHD UNIVERSITY OF of a carbonaceous layer mixed w...

The reaction of ammonia decomposition and nitriding reaction as an example of the parallel reactions were studied. A surface reaction was assumed as the rate limiting step. The experiments were carried out in the range of temperatures from 623 to 723 K. Mixtures of different iron nitrides (gamma'-Fe(4)N, epsilon-Fe(3-2)N) were obtained. Differential tubular reactor with thermogravimetric (TG) m...

The duplex treatment of AISI 420 steel samples by nitriding in a radiofrequency inductively coupled plasma (RF-ICP) discharge Ar + N2 H2 atmosphere followed CrAlN coating deposition was performed this study. influence (PN) duration (10, 20, 40, and 60 min) on the structural functional properties duplex-treated determined. A non-linear dependence kinetics found square root PN duration. thickness...

In industries, components must operate under extreme conditions such as high load, speed, temperature and chemical environment. Materials are selected according to commercial availability, cost their properties strength, hardness, etc. AISI 904L is a high-alloy stainless steel with low carbon content, poor surface hardness wear characteristics. Many engineering failures caused by fatigue, corro...

Low-temperature nitriding allows to improve surface hardening of austenitic stainless steels, maintaining or even increasing their corrosion resistance. The treatment conditions be used in order avoid the precipitation large amounts nitrides are strictly related alloy composition. When nickel is substituted by manganese as an austenite forming element, production nitride-free modified layers be...