Abstract No.:	4551
Title:	Characterization and properties of cermet coatings by a new multi-chamber detonation sprayer
Authors:	Jeff Jia / Beijing United Coatings Technologies Co., China M. Kovaleva / Belgorod State National Research University, Joint Research Center, Russia Yuriy Tyurin/ E.O. Paton Electric Welding Institute, NASU, Ukraine Jeff Jia/ Beijing United Coatings Technologies Co., Beijing, China, China N. Vasilik/ N.N. Semenov Institute of Chemical Physics, RAS, Russia O. Kolisnichenko/ E.O. Paton Electric Welding Institute, NASU, Ukraine M. Prozorova/ Belgorod State National Research University, Joint Research Center, Russia M. Arseenko*/ aBelgorod State National Research University, Joint Research Center Belgorod, Russia, Russia V. Sirota/ Belgorod State National Research University, Center for Constructional Ceramics and the Engineering Prototyping, Russia
Abstract:	The work reported presents the results of a design of experiment study carried out on a new multi-chamber detonation sprayer (MCDS) used to prepare cermet coatings. A series of cermet coatings WC-10Co-4!r, Cr3C2-NiCr and Cr3C2-TaC-NiCr have been prepared on a steel substrate. The microstructures and properties of cermet coatings were examined with the use of optical microscopy, scanning electron microscopy, X-ray phase analysis, and a Vickers hardness tester at a test load of 300 g. The wear behavior was carried out by the ball-on-disk tests. The thickness of cermet coatings was varied in the range of 80 to 375 microns. MCDS application allows the formation of a dense layer with porosity of less than 1.0 % and hardness of 974, 980, 780 (±200 HV0.3), respectively WC-10Co-4!r, Cr3C2-NiCr and Cr3C2-TaC-NiCr. The cermet coatings show the low specific wear rate 1.2, 1.1, 2.3410-5mm3 (mN)-1. The wear rate of cermet coating was found to be lower than that of steel. The results of this work open up new prospects for the further elaboration of new technologies for making protective cermet coatings that can enhance the protective and wear-resistant properties of industrial iron and iron alloy machinery parts.

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