Detonation Spraying of Binder-Free Tungsten Carbide: In-Situ Formation of Composite Coatings

被引：2

作者：

Batraev, Igor S. ^{[1
]}

Ulianitsky, Vladimir Yu ^{[1
,2
]}

Shtertser, Alexandr A. ^{[1
]}

Dudina, Dina, V ^{[1
,3
]}

Ukhina, Arina, V ^{[3
]}

机构：

[1] Russian Acad Sci, Siberian Branch, Lavrentyev Inst Hydrodynam, Lavrentyev Ave 15, Novosibirsk 630090, Russia

[2] Russian Acad Sci, Siberian Branch, Lavrentyev Ave 17, Novosibirsk 630090, Russia

[3] Russian Acad Sci, Siberian Branch, Inst Solid State Chem & Mechanochem, Kutateladze Str 18, Novosibirsk 630090, Russia

来源：

JOURNAL OF THERMAL SPRAY TECHNOLOGY | 2023年 / 32卷 / 01期

关键词：

cermet; coatings; detonation gun spraying; hardness; tungsten carbide; MICROSTRUCTURE; CERAMICS;

D O I：

10.1007/s11666-022-01486-x

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

For the first time, the formation of coatings by detonation spraying (DS) of a binder-free tungsten carbide, WC, was studied. The coating phase composition was shown to depend on the O/C molar ratio in the oxygen-acetylene mixture used for the spraying. Along with WC, cubic carbide/oxycarbide WC1-xOy, tungsten semicarbide W2C and metallic W were present in the coatings formed at O/C = 0.9 and O/C = 1.0, indicating the formation of cermet composite coatings. When O/C was greater than 1.1, WC almost fully transformed into metallic tungsten in the coatings. The hardness of the cermet coatings was higher than that of the metallic tungsten-based coatings. During the coating formation, noticeable compression stresses accumulated in the deposited layers. These stresses do not lead to coating detachment or cracking: coatings with thicknesses of up to 500 mu m retain their integrity.

引用

页码：249 / 258

页数：10

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