Formation of Composite Coatings during Detonation Spraying of Cr3C2

In the current practice of applying carbide-based coatings by thermal spraying, starting material usually contains a metal binder. However, it is important to study possibility spraying binder-free carbides, since components reduce operating temperature and corrosion resistance cermet coatings. this work, powder chromium carbide, Cr3C2, was sprayed using CCDS2000 detonation gun. Acetylene–oxygen mixtures C2H2 + kO2 with k varying from 0.8 3.0 were used as an energetic material. Due chemical reactions between Cr3C2 products, composite nature (multi-phase materials) composition depending on k. At values in range 1.1, along contained carbonitride Cr3N0.4C1.6. 1.3 2.0, Cr7C3 Cr main As increased 3.0, Cr, CrO Cr2O3 oxides formed The mechanical properties wear found depend their phase compositions. Coatings produced may be useful for increasing machine parts mineral acids high-temperature oxidation resistance.