Microstructure and Grain Abrasion Properties of TiC-xNi Coatings Prepared by Electro-thermal Explosion Ultra-high Speed Spraying

摘要

In this work, a new method, electro-thermal explosion ultra-high speed spraying (EEUSS), was utilized to synthesize the titanium carbide based and nickel bonded (TiC-xNi) coatings. The nickel content was varied at the weight percents of 5, 10, 15 and 20%. The microstructure and properties of the coatings were studied by means of scanning electron microscope (SEM), X-ray diffraction (XRD) and microhardness tester, respectively. The TiC-xNi coatings had the metallurgical bonding with the substrate, and consisted of submicron grains. The grain abrasion tests results showed that the abrasion resistance of the coatings was affected by the contents of Ni.