Nickel chromium (NiCr) powders with different titanium diboride (TiB2) additions (20, 40 and 60 wt %) were prepared with a mechanical alloying method and then sprayed using an air plasma spraying technology. The microstructure and phase composite of the powders and the cross-sections of deposited coatings were analyzed with a scanning electronic microscope and X-ray diffraction. The tribologica...

Yttria-stabilized zirconia (YSZ) has been used as a thermal/environmental barrier coating for gas turbine engine blades. Current methods of fabrication include air plasma spraying (APS) and electron-beam physical vapor deposition (EB-PVD). The APS technique results in a coating that loses effectiveness with thermal cycling. The EB-PVD technique deposits a columnar microstructure which accommoda...

The diamond-like carbon (DLC) films deposited on the articulating surface of medical-grade Ti and Ti–6Al–4V were characterized. The DLC films were synthesized by r.f. plasma assisted chemical vapor deposition (PACVD) using C6H6 at 10 mTorr. For wear tests, the ball-ondisk type wear tester was employed by wearing a 5-mm diameter ruby ball against a rotating metal disk. The DLC coating dramatical...

Abstract Wear performance and behavior of as-sprayed TiB2-TiC0.3N0.7 matrix coating were investigated with different rotation speeds counterpart applied load. Analytical balance was used to weigh wear quantity. Scanning electron microscopy observe surface morphology, abrasion scratch, debris researched through an energy dispersive spectrum. It is found the mass loss increases loading load incre...

In this paper, studied was the melting of W powder particles in plasma, their behavior at oxidation as well mechanism hardening on surface substrate. Tungsten coating layers were deposited with vacuum plasma spray technology (VPS) test specimens steel Č.4171 (X15Cr13 EN10027). VPS has advantages over APS due to decreased melted particles, by producing a controlled proportion micro pores and gre...

Within the framework of model nonlocal thermoelastic peak low-energy ion, formation intrinsic stress in a carbon coating deposited from vacuum arc plasma argon atmosphere is theoretically studied. It shown that flow particles bombarding contains, along with C+ ions, also Ar+ ions involved coating. The flux density resulting ionization losses passing through proportional to both and (pressure) a...

titanium and its alloy are known as important load-bearing biomaterials. the major drawbacks of these metals are fibrous formation and low corrosion rate after implantation. the surface modification of biomedical implants through various methods such as plasma spray improves their osseointegration and clinical lifetime. different materials have been already used as coatings on biomedical implan...