Papers by Keyword: WC Coating

Abstract: In the article, the authors describe the WC coatings deposited by the High Power Impulse Magnetron Sputtering (HiPIMS) method. Industrial equipment was used to prepare the charges. A mixture of argon and krypton (Ar+Kr) gases was used as the working gas. Three coatings were deposited where the frequency was varied in the range from 1000 Hz to 2500 Hz. The thickness ranged from 2.8 µm to 6.8 µm was achieved. The thickness increased with the frequency of the coating process. The authors further evaluated mechanical properties such as roughness, hardness and Young's modulus and tribological properties such as coefficient of friction and wear. The measured properties were compared with the authors' published results in the articles of renowned scientific journals. The measured results compared with published results in scientific journals showed that the increase in frequency has an effect on the kinetic energy of the incident Ar+Kr ions. This causes a greater amount of dusted WC particles from the target, which results in a greater thickness of the deposited coating.

Abstract: The residual stresses of WC coating prepared by flame spraying and laser re-melting were measured quantitatively with X-ray diffraction (XRD) stress tester, and its micro-structures were observed with SEM, and the effects of residual stress on bonding strength of coating interface were analyzed. The experimental results are shown that residual stresses of WC coating are all tensile, and the effects of coating thickness on its residual stress is obvious, and residual stress is verse ratio with its thickness; Coating stress influences its cracking, tensile stress speeds its cracking, which causes its bonding strength decrease; The stress state is improved by decreasing its thickness, and its bonding strength can be increased.