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Magnesium alloys found a plethora of applications in various branches of industry where reduction in weight is of importance (Gray & Luan, 2002). These alloys are used in aerospace, automobile and electronic industries, for manufacturing of sporting goods etc. Advantages of magnesium alloys include: the high strength: weight ratio, high thermal conductivity, small heat extensibility, good welding characteristics and high functional integrity, which allow to produce near-net-shape elements as well as good machinability (Hawkins, 1993). However, magnesium alloys have also certain disadvantages. The most troublesome of them is the high susceptibility to corrosion, which contributes to dwindling of their size and reduces mechanical durability. Other disadvantages of magnesium alloys comprise their weak wear resistance, a drop in durability at high temperature and interference of electromagnetic field. The aforementioned faults considerably reduce the area of application of this material. Presented studies aimed at elimination of the listed drawbacks by means of covering of magnesium alloy AZ31 with special hard carbon coatings to form a protective barrier with decorative appearance. Plasma Activated Chemical Vapor Deposition (PACVD) method was used for this purpose. Optimum conditions of this process were determined and the material properties of the coatings were characterized.

Properties of Hard Carbon Coatings Manufactured on Magnesium Alloys by PACVD Method