NOVELTY - The workpiece comprises a base body (1) and a silicon diamond-like carbon (Si-DLC) containing cover layer (6), which has: a hydrogen content of 5-10 atomic%; a thickness of 0.8-2 mu m; a hardness of 25-40 GPa; a friction coefficient of 0.05-0.1; a wear coefficient of 0.5-1.5x 10-15 m3/(N-m) according to Kalotest having aluminum oxide-powder in glycerin; a unit Rockwell A test for the base metal made of hard metal and an other unit Rockwell C test measuring adhesive strength of HF1-HF2; an average silicon content of 5-30 atomic%; and an additive of 0.01-6 atomic-%.    USE - Used as a workpiece including a motor part of an internal combustion engine, a transmission part from an automobile gear, a connecting rod, a gear part, a gearwheel, a shaft, a bearing shell, a roller bearing, a ball bearing, a needle bearing, a piston ring, a piston pin, a cylinder liner, a part of a fuel injection device for a direct injection of diesel or gasoline for automobile engines, a part made of valve train of an automobile engine, a cup tappet, a towing lever, a tilting lever, a valve plunger, a linear guide, a closing bracket for automobile doors, and a anti-friction bush or a solar cell (claimed).    ADVANTAGE - The workpiece has high hardness, low sliding friction-coefficient and high wear resistance.    DETAILED DESCRIPTION - The workpiece comprises a base body (1) and a silicon diamond-like carbon (Si-DLC) containing cover layer (6), which has: a hydrogen content of 5-10 atomic%; a thickness of 0.8-2 mu m; a hardness of 25-40 GPa; a friction coefficient of 0.05-0.1; a wear coefficient of 0.5-1.5x 10-15 m3/(N-m) according to Kalotest having aluminum oxide-powder in glycerin; a unit Rockwell A test for the base metal made of hard metal and an other unit Rockwell C test measuring adhesive strength of HF1-HF2; an average silicon content of 5-30 atomic%; an additive of 0.01-6 atomic-% from boron, sulfur and/or its mixtures; and bilayers and other bilayers that consist of Si-DLC and diamond-like carbon (DLC) or Si-DLC and metal diamond like carbon (Me-DLC), which is designed as tungsten diamond like carbon (W-DLC). The bilayers are arranged between the other bilayers and the base body. A ratio of the thickness of the DLC-layer to the Si-DLC-layer in the bilayers is greater than or equal to 1.2, and the ratio of the thickness of the DLC-layer to the Si-DLC-layer in the other bilayers is less than 0.8. The alternating layers (6A) and (6B) and/or (6C) and (6D) each have a thickness of 1-5 nm respectively. The average silicon content is 5-25 atomic% in the cover layer, and increases with increasing distance from the base body. The workpiece is arranged between the cover layer and the base body. The workpiece comprises a first mediator layer made of silicon carbide (SiCx), metal carbide (MeCX) or tungsten carbide (WCX). The first mediator layer is arranged: between the first mediator layer and the cover layer; and to the first mediator layer adjacent to a second mediator layer comprising DLC, Si-DLC or Me-DLC. The mediator layers are present as given in the specification. The workpiece comprises: a first layer system from bilayers comprising (SiCx/WCx), (SiCx/MeCx), (WCx/SiCx) or (MeCx/SiCx); a second layer system comprising (WCx/W-DLC); and a third mediator layer made of Me-DLC or DLC. The first and second layer systems are present as given in the specification. An INDEPENDENT CLAIM is included for a method for physical vapor deposition-coating of workpieces.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a workpiece.    Base body (1)    Third mediator layer (5)    Cover layer (6)    First layer system (30)    Second layer system. (40)