The invention relates to a flame-retardant coating for fiber materials comprising at least one film-forming binder and one flame retardant, wherein this comprises melamine polyphosphate as flame retardant. The plasma focusing system can be used to deflect the plasma flow off of the working axis of the cathode. 0 cmsec at the time of this mixing. A Zr-rich amorphous alloy article made by the above-mentioned method is further provided.