Showing papers by "Christian Mitterer published in 1991"
TL;DR: In this article, a simple technique for preparing thin foils of hard coatings for transmission electron microscopy analysis is presented, where the structure and morphology of coatings deposited non-reactively as well as reactively by d.c. magnetron sputtering from a ZrB 2 target are investigated.
54 citations
07 Jul 1991-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, wear-resistant coatings of zirconium boride and ZrB 2 have been applied on steel and molybdenum substrates employing non-reactive as well as reactive d.c. magnetron sputtering using zrconium diboride targets.
Abstract: Wear-resistant coatings of zirconium boride and zirconium boron nitride were deposited on steel and molybdenum substrates employing non-reactive as well as reactive d.c. magnetron sputtering using zirconium diboride targets. The characterization of the coatings was done by means of scanning electron microscopy, transmission electron microscopy and X-ray diffraction. The results are discussed in connection with measured mechanical coating properties such as microhardness and adhesion. The optical properties of the coatings were determined using a CIE-L * a * b * colorimeter and specialized corrosion and abrasion tests. Non-reactive sputtering using ZrB 2 targets results in the formation of coatings with a columnar structure and predominantly (001)-orientated ZrB 2 crystals. Coatings deposited at low nitrogen flow rates exhibit very fine-grained or even fracture amorphous structures with a hexagonal ZrBN phase derived from the ZrB 2 lattice. A further increase of the nitrogen flow leads to an amorphous film growth. The maximum Vickers microhardness of the coatings was found to be approximately 2300 HV 0.02 ZrB and ZrBN coatings offer a wide range of interesting colours as well as good corrosion and wear resistance.
54 citations