@article{Brust_Röttger_Theisen_2015, title={New wear-resistant materials for mining applications}, volume={3}, url={https://icscm.ub.rub.de/index.php/ICSCM/article/view/410}, DOI={10.13154/icscm.3.2015.272-280}, abstractNote={Economic and political driving forces are leading to an ambitious search for substitutes for fused<br />tungsten carbide (FTC) in ultra-high wear-resistant metal matrix composites (MMC), which are<br />used for mining applications. In the presented paper, possible substitutes such as alumina (Al<sub>2</sub>O<sub>3</sub>),<br />zirconia (ZrO<sub>2</sub>) and silicon carbide (SiC) are discussed. To enhance the wettability of oxides (e. g.<br />Al<sub>2</sub>O<sub>3</sub>, ZrO<sub>2</sub>) by Fe-base melts or to counteract strong dissolution of metastable covalent bonded<br />hard-particles (e.g. SiC) it is proposed to coat the particles with a thin titanium nitride (TiN) layer by<br />means of chemical vapor deposition (CVD). For this reason a CVD-apparatus for particle coating<br />was constructed and is shown in this paper. In addition, it is demonstrated that such a TiN coating<br />on the oxide particles can increase the wettability and therefore improve the embedding behavior<br />of the particles into a Fe-base matrix. In addition, it is shown that TiN coatings on covalent bonded<br />hard-particle SiC can be used as a diffusion barrier coating, thus counteracting a dissolution of the<br />hard-particles during processing by sintering techniques. However, due to the difference in linear<br />thermal expansion coefficients the coating tends to delaminate, partially.}, journal={International Conference on Stone and Concrete Machining (ICSCM)}, author={Brust, S. and Röttger, A. and Theisen, W.}, year={2015}, month={Nov.}, pages={272–280} }