Researchers Detail New Studies and Findings in the Area of Tungsten Carbide Coatings Technology

By a News Reporter-Staff News Editor at Journal of Technology -- Investigators discuss new findings in Tungsten Carbide Coatings Technology. According to news reporting originating from Dortmund, Germany, by VerticalNews correspondents, research stated, "The phenomenon of glass-to-mold sticking is a major problem for industrial glass forming processes. Ternary TiAIN coatings attracted considerable industrial interest because of their excellent tribological performance and high oxidation resistance at high temperatures."

Our news editors obtained a quote from the research from Technical University, "Recently, multicomponent CrAlSiN and TiAISIN coatings have been developed in order to gain high hardness and good thermal stability at temperatures exceeding 800 degrees C. In this study, CrAlSiN, TiAlSiN and AlTiN coatings were deposited on tungsten carbide substrates by using a cathodic-arc deposition system with lateral rotating arc cathodes. Titanium, chromium and AlSi (12 at.% of Si) cathodes were used for the deposition of CrAlSiN and TiAlSiN coatings. All the deposited CrAlSiN, TiAlSiN and AlTiN coatings showed a B1-NaCl crystal structure. The deposited CrAlSiN and TiAlSiN coatings exhibited nanocrystalline structure and possessed hardness as high as 35-37 GPa after annealing at 700 degrees C in air. The wettability of the CrAlSiN, TiAlSiN and AlTiN coated tungsten carbides by molten glass at temperatures between 300 degrees C and 700 degrees C in controlled air under 1.6 Pa was measured by using an improved sessile drop method."

According to the news editors, the research concluded: "The CrAlSiN showed a low oxidation rate and a non-wetting characteristic superior to TiAlSiN and AlTiN coatings."

For more information on this research see: High temperature wettability of multicomponent CrAlSiN and TiAlSiN coatings by molten glass. Surface & Coatings Technology, 2013;231():24-28. Surface & Coatings Technology can be contacted at: Elsevier Science Sa, PO Box 564, 1001 Lausanne, Switzerland. (Elsevier - www.elsevier.com; Surface & Coatings Technology - www.elsevier.com/wps/product/cws_home/504101)

The news editors report that additional information may be obtained by contacting Y.Y. Chang, Technical Univ Dortmund, Dept. of Mech Engn, Dortmund, Germany. Additional authors for this research include C.M. Cheng, Y.Y. Liou, W. Tillmann, F. Hoffmann and T. Sprute.


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