Home News Short News Professor Dierk Raabe elected to the National Academy of Engineering Class of 2025 Publications of Huajian Gao All genres Journal Article (1) Journal Article (1) 1. Journal Article Kauffmann, F.; Ji, B.; Dehm, G.; Gao, H.; Arzt, E.: A quantitative study of the hardness in a superhard nanocrystalline titanium nitride/silicon nitride coating. Scripta Materialia 52 (12), pp. 1269 - 1274 (2005) MPG.PuRe DOI