Hejun Du

TL;DR: In this article, the authors acknowledge support from the Innovative electronic manufacturing research centre (IeMRC) through the EPSRC funded flagship project SMART MICROSYSTEMS.

TL;DR: A review of the present status of the research and technological development in the field of superhard nanocomposite coatings is attempted in this article, where a number of deposition techniques have been used to prepare Nanocomposites. Among them, reactive magnetron sputtering is most commonly used.

TL;DR: In this article, the authors give a critical review of stress-based and energy-based methods for assessing the toughness of thin films and conclude that, for thin films, the energybased approach, especially the one independent of substrate, is more advantageous.

TL;DR: In this article, a magnetorheological (MR) brake prototype was designed, fabricated and tested, and the effects of magnetic field and rotary speed on the transmitted torque were addressed, and an amplifying factor was introduced to evaluate the brake performance.

TL;DR: In this paper, a critical review on toughening methodologies for hard nanostructural thin films, these are: ductile phase toughness, nanograin boundary strengthening and sliding, composition and structure grading, multilayer design, carbon nanotube tougheng, phase transformation tougheening, compressive stress tougheming, etc.