Reports by Y.F. Zheng

	A Comparative Study on TiN/Ti, TiC/Ti, TiCN/Ti and ZrN/Zr Coatings Deposited on Ti-50.6at.%Ni Alloy by PIIID
	The Impact of the Taper and Tip Diameter on the Torsional and Bending Properties of Nickel-Titanium Endodontic instruments