Processing, Mechanical and Optical Properties of Additive-Free ZrC Ceramics Prepared by Spark Plasma Sintering oleh Clara Musa, Roberta Licheri, Roberto Orrù, Giacomo Cao, Diletta Sciti, Laura Silvestroni, Luca Zoli, Andrea Balbo, Luca Mercatelli, Marco Meucci, Elisa Sani