Synthesis of Hf-C-N ceramics by spark plasma sintering Alexey Zavjalov, Evgeniy Papynov, Oleg Shichalin, Pavel Nikiforov and Evgenii Goncharov EPJ Web Conf., 196 (2019) 00012 Published online: 14 January 2019 DOI: 10.1051/epjconf/201919600012