Wetting Behavior for Ni on (Ti0.95Mo_(0.05))(C_(0.5)N_(0.5)), (Ti_(0.9)Nb_(0.1))(C_(0.5)N_(0.5)) and (Ti_(0.85)Nb_(0.1)Mo_(0.05))(C_(0.5)N_90.5)) Substrates

摘要

Wetting tests for Ni on (Ti_(0.95)Mo_(0.05))(C_(0.5)N_(0.5)), (Ti_(0.9)Nb_(0.1))(C_(0.5)N_(0.5)) and (Ti_(0.85)Nb_(0.1)Mo_(0.05))(C_(0.5)N_(0.5)) ceramics were carried out at 1823 K and compared with those for the previous data. The larger the Mo content was, the smaller the contact angles were. The contact angle for (Ti_(0.85)Nb_(0.1)Mo_(0.05))(C_(0.5)N_(0.5)) was smaller than for (Ti_(0.95)Mo_(0.05))(C_(0.5)N_(0.5)). No new phase was observed on cross sections of the wet tested samples and microstructures could be divided into three regions: a Ni-rich region, reactive region, and substrate region. The depth of reactive region/height of Ni-rich region ratios for titanium carbonitrides containing Nb were larger than those for them containing Mo, and (Ti_(0.85)Nb_(0.1)Mo_(0.05))(C_(0.5)N_(0.5)) had the largest ratio in all the samples.