中國(guó)有色金屬學(xué)報(bào)(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 32 No. 2 February 2022 |
（1. Departamento de Ingeniería Mecánica Eléctrica, CUCEI, Universidad de Guadalajara, Blvd. Marcelino García Barragán # 1421, Guadalajara, C.P. 44430, México;
2. Departamento de Ingeniería de Proyectos, CUCEI, Universidad de Guadalajara, José Guadalupe Zuno # 48, Los Belenes, Zapopan, C.P. 45150, México;
3. Departamento de Ingeniería de Proyectos, CUCEI, Universidad de Guadalajara-CONACyT, Blvd. Marcelino García Barragán # 1421, Guadalajara, C.P. 44430, México;
4. Instituto de Investigaciones en Ciencias de la Tierra, INICIT, Universidad Michoacana de San Nicolás de Hidalgo, Av. Francisco J. Mujica S/N, Ciudad Universitaria, Morelia, Michoacán, C.P. 58030, México;
5. Unidad Académica de Ingeniería I, Universidad Autónoma de Zacatecas, Av. López Valverde 801, Zacatecas, Zacatecas, C.P. 98060, México;
6. Instituto de Investigaciones Metalúrgicas, IIMM, Universidad Michoacana de San Nicolás de Hidalgo, Edificio ‘‘U-5’’, Ciudad Universitaria, Morelia, Michoacán, C.P. 58030, México）
Abstract:The corrosion and tribocorrosion behavior of Ti6Al4V/xTiN (x=0, 5, 10 and 15, vol.%) composites fabricated by solid-state sintering and their relationship with the microstructure and microhardness were investigated. Simulated body conditions such as a temperature of 37 °C and a simulated body fluid were used. The main results demonstrated a microstructural change caused by the α-Ti stabilization due to solid-solution of nitrogen (N) into the titanium (Ti) lattice, producing a maximum hardening effect up to 109% for the Ti64 matrix by using 15 vol.% TiN. Corrosion potentials of composites changed to more noble values with the TiN particle addition, while corrosion current density of samples increased as an effect of the remaining porosity, decreasing the corrosion resistance of materials. However, changes to a less passive behavior were observed for samples with 15 vol.% TiN. The non-passive behavior of composites resulted in the reduction of the potential drops during rubbing in tribocorrosion tests. Besides, an improvement of up to 88% of the wear rate of composites was seen from the solid-solution hardening. The results allowed to understand the relationship between composition and sintering parameters with the improved tribocorrosion performance of materials.
Key words: Ti64 alloy; composites; powder metallurgy; microstructure; corrosion; tribocorrosion
