Investigation of Pore Size Effect on the Infiltration Process of Ti6Al4V/xAg Metal Matrix Composites.

• Tác giả: Dante Arteaga, Elena Mihalcea, Luis Olmos, Víctor Manuel Solorio-García, Jorge Sergio Téllez-Martínez, Héctor Javier Vergara-Hernández, Juan Israel Villa-Tapia
• Ngôn ngữ: eng
• Thông tin xuất bản: Switzerland : Materials (Basel, Switzerland) , 2025
• Bộ sưu tập: NCBI
• ID: 705916

Tóm tắt

This work investigates the fabrication of Ti6Al4V composites manufactured by powder metallurgy through pressureless infiltration. Porous Ti6Al4V alloy compacts with different particle sizes were fabricated by sintering and then, liquid Ag was infiltrated to obtain composites. Computed microtomography was used to analyze the samples before and after infiltration. Numerical flow simulations and dilatometry tests evaluated the kinetics of Ag infiltration into porous Ti6Al4V compacts. Microstructure was observed by SEM and mechanical strength was evaluated by compression tests. Results showed that the pore properties play a crucial role in the infiltration timing and the distribution of the Ag's liquid. In particular, large pores allowed the infiltration to start a few °C degrees earlier than samples with smaller pores. Three-dimensional images after infiltration showed that most of the pores were filled and the remaining ones were isolated. The resulting microstructure was composed of Ti