Volume 15, Issue 2 (9-2025)
مهندسی خوردگی 2025, 15(2): 85-85 |
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Electrochemical Behavior Study of Ti-10Mo Composite Reinforced with Different Weight Percentages of TiB2 and TiC Produced by Spark Plasma Sintering at 1150 °C. مهندسی خوردگی 2025; 15 (2) :85-85
URL: http://journal.ica.ir/article-1-255-en.html
URL: http://journal.ica.ir/article-1-255-en.html
Abstract: (19 Views)
This research investigated the electrochemical behavior of hybrid composites reinforced with various weight percentages of TiB2 and TiC (0.5, 1.0, 2.0, and 4.0 wt% of each reinforcement) fabricated by Spark Plasma Sintering (SPS) at 1150 °C in Ringer's simulated body fluid. Microstructural results showed that in samples with lower reinforcement percentages, insufficient Molybdenum diffusion and low sintering temperature led to a microstructure with residual Mo and significant porosity, and complete beta phase stabilization did not occur. However, the sample containing 4.0 wt% reinforcement displayed a denser microstructure, beta phase stabilization, and reduced porosity. Potentiodynamic polarization test results showed that increasing the reinforcement content from 0.5 to 4.0 wt% decreased the corrosion current density from 2.72 μA/cm² to 0.29 μA/cm² and increased the polarization resistance (Rp) from 9.55 kΩ.cm2 to 88.09 kΩ.cm2. The sample with 4.0 wt% reinforcement exhibited the highest corrosion resistance. Electrochemical Impedance Spectroscopy (EIS) tests confirmed the results of the potentiodynamic polarization test. The analysis of EIS results shows that the passive layer consists of a porous outer layer and a dense inner layer, with the dense inner layer providing higher resistance. Examination of the corroded surfaces revealed that porosities are preferential sites for the initiation of pitting corrosion, but the 4.0 wt% sample, due to lower porosity, showed a uniform corrosion surface.
Type of Study: Research |
Subject:
General
Received: 2026/02/2 | Accepted: 2025/09/21 | Published: 2025/09/21
Received: 2026/02/2 | Accepted: 2025/09/21 | Published: 2025/09/21
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