Titanium/Cobalt (Ti99.95/Co0.05) is a high-purity titanium alloy modified with trace amounts of cobalt to enhance specific mechanical and tribological properties. Combining titanium’s inherent strength, corrosion resistance, and biocompatibility with cobalt’s wear resistance, this alloy is well-suited for advanced engineering, biomedical, and industrial applications (Bălţatu et al., 2024; Besisa & Yajima, 2024).
Material Overview
Physically, Ti99.95/Co0.05 maintains titanium’s exceptional strength-to-weight ratio, low density, and high corrosion resistance, while gaining improved surface hardness and wear resistance from cobalt’s alloying effect. The minimal addition of cobalt (0.05%) strengthens interatomic bonding and reduces frictional wear, enhancing fatigue performance and extending component lifespan. Chemically, the alloy retains titanium’s passive oxide layer, ensuring outstanding stability in harsh environments such as marine and chemical processing conditions (Bălţatu et al., 2024).
Titanium’s native oxide film provides self-healing corrosion protection, while the trace cobalt addition contributes to superior performance under cyclic or sliding stress. These combined properties make Ti99.95/Co0.05 both durable and biocompatible, supporting applications where long-term material integrity is essential (Shilkamy & Abdou, 2024).
Processing and Surface Modification
The alloy can undergo advanced processing and surface treatments such as ion implantation and plasma immersion techniques, which further improve corrosion resistance, hardness, and biocompatibility (Meireles et al., 2015). In aerospace and industrial settings, cobalt-based coatings on titanium substrates are often used to mitigate fretting wear and surface fatigue, enhancing operational reliability in high-stress environments (Fiala & Hajmrle, 2010).
Applications and Advantages
Aerospace and engineering applications. The Ti99.95/Co0.05 alloy is used for aircraft components, engine parts, and structural assemblies where lightweight materials must endure extreme mechanical loads and temperature fluctuations. The cobalt addition improves antifretting behavior in components like turbine blades and fasteners (Fiala & Hajmrle, 2010).
Biomedical applications. The alloy’s biocompatibility and resistance to corrosion make it ideal for dental implants, orthopedic devices, and surgical instruments. Cobalt enhances wear resistance and reduces microdebris formation, contributing to improved implant longevity and tissue compatibility (Shilkamy & Abdou, 2024).
Industrial and automotive uses. Titanium’s low density and strength improve fuel efficiency and performance in the automotive industry, while the cobalt addition increases durability under frictional stress. In marine and chemical environments, the alloy’s passive oxide layer ensures long-term stability against corrosion and oxidation (Bălţatu et al., 2024).
Performance Benefits
- High strength-to-weight ratio with excellent fatigue resistance.
- Superior corrosion resistance in marine and biomedical environments.
- Enhanced surface hardness and wear resistance due to cobalt addition.
- Excellent biocompatibility for medical and dental applications.
- Improved antifretting performance for aerospace and turbine systems.
Goodfellow Availability
Goodfellow supplies Titanium/Cobalt (Ti99.95/Co0.05) in a variety of forms suitable for research, aerospace, biomedical, and industrial use. Available as wire, foil, rod, and powder, this alloy provides a balance of mechanical performance and corrosion resistance ideal for demanding environments.
Explore Titanium/Cobalt (Ti99.95/Co0.05) and related titanium-based alloys in Goodfellow’s online catalogue: Goodfellow product finder.
References
- Bălţatu, M. S., Vizureanu, P., Sandu, A. V., Achiţei, D. C., Perju, M. C., Burduhos-Nergis, D. D., & Benchea, M. (2024). Perspective Chapter: Titanium – A Versatile Metal in Modern Applications. https://doi.org/10.5772/intechopen.1005742
- Besisa, N. H. A., & Yajima, T. (2024). Titanium-Based Alloys: Classification and Diverse Applications. https://doi.org/10.5772/intechopen.1005269
- Fiala, P., & Hajmrle, K. (2010). Cobalt-Based Antifretting Coatings. https://doi.org/10.1115/GT2010-23547
- Shilkamy, H., & Abdou, A. (n.d.). Studies on Corrosion Behavior and Biomedical Applications of Titanium-Based Materials: A Comprehensive Review. Sohag Journal of Science. https://doi.org/10.21608/sjsci.2024.243679.1137
- Meireles, V. M., Fernandes, B. B., Ueda, M., & Ramos, A. S. (2015). Análise de Propriedades Físico-Químicas em Ligas à Base de Titânio Tratadas pelo Método de Implantação Iônica por Imersão em Plasma. https://doi.org/10.5151/CHEMENG-COBEQIC2015-410-34025-266725
- Sanchez, P. N. (2010). Titanium Alloys: Preparation, Properties, and Applications.