Surface Modification of Titanium Alloys Using Alumina Particles Blasting for Biomedical Applications

Abstract:

Ti-based bulk metallic glass (BMG) is a new class of titanium alloys that exhibits excellent properties for biomedical applications. They have high strength, good corrosion resistance, low elastic modulus and satisfactory biocompatibility. Therefore, Ti-based BMG is an excellent alternative material to be used in biomedical application. Titanium alloy with a nominal composition of the Ti₄₀Zr₁₀Co₃₆Pd₁₄ was synthesized by replacing Cu with Co in a better-known bulk glass forming composition. Coin-shape samples with a diameter of 15 mm and thickness of 1 mm were prepared by arc-melting and casting into copper mold. The coin-shape samples were polished, then followed by blasting with 50 μm and 250 μm average particle sizes of alumina. Alumina blasting caused plastic deformation at the surface and induced change in surface roughness. The larger size of alumina particle, the higher the R_a, R_q and R_t with significant difference. Some abrasive alumina particles were found to be embedded onto the blasted surface. The blasted Ti₄₀Zr₁₀Co₃₆Pd₁₄ sample showed lower roughness values than those blasted Ti-6Al-4V samples. This may be because of the higher hardness values of Ti₄₀Zr₁₀Co₃₆Pd₁₄ sample, when compared to the softer Ti-6Al-4V samples. The contact angle measurement which demonstrated wettability of all samples did not show significant difference in a tested range of R_a (from 40 to 428 nm).

• Periodical: Advanced Materials Research (Volume 983)
• Pages: 135-140
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.983.135
• Online since: June 2014
• Authors: Suparat Udomlertpreecha, Prasit Pavasant, Boonrat Lohwongwatana*
• Keywords: Biomedical Applications, Blasting, Roughness, Titanium, Wettability

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