Durability of Titanium/Dicalcium Silicate Composite Coatings in Simulated Body Fluid |
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Authors: | Youtao Xie Xuebin Zheng Xuanyong Liu Chuanxian Ding |
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Affiliation: | (1) Shanghai Institute of Ceramics, Chinese Academy, Shanghai, China |
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Abstract: | Titanium/dicalcium silicate composite coatings with different ratios (weight ratios as Ca2SiO4: Ti = 3:7, 5:5, 7:3) were prepared by plasma spraying. Effects of titanium addition on coating properties, such as bonding
strength, flexural modulus, and dissolution in simulated physiological environment, were studied. Results showed that the
bonding strength between coating and Ti-6Al-4V substrate increased with increase of titanium content in the composite coatings.
It was explained by the narrowed dissimilarity of thermal expansion coefficients between the coatings and substrates. Degradation
of mechanical properties after immersion in simulated body fluid was also studied. The dissolution of dicalcium silicate in
the composite coatings resulted in the decrease of flexural strength and flexural modulus of the coatings in the simulated
physiological environment. The higher titanium content in the composite coatings, the stabler are the composite coatings in
the physiological environment. |
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Keywords: | composite coating durability plasma spraying |
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