Comparative study of HA/TiO2 and HA/ZrO2 composite coatings deposited by high-velocity suspension flame spray (HVSFS)
| Autor: | Xiao-Bo Bai, Hai-Long Yao, Qing-Yu Chen, Gang-Chang Ji, Hong-Tao Wang, Xiao-Zhen Hu |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Scanning electron microscope Composite number Nanoparticle 02 engineering and technology Surfaces and Interfaces General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Coating Ultimate tensile strength Vickers hardness test Materials Chemistry engineering Composite material 0210 nano-technology Thermal spraying |
| Zdroj: | Surface and Coatings Technology. 351:177-187 |
| ISSN: | 0257-8972 |
| Popis: | To compare with enhancing effects of TiO2 and ZrO2 reinforcement particles in hydroxyapatite (HA) coatings, HA/TiO2 and HA/ZrO2 composite coatings have been deposited on 316 L stainless steel substrates by high-velocity suspension flame spray (HVSFS) technique with the addition contents of 10 wt% and 30 wt% for both TiO2 and ZrO2. Phase structures and compositions of all coatings were analyzed by X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR). Surface morphologies and microstructures were characterized by scanning electron spectroscopy (SEM). Vickers hardness, Young's modulus, tensile strength, wear rate and corrosion resistance were also measured and compared for both HA/TiO2 and HA/ZrO2 composite coatings. Results show that TiO2 particles induced thermal decompositions of HA in HA/TiO2 composite coatings rather than ZrO2 in HA/ZrO2 composite coatings. Both the HA/TiO2 and HA/ZrO2 composite coatings exhibited rough surfaces with spherical/flattened splats and nanoparticle agglomerates as well as bonded coating/substrate interfaces. Although mechanical properties of all composite coatings were improved with increasing addition contents of reinforcements, HA/TiO2 composite coatings showed slightly higher mechanical properties than HA/ZrO2 composite coatings at the same addition content due to higher melting degrees of HA/TiO2 powders. Both HA/TiO2 and HA/ZrO2 composite coatings exhibited comparable and increased corrosion-resist performances in Hanks' simulation body fluids compared to the bare substrate. |
| Databáze: | OpenAIRE |
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