Comparative study of HATiO2 and HA-ZrO2 composite coatings deposited by high-velocity suspension flame spray (HVSFS)
Comparative study of HATiO2 and HA-ZrO2 composite coatings deposited by high-velocity suspension flame spray (HVSFS)
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高速悬浮火焰喷涂 (HVSFS) 沉积 HATiO2 和 HA-ZrO2 复合涂层的对比研究
DOI：
10.1016/j.surfcoat.2018.07.082
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Gang-Chang Ji
中科院分区：
文献类型：
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作者：
Hailong Yao;Xiao-Zhen Hu;Xiao-Bo Bai;Hong-Tao Wang;Qing-Yu Chen;Gang-Chang Ji
为了比较TiO 2和ZrO 2增强颗粒对羟基磷灰石（HA）涂层的增强效果，采用高速悬浮火焰喷涂（HVSFS）技术在316 L不锈钢基体上制备了HA/TiO 2和HA/ZrO 2复合涂层，其中TiO 2和ZrO 2的添加量分别为10wt%和30wt%。利用X射线衍射仪（XRD）和傅里叶变换红外光谱仪（FTIR）分析了涂层的相结构和成分。利用扫描电子能谱仪（SEM）对表面形貌和微观结构进行了表征。对HA/TiO 2和HA/ZrO 2复合涂层的维氏硬度、杨氏模量、拉伸强度、磨损率和耐蚀性进行了测试和比较。结果表明，在HA/TiO 2复合涂层中，TiO 2颗粒诱导了HA的热分解，而在HA/ZrO 2复合涂层中，ZrO 2颗粒诱导了HA的热分解。HA/TiO 2和HA/ZrO 2复合涂层表面粗糙，涂层/基体界面结合良好。随着增强体添加量的增加，复合涂层的力学性能均有所提高，但由于HA/TiO 2粉末的熔融程度较高，在相同添加量下，HA/TiO 2复合涂层的力学性能略高于HA/ZrO 2复合涂层。HA/TiO 2和HA/ZrO 2复合涂层在Hanks模拟体液中的耐腐蚀性能与裸基体相当，且有所提高。
To compare with enhancing effects of TiO2and ZrO2reinforcement particles in hydroxyapatite (HA) coatings, HA/TiO2and HA/ZrO2composite 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 TiO2and 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/TiO2and HA/ZrO2composite coatings. Results show that TiO2particles induced thermal decompositions of HA in HA/TiO2composite coatings rather than ZrO2in HA/ZrO2composite coatings. Both the HA/TiO2and HA/ZrO2composite 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/TiO2composite coatings showed slightly higher mechanical properties than HA/ZrO2composite coatings at the same addition content due to higher melting degrees of HA/TiO2powders. Both HA/TiO2and HA/ZrO2composite coatings exhibited comparable and increased corrosion-resist performances in Hanks' simulation body fluids compared to the bare substrate.