Dense nanostructured calcium phosphate coating on titanium by cold spray
Dense nanostructured calcium phosphate coating on titanium by cold spray
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DOI：
10.1016/j.jeurceramsoc.2016.11.040
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发表时间：
2017-04
影响因子：
5.7
通讯作者：
A. M. Vilardell;N. Cinca;I. G. Cano;A. Concustell;S. Dosta;J. Guilemany;S. Estradé;Alicia Ruiz-Caridad;F. Peiró
中科院分区：
文献类型：
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作者：
A. M. Vilardell;N. Cinca;I. G. Cano;A. Concustell;S. Dosta;J. Guilemany;S. Estradé;Alicia Ruiz-Caridad;F. Peiró
本文论述了冷喷涂生物活性纳米晶羟基磷灰石涂层的建立机制的理解，揭示了非常有前途的结果相比，更传统的技术，如等离子喷涂。提供了原料和涂层的完整表征。粉末的附聚结构被证明适合于成功地获得厚的羟基磷灰石涂层。通过Rietveld X射线精修法计算粉末和喷涂涂层中低于1.20 nm的微晶尺寸，并通过透射电子显微镜检查法确认。为了研究单个颗粒的沉积，在Ti6Al4V基底上进行了一些擦拭测试，并对纳米级特征进行了评估。所得的结构表明，没有颗粒边界的界限，并且整个涂层已经通过有效压实原始纳米晶而形成，从而导致一致和固结的层。
This article deals with the understanding of building-up mechanisms of bioactive nanocrystalline hydroxyapatite coatings by Cold Spray, revealing very promising results in contrast to more conventional techniques such as Plasma Spray. A full characterization of feedstock and coatings is provided. The agglomerated structure of the powder proved to be suitable to obtain successfully thick hydroxyapatite coatings. A crystallite size below ∼20 nm in the powder and the as-sprayed coatings is calculated by the Rietveld X-ray refinement method and agreed by Transmission Electron Microscopy. Some wipe tests were carried out on Ti6Al4V substrates in order to study the deposition of single particles and the nanoscale features were evaluated. The resulting structure indicates that there is no delimitation of particle boundaries and the overall coating has been formed by effective compaction of the original nanocrystallites, leading to consistent and consolidated layers.