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首页> 外文期刊>Journal of Materials Processing Technology >Influence of particle temperature and velocity on the microstructure and mechanical behaviour of high velocity oxy-fuel (HVOF)-sprayed nanostructured titania coatings
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Influence of particle temperature and velocity on the microstructure and mechanical behaviour of high velocity oxy-fuel (HVOF)-sprayed nanostructured titania coatings

机译：颗粒温度和速度对高速氧燃料（HVOF）喷涂纳米结构二氧化钛涂层的微观结构和力学行为的影响

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摘要

Nanostructured titania feedstock powders were deposited via high velocity oxy-fuel (HVOF) spraying onto Ti-6Al-4V substrates. Using in-flight particle diagnostics, different particle temperatures and velocities were employed in order to reveal their effects on microstructure and mechanical properties of the coatings. A series of linear dependencies were observed involving processing conditions (i.e., in-flight particle temperature and velocity) and characteristics of the resulting coating microstructural features and properties, such as, phase composition, Vickers microhardness and the deflection of Almen strips (residual stress). High-bond strength values were observed when compared with other ceramic thermal spray coatings available in the literature. This study provides different levels of information on the processing of nanostructured ceramic powders via HVOF spraying and opens possibilities for development and application of HVOF-sprayed nanostructured titania coatings in the biomedical field and other disciplines, where superior mechanical behaviour is required.
机译：纳米结构的二氧化钛原料粉末通过高速氧燃料（HVOF）喷涂到Ti-6Al-4V基底上。使用飞行中粒子诊断程序，采用了不同的粒子温度和速度，以揭示它们对涂层的微观结构和机械性能的影响。观察到一系列线性相关性，涉及加工条件（即飞行中的颗粒温度和速度）以及所得涂层微结构特征和性质的特征，例如相组成，维氏显微硬度和Almen条的变形（残余应力） 。与文献中提供的其他陶瓷热喷涂涂层相比，观察到了高粘结强度值。这项研究提供了有关通过HVOF喷涂处理纳米结构陶瓷粉末的不同级别的信息，并为在需要卓越机械性能的生物医学领域和其他学科中开发和应用HVOF喷涂的纳米结构二氧化钛涂层提供了可能性。

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