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首页> 外文会议>International Thermal Spray Conference >Influence of Particle Size on Microstructure and Properties of Al{sub}2O{sub}3 Coatings Deposited by Plasma Spraying
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Influence of Particle Size on Microstructure and Properties of Al{sub}2O{sub}3 Coatings Deposited by Plasma Spraying

机译：粒径对血浆喷涂沉积的α20{Sub} 3涂层的微观结构和性能的影响

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In the present study, Al{sub}2O{sub}3 coatings were deposited by plasma spraying using feedstock of different particle sizes. The effects of particle size on their velocity and temperature in the plasma jet, the microstructure and properties of the coatings were investigated. The results revealed that in view of the smaller inertia effects and lower heat capacity, the smaller particles can be easily accelerated and heated, and have higher in-flight velocity and temperature, which contributed to produce a denser coating with lower porosity and higher mechanical properties. It was also found that the coating deposited using the finest starting powder has the lowest thermal diffusivity. This may be reasonably correlated with the microstructural characteristics. In addition, the coating manufactured using the intermediate feedstock in terms of particle size (D50 of 19.3μm) exhibited the highest wear resistance.
机译：在本研究中，通过使用不同颗粒尺寸的原料喷涂通过等离子体喷涂沉积Al {Sub} 2O {Sub}。粒度对等离子体射流中的速度和温度的影响，研究了涂层的微观结构和性质。结果表明，考虑到较小的惯性效应和较低的热量，较小的颗粒可以容易地加速和加热，并且具有更高的飞行速度和温度，这有助于产生具有较低孔隙率和更高的机械性能的密集涂层。还发现使用最好的起始粉末沉积的涂层具有最低的热扩散率。这可以与微观结构特征合理地相关。另外，在粒度（19.3μm的D50）中使用中间原料制造的涂层表现出最高的耐磨性。

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