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首页> 外文期刊>Journal of Solid Waste Technology and Management >DEVELOPMENT OF CERAMIC COATINGS USING RED MUD—A SOLID WASTE OF ALUMINA PLANTS
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DEVELOPMENT OF CERAMIC COATINGS USING RED MUD—A SOLID WASTE OF ALUMINA PLANTS

机译：用红色泥浆（一种氧化铝植物的固体废料）开发陶瓷涂层

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摘要

Plasma Spraying is a surface modification technique that combines particle melting, rapid solidification and consolidation in a single process. But as high cost of spray grade powders limits the adoption of this technique, exploring newer and cheaper materials suitable for plasma spray coating has drawn a lot of attention. This work reports an attempt to spray coat red mud (the waste generated in alumina producing plants) on different metal substrates. Plasma sprayed coatings of red mud have been developed at different operating power levels of the plasma gun on aluminium and copper substrates. Coating adhesion strength and deposition efficiency were studied at' various operating conditions. Characterization of the coatings includes micro hardness measurement and scanning electron microscopy (SEM). It was observed that the operating power appreciably influences the coating adhesion strength and coating thickness. Coatings deposited at very low and very high power levels show poor adhesion. Maximum interface adhesion strength of ~8MPa was recorded at operating power of 12 kW. This work establishes 'red mud' as a potential coating material, which may be suitable for wear resistant applications. It also suggests a value added utilization of this industrial waste.
机译：等离子喷涂是一种表面改性技术，将颗粒熔化，快速固化和固结结合在一个过程中。但是，由于喷涂级粉末的高成本限制了该技术的采用，因此探索适用于等离子喷涂的更新，更便宜的材料引起了很多关注。这项工作报告了试图在不同的金属基材上喷涂赤泥（氧化铝生产厂产生的废物）的尝试。已经在铝和铜基板上以等离子枪的不同操作功率水平开发了赤泥的等离子喷涂涂层。在各种操作条件下研究了涂层的附着强度和沉积效率。涂层的表征包括显微硬度测量和扫描电子显微镜（SEM）。观察到操作功率明显影响涂层的粘合强度和涂层厚度。以非常低和非常高的功率水平沉积的涂层显示出较差的附着力。在12 kW的工作功率下记录的最大界面粘合强度约为8MPa。这项工作将“红泥”确立为一种潜在的涂料，可能适用于耐磨应用。这也表明该工业废物的增值利用。

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