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首页> 外文期刊>高温学会志 >Wear Behavior of Thermally-Sprayed ZrO_2 Coatings after Treatment with Spark Plasma Sintering (SPS)
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Wear Behavior of Thermally-Sprayed ZrO_2 Coatings after Treatment with Spark Plasma Sintering (SPS)

机译：火花等离子体烧结（SPS）处理后的热喷涂ZrO_2涂层的磨损行为

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摘要

A magnesia stabilized zirconia (ZrO2-25wt% MgO) ceramic coating was deposited on the SS 400 substrate by flame spraying. The thermal spray coated steel then exposed to the treatment using spark plasma sintering (SPS) which is a new process for the densification of porous material. In the SPS process, the ceramic-coated steel was heated rapidly under vacuum and compressive loading at the temperatures of 900 and 950 °C for 10 min. The effect of SPS treatment on the wear behavior of zirconia ceramic coatings was studied. The result showed that the as-sprayed coating had a large amount of porosity up to 22% and after treatment with SPS, the porosity fell to below 5%. The bond strength and microhardness of the coating were also increased. The result from erosion wear test at different impingement angles showed that the coating after SPS treatment exhibited lower cumulative weight loss. The erosion wear mechanism on coatings was the subsurface cracks, which propagated almost parallel to the blasted surface, resulting in plough of coating material. Also the coatings after SPS treatment exhibited lower cumulative weight loss after sliding wear test compared with the as-sprayed coatings. The smeared powdery ceramic debris is revealed both on as-sprayed and SPS-treated coatings.
机译：通过火焰喷涂将氧化镁稳定的氧化锆（ZrO2-25wt％MgO）陶瓷涂层沉积在SS 400基板上。然后，使用火花等离子体烧结（SPS）对经过热喷涂的钢进行处理，这是一种用于致密多孔材料的新工艺。在SPS工艺中，将陶瓷涂层的钢在真空和压缩载荷下在900和950°C的温度下快速加热10分钟。研究了SPS处理对氧化锆陶瓷涂层磨损行为的影响。结果表明，喷涂后的涂层孔隙率高达22％，经SPS处理后，孔隙率降至5％以下。涂层的结合强度和显微硬度也增加了。在不同的冲击角度下的腐蚀磨损试验结果表明，SPS处理后的涂层表现出较低的累积失重。涂层的腐蚀磨损机理是表面裂纹，该裂纹几乎平行于喷砂表面传播，从而导致了涂层材料的犁裂。与喷涂后的涂层相比，经SPS处理后的涂层在滑动磨损试验后表现出较低的累积失重。喷涂后的粉末和经SPS处理的涂层上均会显示出粉状的陶瓷碎屑。

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