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高速电弧喷涂铝涂层性能试验研究 总被引:4,自引:1,他引:3
本文对高速电弧喷涂铝涂层和普通电弧喷涂铝涂层进行了对比试验研究。结果表明:高速电弧喷涂粒子束更加集中,粒子的飞行速度显著提高,粒子的雾化效果明显改善。高速电弧喷滁铝涂层具有结合强度高、硬度高、孔隙率低、组织致密等特点。 相似文献
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高速电弧喷涂镍铝打底层结构与性能研究 总被引:3,自引:0,他引:3
高速电弧喷涂技术是近年来发展起来的新型热喷涂技术,该技术具有优势,高效,低成本等特点,本文实验研究了高速电弧喷涂镍铝打底涂层的组织结构和力学性能,涂层的界面结合强度大于40MPa,显微硬度平均值为210HV,表面粗糙度表征参数Ra值为13.11um,涂层孔隙率为2.26%,涂层主要由镍铝合金和镍,铝氧化物组成,高速电弧喷涂镍铝涂层结合强度高,涂层组织致密,是优良的打底涂层。 相似文献
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本文研究了稀土对铝和铝合金电弧喷涂层性能的影响,对叫种丝材涂层的结合强度、孔隙率进行了对比,井利用光学显徽镜.扫描电镜观察分析了涂层组织结构。结果表明稀土的加入提高了涂层曲结合强度.使孔隙变小.数量减少,明显改善涂层性能。 相似文献
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Studies on plasma spraying of zircon (ZrSiO4) have been carried out by the authors as one of the candidates for an environmental barrier coating (EBC) application, and
had reported that substrate temperature is one of the most important factors to obtain crack-free and highly adhesive coating.
In this study, several amounts of yttria were added to zircon powder, and the effect of the yttria addition on the structure
and properties of the coatings were evaluated to improve the stability of the zircon coating structure at elevated temperature.
The coatings obtained were composed of yttria-stabilized zirconia (YSZ), glassy silica, whereas the one prepared from monolithic
zircon powder was composed of the metastable high temperature tetragonal phase of zirconia and glassy silica. After the heat
treatment over 1200 °C, silica and zirconia formed zircon in all coatings. However, coatings with higher amounts of yttria
exhibited lower amounts of zircon. This resulted in the less open porosity of the coating at elevated temperature. These yttria-added
coatings also showed good adhesion even after the heat treatment, while monolithic zircon coating pealed off. 相似文献
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在非占位涂料技术中,如何实现模样的顺利起模而不破坏涂层是发挥这一技术优势的下措施:合理的设计涂料成分,在涂料表面喷一层过渡层,采用脱模剂以及适当的模样设计,如过渡模法(又称两步法)、模样分块法,采用组芯造型和设计起模机构等. 相似文献
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