[口头报告]Surface feature of the substrate via key factor on adhesion of Cr/Cr2N multilayer and alloy substrate

Surface feature of the substrate via key factor on adhesion of Cr/Cr2N multilayer and alloy substrate
编号:96 稿件编号:94 访问权限:仅限参会人 更新:2024-10-13 22:05:31 浏览:165次 口头报告

报告开始:2024年10月20日 15:15 (Asia/Shanghai)

报告时间:15min

所在会议:[S2] Thin Film Technologies and Applications » [S2C] Session 2C

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摘要
This study employed a combination of direct current magnetron sputtering and high-power pulse magnetron sputtering techniques to deposit Cr/Cr2N multilayer coatings on Cr-Ni-Mo-V steel substrates that had undergone mirror polishing, pickling, nitriding, and grinding. The microstructure, mechanical properties, and adhesion of the coatings were investigated using scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), hardness testing, indentation testing, and scratch testing. When the roughness of substrates with the same hardness increased from 0.086μm to 0.744μm, the adhesion of the coating, Lc2, decreased by up to 41%. Substrates subjected to plasma nitriding exhibited the highest roughness. However, plasma nitriding refined the grains while maintaining a coherent interface between the coating and the substrate. Due to the combined effects of substrate load-bearing capacity and grain refinement in the coating, both the fracture toughness (by 54%) and adhesion (by 55%) of the coating were significantly enhanced, effectively compensating for the degradation in coating performance resulting from the increased roughness. The bearing capacity and ability to promote crystallization of the substrate surface are more crucial factors compared to its roughness.
 
关键字
surface feature,adhesion,hardness,surface roughness,multilayer
报告人
Xiaoyun Ding
博士 University of Science and Technology Beijing, China

稿件作者
啸云 丁 北京科技大学
张 津 北京科技大学
连 勇 北京科技大学
梦辉 崔 北京科技大学
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