Modulation Effects of K2ZrF6 Additive on Microstructure and Heat Resistance of Micro-arc Oxide Coatings Fabricated on LY12 Alumi-num Alloy
Source abstract
Abstract
基于K 2 ZrF 6 在碱性溶液中形成负电 Zr(OH) 4 颗粒的作用机理, 在添加K 2 ZrF 6 的Na 2 SiO 3 -KOH溶液中, 对LY12铝合金表面进行微弧氧化处理. 利用扫描电镜(SEM)、能谱(EDX)和X射线衍射仪(XRD)探讨了K 2 ZrF 6 添加剂对成膜速率、膜层形貌及结构的调制作用, 并借助热阻隔性能测试评价了不同溶液中所形成膜层的热阻隔效果. 结果表明, 溶液中添加K 2 ZrF 6 增大了微弧氧化的成膜速率, 使膜层的内外表面较为平整, 且膜层中大尺寸缺陷减少. EDX线扫描分析表明, 添加K 2 ZrF 6 后形成的膜层中出现大量Zr元素, 且其含量随距膜/基界面距离的增加而增加. XRD结果显示, 未添加K2ZrF6溶液制得的膜层主要由γ-Al 2 O 3 和α-Al 2 O 3 相组成; 添加K 2 ZrF 6 后, 膜层中晶态氧化物含量降低、非晶态物质增多. 隔热性能测试显示, 经K 2 ZrF 6 调制后的膜层具有更加优良的热阻隔性能.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Metal and Thin Film Mechanics · Magnesium Alloys: Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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