摘要
采用微弧氧化技术在TC4钛合金表面制备复合陶瓷膜,研究了在Na2SiO3-NaH2PO4体系电解液中分别添加K2ZrF6和氧化锆粉对膜层组织结构和性能的影响。利用扫描电镜(SEM)和X射线衍射仪(XRD)分析膜层的微观组织和相组成。用MMW-1A万能摩擦磨损试验机对复合陶瓷膜进行了耐磨性能测试。结果表明,当溶液中分别添加了K2ZrF6和氧化锆粉后,都会使陶瓷膜的厚度增加,膜层表面粗糙度降低,且膜层中大尺寸缺陷减少。添加K2ZrF6和氧化锆粉所制备的膜层中主要由金红石型TiO2和ZrO2相组成,且添加氧化锆粉制备的陶瓷膜中的ZrO2含量比添加K2ZrF6制备的膜中含量要多。添加K2ZrF6和氧化锆粉所制备的陶瓷膜的耐磨性能得到提高。
The composite ceramic coating was fabricated on TC4 alloy surface by micro-arc oxidation adding K2ZrF6 and zirconia powder separately in Na2SiO3-NaH2PO4 base electrolyte. The effects of adding K2ZrF6 and zirconia powder on microstructure and phase composition of the ceramic coating were analyzed by SEM and XRD respectively. The wear resistance of the ceramic coating was evaluated on a MMW-1A model friction and wear tester. The results show that the K2ZrF6 and zirconia powder addition can increase the thickness of the coating. The surface and interior of the coating formed in Zr-containing electrolyte become smooth. Two main phases,TiO2 and ZrO2 are contained in Zr-containing coating. The ZrO2 content in the coating added zirconia powder is more. Both addition of the K2ZrF6 and zirconia powder can improve the wear resistance of the ceramic coating.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第9期199-204,共6页
Transactions of Materials and Heat Treatment
基金
沈阳市科技计划项目(F1226840)
关键词
TC4
微弧氧化
复合陶瓷膜
耐磨性能
TC4 alloy
micro-arc oxidation
composite ceramic coating
wear resistance property
