马群,李言,王萍,韩婧,周立果

• 1:西安理工大学机械与精密仪器工程学院
• 2:西安工业大学光电工程学院
• 3:西安工业大学陕西省光电功能材料与器件重点实验室

摘要(Abstract)：

采用改进的等离子体电解氧化(PEO)技术在锆盐体系和锆盐-钇盐体系电解液中制备ZAl Sil2Cu3Ni2合金表面ZrO_2-Y_2O_3陶瓷层和Y_2O_3-ZrO_2-Y_2O_3陶瓷层,研究电解液中稀土钇盐Y(NO_3)_3对PEO陶瓷层组织和耐高温性能的影响。通过SEM、XRD等分析方法对陶瓷层的组织结构及相组成进行了分析,并对陶瓷层的隔热性能及高温稳定性进行了测试。结果表明,与ZrO_2-Y_2O_3陶瓷层相比,Y_2O_3-ZrO_2-Y_2O_3陶瓷层表面由细小颗粒组成,涂层均匀、致密;锆钇盐体系陶瓷层形成了钇部分稳定锆的固溶体(Y_2O_3和Y_(0.15)Zr_(0.85)O_(1.93)□_(0.07)),并提高了反应温度;Y_2O_3-ZrO_2-Y_2O_3陶瓷层生长速度大于ZrO_2-Y_2O_3陶瓷层,其中向外生长厚度明显增大;另外,隔热性能得到提高。Y_2O_3-ZrO_2-Y_2O_3陶瓷层试样经400℃高温氧化处理,其氧化增重曲线呈对数规律,氧化增重量小,表明高温稳定性良好。

关键词(KeyWords)： Al-12Si合金;稀土钇盐;等离子体电解氧化;ZrO2-Y2O3陶瓷层;隔热性能;高温氧化

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51401155,51475366);; 陕西省自然科学基础研究计划(2015JQ5175);; 国家重点基础研究发展计划(2012CB619602-3和2012CB619606-2)

作者(Author): 马群,李言,王萍,韩婧,周立果

DOI: 10.13289/j.issn.1009-6264.2016.12.022

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